Copyright: ® Roberta M. Cobb


Help Contents
Contents

Xpress Help File

May Release

Product History

Xpress System / Baseboard Revision Summary

Xpress Processor Module Revision Summary

Latest Versions of Software

ECO Histories

General Product Information

IPTL Tested Product List

Approved Vendor List for all User Installable Parts

Readme Files

Novell Certifications

Frequently Asked Questions

Orderable Spare Parts

Known Errata

Module and Baseboard TPS

Introduction

Xpress Scaleable Architecture

Xpress CPU Modules

Xpress Memory Modules

RAID Disk Controller Card

Xpress System Baseboards

Appendicies

System TPS

System Level Features

Desktop Chassis Features

Deskside/LX Mainstream Server Chassis

Deskside/MX Premium Server

System Accessories

Appendicies


May Release

This file was compiled on May 25, 95

•	Minor formatting changes scattered throughout

•	Added ECOs for ECC Memory Module


Xpress System / Baseboard Revision Summary

Product	PBA	Rev.	BIOS Level	ECU	Suggested BIOS/ECU	Date	Release Notes
Desktop	517901	-002	1.00 03.R0	2.1	19.R0 / 2.9.4	1/92	Production Release
XBASE6E4F		-003	1.00 03.R0	2.1	19.R0 / 2.9.4	2/92	Changed value of Tantilum caps.
		-004	03 or 04.R0	2.1	19.R0 / 2.9.4	4/92	Changed value of RESP0# pull-up resistor
		-005	1.00 04.R0	2.1	19.R0 / 2.9.4	4/92	New stepping WD90C30
		-006	1.00 04.R0	2.1	19.R0 / 2.9.4	4/92	Changed to -60 ns video DRAM's
		-007	1.00 04.R0	2.1, 2.3	19.R0 / 2.9.4	5/92	New stepping WD90C30
		-008	1.00 04.R0	2.3	19.R0 / 2.9.4	9/92	New MECA ASIC (MECA Prime)
XBASE6E4F-B	519610	-003	1.00 06.R0	2.4	19.R0 / 2.9.4	12/92	New basebd Fab, WD90C31, 32K colors
		-004	1.00 06.R0	2.4	19.R0 / 2.9.4	7/93	New stepping 90C63 video clock
		-005	1.00 06.R0	2.4	19.R0 / 2.9.4	8/93	TI 16C552 fixes serial port problem.
		-006	1.00.17.R0	2.4	19.R0 / 2.9.4	7/94	Was supposed to be BIOS 17, but had default setting problem.  Boards were flashed back to BIOS 6 before leaving factory.
		-007	1.00.19.R0	2.9.4	none	9/94	MECA v3.0  Note:  Built at BIOS 17, but flashed to BIOS 19 before shipment.
		-008	1.00.19.R0	2.9.4	none	9/94	Hard disk table entry 13 was added to support a new drive geometry, etc.
Deskside	517903	-002	1.00 03.V0	2.1	06.V0 / 2.4	1/92	Production Release
XBASE8TE8F		-003	1.00 03.V0	2.1	06.V0 / 2.4	2/92	Changed value of Tantilum caps.
		-004	03 or 04.V0	2.1	06.V0 / 2.4	4/92	Changed value of RESP0# pull-up resistor
		-005	1.00 04.V0	2.1	06.V0 / 2.4	4/92	New stepping WD90C30
		-006	1.00 04.V0	2.1	06.V0 / 2.4	4/92	Changed to -60 ns video DRAM's
		-007	1.00 04.V0	2.1, 2.3	06.V0 / 2.4	5/92	New stepping WD90C30
		-008	1.00 04.V0	2.3	06.V0 / 2.4	9/92	MECA prime
XBASE8TE8F-B	518597	-002	1.00 06.V0	2.4	none	12/92	New Fab, WD90C31, 32K color RAMDAC
		-003	1.00 06.V0	2.4	none	6/93	New stepping 90C63 video clock
Deskside/MX -	540374	-004	1.00 08.AM0	2.5	19.AM0 / 2.9.4	6/93	Pre-production
Premium		-005	1.00 08.AM0	2.5	19.AM0 / 2.9.4	7/93	Pre-production
XBASE8TE8F-C		-006	1.00 11.AM0	2.7	19.AM0 / 2.9.4	7/93	Pre-production
XBASE8TE16F-C		-007	1.00 12.AM0	2.7	19.AM0 / 2.9.4	8/93	Production Release
	614727	-003	1.00 12.AM0	2.7	19.AM0 / 2.9.4	12/93	MECA v3.0 - Fast EISA - ECC support
	621053	-001	1.00 17.AM0	2.9.1	19.AM0 / 2.9.4	5/94	New Adaptec Rev E AIC-7770
		-002	1.00 19.AM0	2.9.4	none	9/94	New Adaptec BIOS
Deskside/LX -	519801	-001	1.00 06.V0	2.4	none	4/93	Production Release with -B baseboard
		-002	1.00 06.V0	2.4	none	2/94	EOL Video Clock Generator
Mainstream	519800	-005	1.00 09.AK0	2.5	19.AK0 / 2.9.4	7/93	Non-SCSI version of -C baseboard
XLXBASE8TE16F		-006	1.00 12.AK0	2.6	19.AK0 / 2.9.4		New BIOS
XLXBASE8TE8F	614726	-003	1.00 12.AK0	2.7	19.AK0 / 2.9.4	2/94	MECA V3.0 - Fast EISA - ECC support
		-004	1.00.17.AK0	2.9.1	19.AK0 / 2.9.4	7/94	BIOS support for ECC
		-005	1.00.19.AK0	2.9.1	none	10/94	Fixes caching problem when more than 256 Mbytes installed.
/LX with SCSI	540374	-004	1.00 08.AM0	2.5	19.AM0 / 2.9.4	6/93	Production Release with -C baseboard
XLXBASE8TE8FS		-005	1.00 09.AM0	2.5	19.AM0 / 2.9.4	7/93	BIOS v09
XLXBASE8TE16FS		-006	1.00 11.AM0	2.7	19.AM0 / 2.9.4	7/93	BIOS v11
		-007	1.00 12.AM0	2.7	19.AM0 / 2.9.4		BIOS v12
	614727	-003	1.00 12.AM0	2.7	19.AM0 / 2.9.4	12/93	MECA v3.0 - Fast EISA - ECC support
	621053	-001	1.00 17.AM0	2.9.1	19.AM0 / 2.9.4	5/94	New Adaptec Rev E AIC-7770
		-002	1.00 19.AM0	2.9.4	none	9/94	New Adaptec BIOS


Xpress Processor Module Revision Summary

Product	PBA	Rev.	BIOS Level	ECU	Suggested BIOS/ECU	Date	Release Notes
i486™SX/25 CPU
BXCPU486SX25	518184	-005					EOL - Twin socket
BXCPU486SX25-B	540363	-205					Integrated Cache Module
		-210				2/94	New Fab to Bury Blue Wire
i486 SX/33 CPU Module
BXCPU486SX33C-B	540362	-305					EOL
		-310				2/94	New Fab to Bury Blue Wire
i486 DX/33 CPU Module
BXCPU48633	518133	-005					EOL
BXCPU48633-B	613174	-005
		-010				2/94	New Fab to Bury Blue Wire
i486 DX/50 CPU Module
BXCPU48650	517684	-007
		-008				10/92	85C224-80 EPLD shortage
	611408	-002				2/93	Remove excess printed circuit board.
i486 DX2/66 CPU Module
BXCPU486DX266	519565	-001					EOL
BXCPU486DX266-B	519917	-105
		-110				2/94	New Fab to Bury Blue Wire
60 MHz Pentium™ Processor Module
BXCPUPENT60	613832	-001					Pre-Production
		-002					Pre-Production
		-003					Pre-Production
		-004				8/93	Production Release
		-005				8/93	Temporary FanSink
		-006				8/93	EPLD Modified for Lock
		-007				8/93	EPLD Modified for Lock with Temporary FanSink
		-020				12/93	C1 stepping
		-021				7/94	Fused tantalum caps
	633677	-001				1/95	D1 stepping
66 MHz Pentium™ Processor Module
BXCPUPENT66	614023	-005				1/94	Production Release
		-006				6/94	Fused tantalum caps
	633678	-001				1/95	D1 stepping
90 MHz Pentium™ Processor Module
BXCPUPENT90	622940	-001				6/94	Production Release
	623918	-002				6/94	Production Release
		-020				7/94	Added VR CPU capability
		-021				11/94	Fixed Write-Through Memory problem when loading Netware
	633927	-001				1/95	B5 stepping
	633927	-002				3/95	C2 stepping
100 MHz Pentium™ Processor Module
BXCPUPENT100	622590	-001				6/94	Production Release
	623917	-001				6/94	Production Release
		-020				7/94	Added VR CPU capability
		-021				11/94	Fixed Write-Through Memory problem when loading Netware
	633911	-001				1/95	B5 stepping
	633911	-002				2/95	C2 stepping


Latest Versions of Software

Software	Current Version	How to Obtain
System Configuration Disk	2.9.4	Diskette ships with system
Western Digital Video Drivers for DOS	4.3A	Diskette ships with system
Western Digital Video Drivers for Microsoft Windows 3.1 and 3.11	4.3B	Diskette ships with system
Adaptec AIC-7770 SCSI Manager for OS/2, NetWare 3.1x, NetWare 4.0x, and Windows NT (DOS format disk)	2.02s	Diskette ships with system
Adaptec AIC-7770 SCSI Manager for SCO UNIX and UnixWare (Unix Format disk)	2.02	Diskette ships with system
Xpress Diagnostics	2.21	Diskette ships with system


ECO Histories

AM0 BIOS History

R0 Desktop BIOS History

Board History

Desktop System History

Deskside LX/MX System History

Software/Driver History


AM0 BIOS History

BIOS 19 AM0

BIOS 18.AK0 and AM0


BIOS 19 AM0

About This Release

o	BIOS 0.01.19.AM0)

Features/Errata Fixed In This Release

o	Fixes 256M and greater caching anomoly.

o	Altered EISA function return codes to accomodate changes in installed memory size without invalidating all EISA data structures.

o	Only Slot 0 function 0 returns 1 for choice 25, earlier BIOSs returned 1 for all slots and functions. (We are using S1/F1/C25 as a BIOS/ECU communications bit).

o	DPT with IDE failure, root cause was fixed in the planar BIOS IDE code.

o	Error code and screen management was re-worked to assure persistence of some error codes on the screen.

o	Parity RAM failures are isolated and reported to the SIMM level.

o	Base memory is cleared on warm boot.

o	Fixed error loging that was broken in BIOS 18.

o	Assure DX is zero before boot attempt.

Features Included In This Release

o	Changed to more performance oriented defaults in setup.

o	Bypasses the "keyboard lock boot pause" when Network password feature is enabled.

o	All Adaptec initialization code (with the exception of H/W disable) was removed from the BIOS. BIOS relies in the SCSI BIOS to correctly accomplish

Known Errata With This Release

o	None.

Features Still To Be Added / Comments About This Release

o	None.


BIOS 18.AK0 and AM0

About This Release

1.	This is the release of BIOS 18 and provides individual BIOS tailored for each specific Xpress platform:

0.02.18.AK0	Deskside w/o SCSI

2.	NOTE: X-Series System Configuration Disk, Release 2.9.1 or above must be used with this BIOS.

Features/Errata Fixed In This Release

1.	Warm boot failure when Windows 3.11/DOS 6.2 version of EMM386 installed.

Features Included In This Release

1.	PC+MP 1.1 specification compatibility implemented.

Known Errata With This Release

o	None.

Features Still To Be Added / Comments About This Release

o	None.


R0 Desktop BIOS History

BIOS 19.R0

About This Release

o	BIOS 0.01.19.R0 XPRESS

Features/Errata Fixed In This Release

o	Fixes 256M and greater caching anomoly.

o	Altered EISA function return codes to accomodate changes in installed memory size without invalidating all EISA data structures.

o	Only Slot 0 function 0 returns 1 for choice 25, earlier BIOSs returned 1 for all slots and functions. (We are using S1/F1/C25 as a BIOS/ECU communications bit).

o	DPT with IDE failure, root cause was fixed in the planar BIOS IDE code.

o	Error code and screen management was re-worked to assure persistence of some error codes on the screen.

o	Parity RAM failures are isolated and reported to the SIMM level.

o	Base memory is cleared on warm boot.

o	Fixed error loging that was broken in BIOS 18.

o	Assure DX is zero before boot attempt.

Features Included In This Release

o	Changed to more performance oriented defaults in setup.

o	Bypasses the "keyboard lock boot pause" when Network password feature is enabled.

Known Errata With This Release

o	None.

Features Still To Be Added / Comments About This Release

o	None.


Board History

Dual Pentiumä Processor Module

BXCPUPENT90, 100 CPU

BXCPUPENT60, 66 CPU

BXCPU486DX266, SX25, SX33

BXECCMEM

Deskside/MX - Premium

PBA 621053 (Deskside /MX, /LX)

PBA 519610 (Desktop)


Dual Pentiumä Processor Module
Dual Pentium™ Processor Module

Dual Pentium™ Processor Module − Class III

Implemented 1/95

The Software Kit was deleted because all current products ship with updated BIOS.  Also, the operating systems now have mulitprocessing drivers included in their software.

Pentium Processor Module changing to fused tantalium capacitors − Class III

Current Implementation Date: Implemented

To improve module reliability fused tantalium capacitors will now be used.

Flat Heatsink on all CPU Modules  − Class III

Current Implementation Date: Implemented 5/94

The cavity heatsink is being replaced with one that has a flat bottom, this is being done to improve manufacturing quality.


BXCPUPENT90, 100 CPU

Note: Schematic for this product is was created by  ECO 5519509, part number 631683 from 624149.  The CAD tool used for the original schematic is no longer available, so 631683 is not created electronically.

BXCPUPENT90, 100 CPU Stepping Change (B5) − Class III

Implementation Date: 1/95

Fully enables multi-processing, fixes the floating point flaw, and increases the yield to 90 MHz.

BXCPUPENT90, 100 CPU Stepping Change (C2) − Class III

Implementation Date: Not tracked

Eliminates gold heat-spreader.

BXCPUPENT90, 100 FAB Changes − Class III

Current Implementation Date: 2/95

Buries the blue wire

BXCPUPENT90, 100 Memory Write-Through Fix − Class II

Implemented 11/94

Implements a fix to prevent the possibility of memory corruption in some applications when the board cache is configured for write-through mode and the application does multiple partial writes to memory. There are no problems with write-back mode.

BXCPUPENT90, 100 SAK Kit Deleted − Class III

Implemented 12/94

BIOS 19 is now being shipped with product. This special kit with the BIOS is no longer needed.


BXCPUPENT60, 66 CPU

BXCPUPENT60, 66 CPU Stepping Change (D1) − Class III

Implementation Date: 1/95

Incorporates new stepping of processor, which eliminates C1 step errata, fixes the floating point flaw, and improves manufacturability.

Pentium Processor Module changing to fused tantalium capacitors − Class III

Current Implementation Date: Implemented

To improve module reliability fused tantalium capacitors will now be used.

Flat Heatsink on all CPU Modules  − Class III

Current Implementation Date: Implemented 5/94

The cavity heatsink is being replaced with one that has a flat bottom, this is being done to improve manufacturing quality.


BXCPU486DX266, SX25, SX33

BXCPU486DX266, SX25, SX33 CPU stepping change (SL enhanced) − Class III

Implemented, No PBA Change.

Incorporates new stepping of processor, which eliminates CPU errata and improves manufacturability.


BXECCMEM

BXECCMEM0 − Class II

Current Implementation Date: 8/95

New fab to reduce noise which will allow Intel to qualify more SIMM vendors on Xpress &

Xtended Xpress baseboards.

BXECCMEM0 − Class III

Current Implementation Date: 5/95

Add 470pf capacitor for Xtended Xpress noise reduction..

BXECCMEM0 Adding Windows NT v3.1 Capability − Class II

Current Implementation Date: 2/95

Also updating NT & SCO drivers to lock out external memory cycles during an ECC Error Memory Scrubbing Cycle. OS2, Netware 4.1, and Unixware 2.0 will be dropped until the ECC Error Memory Scrubbing Cycle is fixed.


Deskside/MX - Premium

New Version MECA ASIC − Class I

Implemented 6/94

The MECA ASIC has been revised to support ECC memory and Fast EISA and now is in full production on the following product codes, XBASE8TE16F-C and XLXBASE8TE16F. This revision adds full support for Type C EISA slave DMA transfers.  IMPORTANT NOTE:  Boards with MECA 3 must use BIOS 17 or higher

All MX and LX baseboards with integrated SCSI are now being built with full ECC memory support.  If the use of ECC memory is required, it is important to verify the version of baseboard by using the PBA number, which can be found printed on the shipping carton label. In addition there is a utility available on the BBS (MECATEST.EXE) which can be used to determine if a system supports ECC memory or not.


PBA 621053 (Deskside /MX, /LX)

New Stepping of Adaptec AIC-7770 SCSI Controller (8-slot -C baseboards only)  − Class I

Current Implementation Date: Implemented 6/94

A new Rev. E stepping of the integrated SCSI controller provides a performance improvement over the current Rev. C controller. To fully support this new controller, there is a new version of the system BIOS (1.00.17.AM0), a new EISA Configuration Utility (version 2.9.1), and new SCSI drivers. The new PBA number for the 8-slot -C baseboard will be 621053-001.

The AIC-7770E(rev.E) has the same form, fit, and function as its predecessor, the AIC-7770C.  The AIC-7770E is Software Manager and Device Driver compatible to the AIC-7770C.  It has been thoroughly and rigorously tested for both compatibility and reliability.  The enhancements are:

•	SCB (SCSI Command Block) swapping supported

•	Wide and Differential SCSI supported

•	Operating System support for NetWare(3.11, 3.12, 4.X), OS/2 2.X,

•	Windows NT 3.1, SCO UNIX 3.2.4, USL SVR 3.2.4, and Unixware 1.1


PBA 519610 (Desktop)

New Version MECA ASIC − Class I

Implemented 9/94

The MECA ASIC has been revised to support ECC memory and Fast EISA.  This revision adds full support for Type C EISA slave DMA transfers.   IMPORTANT NOTE:  Boards with MECA 3 must use BIOS 17 or higher.

Remove Western Digital 16C552, add Texas Instruments 16C552, add Filter Caps − Class I

Current Implementation Date: Implemented 8/93

Due to errata within the Western Digital 16C552 serial port controller, it is being removed from the Approved Materials List. Texas Instruments is now the only supplier for this component. In addtion, 12 filter capacitors are being added to the serial port modem status lines to eliminate any signal noise introduced by serial devices connected to the port.

New version Xpress 8-slot baseboard − Class I

Implemented

A new version of the Xpress 8-Slot baseboard incorporates an Adaptec 7770 dual-channel SCSI controller onto the baseboard. All eight EISA slots now will be bus-masters and the new board will now support Symetric Multi-Processing. This board will come in two versions: a SCSI version for the Deskside/MX (PBA 540374-007 and BIOS 1.00 11.AM0) and a non-SCSI version for the Xpress/LX (PBA 519800-007 and BIOS 1.00 08.AK0, switching to 1.00 12.AK0 in August).


Desktop System History

(in reverse chronological order)

Desktop Country Kit − Class III

Current Implementation Date: est 4/95

Updated WD driver which will eliminate video characters being dropped. Adding Qualified SIMM List.

Logo Addition  Class III

Current Implementation Date: 7/94

Two Intel Inside Logos will be added to the product.  One approximately 1-inch label will be applied to the bezel in the upper left hand corner. On the shipping container, one approximately 3½-inch label will be placed near one of the two product code labels.

New Version of Xpress Diagnostics − Class II

Current Implementation Date: 5/94

Enhancements to the XDIAGNOTICS version 1.46 package now provide diagnostic support for the Dual Pentium™ processor module, the new Pentium processor at iCOMP™ index 735\90 MHz (P54C) module, the new IntelDX4™ module, and the new ECC memory module.

New Version of Xpress Desktop 215 Watt Power Supply − Class I

Current Implementation Date: Implemented 2/94

A new version of the Teapo 215 watt power supply will be used in the Xpress Desktop system. This new supply incorporates changes to improve operability in the 220 voltage range.

Floppy Drive will now have edge connector -- Class II

Current Implementation Date: 12/93

The 3½" TEAC floppy drive shipped with all Xpress systems will have an edge connector rather than DIN. A new floppy cable will be installed to support this drive.

New Color of Floppy Access LED -- Class II

Implemented 8/93

The supplier for Xpress floppy drives has informed us that they have run out of amber colored LEDs and now will be shipping with green LEDs. They will switch back to amber once the supplier is able to again stock amber. If it's unaccaptable to receive floppy drives with green LEDs, please contact the nearest Intel Sales Office.


Deskside LX/MX System History

(in reverse chronological order)

Deskside LX/MX with SCSI Country Kit Changes − Class III

Current Implementation Date: est 4/95

Updated WD driver which will eliminate video characters being dropped. Adding Qualified SIMM List.

Updated Windows NT 2.02S driver to fix problem with NT auto-detecting SCSI controller.

Deskside LX without SCSI Country Kit Changes − Class III

Current Implementation Date: 4/95

Updated WD driver which will eliminate video characters being dropped. Adding Qualified SIMM List.

Deskside/LX 230 watt Power Supply  Class III

Implemented 12/94

Adds extra connector for a new chassis. Power Supply going from Rev 06 to Rev 07.

Logo Addition  Class III

Current Implementation Date: 7/94

Two Intel Inside Logos will be added to the product.  One approximately 1-inch label will be applied to the bezel in the upper left hand corner. On the shipping container, one approximately 3½-inch label will be placed near one of the two product code labels.

New Version of Xpress Diagnostics − Class II

Current Implementation Date: 5/94

Enhancements to the XDIAGNOTICS version 1.46 package now provide diagnostic support for the Dual Pentium™ processor module, the new Pentium processor at iCOMP™ index 735\90 MHz (P54C) module, the new IntelDX4™ module, and the new ECC memory module.

New Version of Deskside/LX Astec 230 Watt Power Supply − Class I

Current Implementation Date: 5/94

Enhancements to the Astec 230 watt power supply improve operation under high +12 volt loads. Some peripherals, such as CD-ROM drives, have high +12 volt inrush current. Changes in the +12 volt circuitry allow higher levels of inrush current to be tolerated by the power supply.

Floppy Drive will now have edge connector -- Class II

Current Implementation Date: 12/93

The 3½" TEAC floppy drive shipped with all Xpress systems will have an edge connector rather than DIN. A new floppy cable will be installed to support this drive.

New Color of Floppy Access LED -- Class II

Implemented 8/93

The supplier for Xpress floppy drives has informed us that they have run out of amber colored LEDs and now will be shipping with green LEDs. They will switch back to amber once the supplier is able to again stock amber. If it's unaccaptable to receive floppy drives with green LEDs, please contact the nearest Intel Sales Office.


Software/Driver History

Not available at this time


IPTL Tested Product List

Xpress Deskside/MX Premium Server

This summary is from file EXPR613.doc, the full iPTL test report.  This report is available.

Related Topics:

HARDWARE TESTING USED IN INTEROPERABILITY AND SYSTEMS

OPERATING SYSTEMS AND HARDWARE USED IN NETWORK TESTING

Software Used In All Testing, Including Operating Systems


HARDWARE TESTING USED IN INTEROPERABILITY AND SYSTEMS

CD-ROM DRIVES	KEYBOARDS	SOUND BOARDS
Creative Labs CT-531 external	AT&T AT	Cyber Audio with ISA SCSI
Mitsumi FX-001	BTC AT	ProAudio Spectrum 16
NEC CDR 74-1 (multispin) external	Cherry Regular AT	Sonic Sound
Panasonic CR-563B	Hi-Tek PS/2	Sound Blaster Pro II
Toshiba XM-3301E1 external	Hi-Tek RT101+	Sound Blaster 16 Basic
Toshiba XM-3401 internal	KeyCat II	Sound Blaster 16 ASP
DISK CONTROLLERS	Key Tronic AT	Sound Blaster 16 SCSI-2
Onboard (IDE/SCSI)	Key Tronic 101 Enhanced	Sound Blaster Multi-CD
AccuLogic (ISA/IDE)	NMB RT-101+	Turtle Beach Multi Sound
Adaptec 1542B (ISA/SCSI)	MEMORY BOARDS	TAPE DRIVES
Adaptec 1542CF (ISA/SCSI)	AboveR Board Plus	Archive 2150ES (SCSI Tape)
Adaptec 1740A (EISA/SCSI)	AST Rampage	Archive 2150S (SCSI Tape)
Adaptec 2740T (EISA/SCSI)	JRAM	Archive Python DAT (DAT)
Adaptec 2740T (EISA/SCSI)	MICE	Exabyte 8200T (SCSI)
Adaptec 7770 (EISA/SCSI)	Logitech Bus mouse	VIDEO ADAPTERS
DPT 2022 (EISA/SCSI)	Logitech PS/2 Ergo mouse	Onboard
DPT 2122 (EISA/SCSI)	Logitech PS/2 Standard mouse	#9 GXE ISA 1MB
DTC 2290B (IDE/SCSI)	Logitech PS/2 Trackball	ATI Graphics Wonder 1MB (ISA)
Future Domain 1680 (ISA/SCSI)	Logitech Serial mouse	ATI UltraPro EISA 2MB
Ultrastor 14F Cache 2MB (EISA/SCSI)	Microsoft Bus mouse	ATI UltraPro ISA 2MB
Ultrastor 15C Cache 2MB (ISA/IDE)	Microsoft Ergo PS/2 mouse	Diamond SpeedStar Pro 1MB (ISA)
HARD DRIVES	Microsoft Ergo Serial mouse	Orchid Farenheit 1280 1MB (ISA)
Conner CP30170E (SCSI)	Microsoft PS/2 mouse	Orchid ProDesigner 2 1MB (ISA)
Conner CP30174 (IDE)	Microsoft Serial mouse	Paradise Windows Accelerator 1 MB (ISA)
Conner CP31370 (SCSI)	Mitsumi PS/2 Compatible mouse
Fujitsu M2624F-512 (SCSI)	Mouse Systems Serial
Maxtor 7131 (IDE)	MISCELLANEOUS
Maxtor 7245SR (SCSI)	Bernoulli Box II
Maxtor MXT 7345	Colorado JuMBo 250 Floppy Tape
Quantum 105S (SCSI)	DCP 286i Diagnostic v1.10
Quantum ELS 170S (SCSI)	DCP/MUXi Diagnostic
Quantum LPS 170S (SCSI)	HardCard 40MB
Quantum LPS 240S (SCSI)	Intel EtherExpressTM 16
Quantum LPS 270A (IDE)	IRMA 2
Quantum LPS 540S	IRMA 3
Seagate ST11950N (SCSI)	MODEMS
Western Digital AC2340 (IDE)	Hayes 9600 SmartModem
Western Digital AC2420 (IDE)	Intel 2400ex modem
	Intel SatisFAXtionR 400
	Intel SatisFAXtionR modem 100


OPERATING SYSTEMS AND HARDWARE USED IN NETWORK TESTING

BANYAN VINES	MICROSOFT LAN SERVER	PEER TO PEER NETWORKS
v5.53(0), Server	v3.0, Advanced	LANtastic v.5.00
Workstation	DOS/Windows Workstation	Intel EtherExpressTM 16
Adaptec 1542B	OS/2 Workstation	Novell Personal NetWare v.1.0
Archive 2150ES	Adaptec AHA 2542CF	Windows for Workgroups v.3.11
NEC CDR-74	Python DAT
Network Adapters:	Network Adapters:
Banyan ICA	IBM Token Ring II
IBM Token Ring 16/4	Intel EtherExpressTM 16
Intel EtherExpressTM 16	Intel EtherExpress Flash32 (EISA)
Intel EtherExpressTM 32 (EISA)	MICROSOFT WINDOWS NT
Intel TokenExpressTM 16/4s	v3.1 Advanced Server
Intel TokenExpressTM 32 (EISA)	Workstation
Novell NE2000	Adaptec 1542B
Novell NE3200 (EISA)	Archive 2150ES
Proteon 1392	Sound Blaster Pro II
Proteon 1990 (EISA)	Toshiba 3301
MICROSOFT LAN MANAGER	Network Adapters:
v2.2, Server	Intel EtherExpressTM 16
DOS/Windows Workstation	NOVELL NETWARE
OS/2 Workstation	v4.01, Server
Adaptec AHA 2542CF	v3.12, Server
Python DAT	v2.2, Server
Network Adapters:	SFT III
IBM Token Ring II	Workstations
Intel EtherExpressTM 16	Adaptec 1542CF
Intel EtherExpress Flash32 (EISA)	HP C1533
Intel TokenExpressTM 16/4s	NEC CDR-74
Intel TokenExpressTM 32 (EISA)	Network Adapters:
	3COM 3C579 Etherlink III (EISA)
	Digiboard 8-Port
	IBM TokenRing 16/4
	Intel EtherExpressTM 16
	Intel EtherExpressTM 32 (EISA)
	Intel EtherExpress Flash32 (EISA)
	Intel TokenExpressTM 32 (EISA)
	Proteon 1990 (EISA)
	SMC Arcnet PC130
	SMC PC600FS
	Thomas Conrad TC 3045


Software Used In All Testing, Including Operating Systems

BENCHMARKS & DIAGNOSTICS	MISC. SOFTWARE	SOFTWARE APPLICATIONS
Checkit v3.0	Aquarium v5.6	AutoCAD 11
DESQview v2.25	Flight Simulator v4.0	dBASE IV v1.1
DisplayMate Professional v1.1	Wing Commander 2	Excel v4.0 for Windows
Floating Point Sequencer v1		Lotus 1-2-3 r3.1
GST AT1000 Diagnostic v1.01	MULTIMEDIA APPLICATIONS	Mathematica v2.0
Landmark Benchmarks v2.0	Animotion MCS Stereo v1.04	Paradox v3.5
Matlab 387 v3.25	Battle Chess (1991) for Windows	PowerPoint v3.0 for Windows
Norton SI v4.5	Beethoven (1992) for Windows	Quattro Pro v3.0
PC Labs Bench 29 test v5.5	Bookshelf (1992) for Windows	Word v2.0 for Windows
PC Labs Benchmarks v7.0	Mammals (1990 NGS)	WordPerfect v5.1
Performance Suite	Seventh Guest v1.1t	WordPerfect v5.1 for Windows
QAPlus v4.70
XTree Gold v1.3	MS Windows for Workgroups v3.11
COMMUNICATION SOFTWARE	Novell NetWare v4.01
Crosstalk v2.0	Novell NetWare v3.12
First Choice v3.00	Novell NetWare SFT III
Procomm Plus v2.0	Novell Personal NetWare 1.0
MEMORY & DRIVE MANAGERS	SCO UNIX Open Desktop v2.0
Disk Optimizer v4.05	SCO UNIX V3.2.4.0
EMM386.sys v4.0	SunSoft Solaris V2.1
EMM386.sys v4.49	UnixWare
Fastback Plus v3.0
Gravis Ultrasound
Himem.sys v2.04
QEMM v7.0
RAMdrive.sys v2.12
Smartdrive.sys v2.10


Approved Vendor List for all User Installable Parts

(FaxBACK document 4143)

Related Topics:

Performance Upgrades

External Cache Socket

System Memory

Video DRAM Memory

XRAID4 Cache memory


Performance Upgrades

OverDrive Processor Socket	i487 SX/25 coprocessor

i487 SX/33 coprocessor

OverDrive Processor;  50 MHz and 66 MHz versions


External Cache Socket

IDT Cache Module (128 KB Direct Mapped Cache)

Intel Turbocache486™  (64/128 KB Set Associative Cache)

Recommended Cache Static RAMs (Table A-1)

Size	Type	Required	Vendor	Part #
32k x 9	data	4;  44-pin PLCC	Motorola	MCM62486-24
32k x 9	data	4;  44-pin PLCC	SGS Thompson	MK2486Q-24
32k x 9	data	4:  44-pin PLCC	NEC	uPD43259A-15
8k x 8	tag	2;  28-pin DIP	Motorola	MCM6264C-15
8k x 8	tag	2;  28-pin DIP	IDT	IDT71B74-15
8k x 8	tag	2;  28-pin DIP	Micron	MT5C6408-15
8k x 8	tag	2:  28-pin DIP	NEC	uPD4368-15
Table A-1. Recommended Cache Static RAMs.


System Memory

Baseboard SIMM Configuration Guide

Intel Tested and Approved SIMM Vendor List

Intel Tested or Customer Tested SIMM Vendor List

Intel Tested SIMM Vendor List for BXECCMEM0 Only

Known Incompatible SIMMs on the Baseboard, BXMEM0, or BXECCMEM0 Memory Modules


Baseboard SIMM Configuration Guide

J0550    (bank 0)	J0551   (bank 0)	J0650   (bank 1)	J0651   (bank 1)	Total Memory
1MB SIMMs	1MB SIMMs	-----	-----	2 MB
1MB SIMMs	1MB SIMMs	1MB SIMMs	1MB SIMMs	4 MB
2MB SIMMs	2MB SIMMs	-----	-----	4 MB (note 6)
2MB SIMMs	2MB SIMMs	1MB SIMMs	1MB SIMMs	6 MB
2MB SIMMs	2MB SIMMs	2MB SIMMs	2MB SIMMs	8 MB
4MB SIMMs	4MB SIMMs	-----	-----	8 MB (note 7)
1MB SIMMs	1MB SIMMs	4MB SIMMs	4MB SIMMs	10 MB
4MB SIMMs	4MB SIMMs	2MB SIMMs	2MB SIMMs	12 MB
4MB SIMMs	4MB SIMMs	4MB SIMMs	4MB SIMMs	16 MB
8MB SIMMs	8MB SIMMs	-----	-----	16 MB (note 8)
8MB SIMMs	8MB SIMMs	1MB SIMMs	1MB SIMMs	18 MB
2MB SIMMs	2MB SIMMs	8MB SIMMs	8MB SIMMs	20 MB
4MB SIMMs	4MB SIMMs	8MB SIMMs	8MB SIMMs	24 MB
8MB SIMMs	8MB SIMMs	8MB SIMMs	8MB SIMMs	32 MB
16MB SIMMs	16MB SIMMs	1MB SIMMs	1MB SIMMs	34 MB
2MB SIMMs	2MB SIMMs	16MB SIMMs	16MB SIMMs	36 MB
16MB SIMMs	16MB SIMMs	4MB SIMMs	4MB SIMMs	40 MB
16MB SIMMs	16MB SIMMs	8MB SIMMs	8MB SIMMs	48 MB
16MB SIMMs	16MB SIMMs	16MB SIMMs	16MB SIMMs	64 MB
32MB SIMMs	32MB SIMMs	1MB SIMMs	1MB SIMMs	66 MB
32MB SIMMs	32MB SIMMs	2MB SIMMs	2MB SIMMs	68 MB
4MB SIMMs	4MB SIMMs	32MB SIMMs	32MB SIMMs	72 MB
8MB SIMMs	8MB SIMMs	32MB SIMMs	32MB SIMMs	80 MB
32MB SIMMs	32MB SIMMs	16MB SIMMs	16MB SIMMs	96 MB
32MB SIMMs	32MB SIMMs	32MB SIMMs	32MB SIMMs	128 MB
Notes:	1.	JEDEC standard 36-bit, fast-page mode SIMM modules required.

2.	J0550 and J0551 socket sites are SIMM Bank 0. Same size and type SIMMs are required.

3.	J0650 and J0651 socket sites are SIMM Bank 1. Same size and type SIMMs are required.

4.	All possible memory combinations NOT shown. SIMM sizes obviously can be mixed.

5.	Similar memory design on the optional memory module, but with eight SIMM sockets.

6.	Standard default configuration for the Desktop platform.

7.	Standard default configuration for the Xpress/MX Premium server and Xpress/LX Mainstream server.

8.	Available default configuration for the Xpress/LX Mainstream server and Xpress/MX Premium server.

The following tables list SIMMs that are known to be compatible with the specified Intel platforms. SIMMs that are not listed also should function properly as long as their specifications are compatible with the devices listed below. In general, SIMM devices that are faster than those specified for a given platform will work although no extra performance will be realized.  The SIMM devices shown are categorized according to three levels of qualification:

1.  Intel Tested and Approved:  The SIMM has been electrically tested by Intel engineering and is known to be compatible with the Xpress server basebaord, Xpress parity memory module, or Xpress ECC memory module.  Rigerous envinronmental testing, voltage margin, shock, and vibration testing were conducted on these SIMM devices.  In addition, the vendor has met or exceeded Intel's product change, quality control, and availablity requirements.  The SIMM is on the Intel Approved Manufacturing  List.

2.  Intel Tested:  The SIMMs have been analyzed by the data sheet and have been electrically tested.  A small sample ( normally 12 SIMMs) have been tested by Intel engineering across voltage and temperature margins on the Xpress baseboard and/or memory modules.  The SIMMs are not on the Apporved Manufacturing list, but  are considered appropriate for use in the Xpress server system.

3.  Customer Tested:  The SMM has been electrically tested by an OEM customer and is reported to be compatible  with the Xpess server platform system.

Intel recommends that SIMMs listed as (1) Intel Approved and Tested or (2) Intel Tested be used to ensure reliable system operation. SIMMs not listed or listed as (3) Customer Tested can be used; but, in the event of unreliable system operation, the SIMMs should be replaced with SIMMs tested by Intel (1 or 2) to determine whether the SIMMs are causing the problem.

IMPORTANT NOTE

SIMM devices with gold contacts should NOT be placed into SIMM sockets with tin-lead contacts or vice-versa. Mixing dissimilar metal contact types has been shown to result in unreliable memory operation. For more information, see FaxBack document 4229.  Intel Corporation makes no warranty for the use of its products and assumes no responsibility for any errors which may appear in this document nor does it make a commitment to update the information contained herein.  Intel Corporation retains the right to make changes to these specifications at any time, without notice.  Product and corporate names listed in this document may be trademarks of their respecitive companies.

Vendor Contacts (phone numbers are provided for convenience and may change without notice. Current as of 1/95).

Centon	516-471-7700

Fujitsu	408-922-9000*

Enhanced Technology	818-343-3066

Hyundai	408-473-9200

Kelly Micro Systems	800-854-3900

Micron	208-368-3900*

MPM	800-899-4676

NEC	415-960-6000*

Samsung	408-954-7000*

Simple Technologies	714-558-1120

Smart Modular	510-623-1231

Texas Instruments	214-644-5580

Toshiba	503-629-0818*

*ask for the number of a representative in your area


Intel Tested and Approved SIMM Vendor List

Baseboard and BXMEM0  256K X 36 (1MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Samsung	1	KMM536256AW-7
Samsung	1	KMM536256B-7 / 8	Obsolete
Texas Instruments	1	TM256KBK36B-70 /80	Obsolete
Texas Instruments	1	TM256KBK36C-70 / 80	Obsolete
Toshiba Corp.	1	THM362500AS-70 / 80	Obsolete
Baseboard and  BXMEM0  512K X 36 (2MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Samsung	1	KMM536512AW-7
Samsung	1	KMM536512B-7	Obsolete
Samsung	1	KMM536512C-7	Obsolete
Samsung	1	KMM536512C-8	Obsolete
Texas Instruments	1	TM512LBK36B-80	Obsolete
Toshiba Corp.	1	THM365120AS-70 / 80	Obsolete
NEC Electronics, Inc.	1	MC424512A36BA-80	Obsolete
NEC/World Products Inc	1	MC424512A36BA-80	Obsolete
Fujitsu	1	MB85337-80PS	Obsolete
Baseboard, BXMEM0, or BXECCMEM0 1M X 36 (4MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Fujitsu Ltd.	1	MB85323A-70	ECC Compatible
Hyundai	1	HYM536100AM-70	ECC Compatible
Samsung	1	KMM5361000B-70	ECC Compatible
Samsung	1	KMM5361003C-70	ECC Compatible
Smart Tech	1	SMI5361000-7	ECC Compatible
Texas Instruments	1	TM124MBK36A-70	ECC Compatible
Texas Instruments	1	TM124MBK36B-70	ECC Compatible
Texas Instruments	1	TM124MBK36R-70	ECC Compatible
Fujitsu Ltd.	1	MB85346-80PS/70PS	Obsolete
Hyundai	1	HYM536100AM-70NT
NEC Electronics, Inc.	1	MC421000A36BE-80
NEC Electronics, Inc.	1	MC421000A36BJ-80 /70
Samsung	1	KMM5361000B-8/7	Obsolete
Samsung	1	KMM5361003-8/7	Obsolete
Samsung	1	KMM5361003C-7
Smart Modular Tech.	1	SMI5361000-8
Texas Instruments	1	TM124MBK36A-80	Obsolete
Texas Instruments	1	TM124MBK36B-80	Obsolete
Texas Instruments	1	TM124MBK36R-80	Specify Tin-lead
Texas Instruments	1	TM124MBK36T-70	Specify Tin-lead
Toshiba Corp.	1	THM361020AS-80
Baseboard, BXMEM0, or BXECCMEM0 2M X 36 (8MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Micron Tech.	1	MT18D236M-8	ECC Compatible
Toshiba	1	THM362020AS-70	ECC Compatible
Smart Tech	1	SMI5362000-7	ECC Compatible
Texas Instruments	1	TM248MBK36R-70	ECC Compatible
Toshiba Corp.	1	THM362040AS-70/80	ECC Compatible
Samsung	1	KMM5362000B-7	ECC Compatible
Samsung	1	KMM5362003B-7	ECC Compatible
Samsung	1	KMM5362003B-8	ECC Compatible
Samsung	1	KMM5362003C-7	ECC Compatible
Samsung	1	KMM5362003C-8	ECC Compatible
Micron Tech.	1	MT18D236M-7	Obsolete
Micron Tech.	1	MT24D236M-7
Micron Tech.	1	MT24D236M-8
Samsung	1	KMM5362000B-8 /7
Samsung	1	KMM5362000B1-7	Obsolete
Samsung	1	KMM5362000B2-8 /7	Obsolete
Samsung	1	KMM5362000A-8	Tall module (29mm)
Smart Modular Technologies	1	SMI5362000-8/7	DRAM s used;  Micron, Hyundai,  or Fujitsu
Toshiba Corp.	1	THM362020S-80*	Tall module (29mm)
Baseboard, BXMEM0, or BXECCMEM0 4M X 36 (16MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Texas Instruments	1	TM497MBK36Q-70	ECC  Compatible
Samsung	1	KMM5364100A-7	Use date code > 9423
Samsung	1	KMM5364100-7	Use date code > 9423
Micron	1	MT12D436M-7	Use date code > 9426
Hitachi	1	HB56D436BR-70	ECC Compatible
NEC Electronics, Inc	1	MC424000A36BE-7	ECC Compatible
Baseboard, BXMEM0, or BXECCMEM0 8M X 36 (32MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Hyundai	1	HYM536810M-60	ECC Compatible
Smart Modular Tech	1	SMI5368000-7	ECC Compatible
Samsung	1	KMM5368100A-7	ECC Compatible
Samsung	1	KMM5368100A1-7 (Height = 1.25 ")	ECC Compatible
Samsung	1	KMM5364199A-7	Use date code > 9423
Samsung	1	KMM5364100A1-7	Use date code > 9423
Micron	1	MT24D836M-7	Use date code > 9426
Mitsubishi	1	MH8M36NAJ-7 (Height = 1.30")	ECC Compatible
Smart  Modular Tech	1	SMI5368000-7	ECC Compatible


Intel Tested or Customer Tested SIMM Vendor List

BXMEM0  1MB, 2MB, 4MB, 8MB, 16MB, and 32MB SIMMS

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	SIMM Size	Comments
Texas Instruments	2	TM248NBK36T-70/80	8MB
NEC	2	MC422000A36BJ-70/80	8MB
Enhanced Memory Products	2	SCO486DT-70	16MB
Kelly Mico Systems	2	KN116000/XP	16MB
Simple Technologies	2	STI-XPRESS/16	16MB
IBM	2	IBM11D4480B-70	16Mb	ECC on SIMM
Kelly Micro Systems	2	KNI32000/XP	32MB
Simple Technologies	2	STI-XPRESS/32	32MB
Centon Elentronics	3	CE8036LT-7	1MB
Centon Elentronics	3	CE25636LT-7	1MB
Centon Electronics	3	CE51236LT- 7 / 8	2MB
Micron Technology	3	MT20D51236M-7 / 8	2MB	Obsolete
Micron Technology	3	MT18D51236M-7 / 8	2MB	Obsolete
Centon Electronics	3	CE1036LT-7	4MB
MPM	3	1MX3670T	4MB
Fujitsu Ltd.	3	MB85323-70PS	4MB	Data sheet verified
Simple Technologies	3	STI361000-70T	4MB	Data sheet verified
Fujitsu Ltd.	3	MB85347A-70PS	8MB	Data sheet verified
Simple Technologies	3	STI362000-70T	8MB	Data sheet verified
MPM	3	2MX3670T	8MB
MPM	3	4MX3670T	16MB
MPM	3	8MX3670T	32MB
Centon	3	CE8036LT-7	32MB


Intel Tested SIMM Vendor List for BXECCMEM0 Only

512K X 36 (2MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Samsung Corning Co.	2	KMM536512AW-7 /8
Samsung Corning Co.	2	KMM536512C-7 /8
Texas Instruments	2	TM512LBK36B-80L	specify tin-lead
Toshiba Corp.	2	THM365120AS-70 / 80
1M X 36 (4MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Fujitsu Ltd.	1	MB85323A-70
Hyundai	1	HYM536100AM-70
Samsung	1	KMM5361000B-70
Samsung	1	KMM5361003C-70
Smart Tech	1	SMI5361000-7
Texas Instruments	1	TM124MBK36A-70
Texas Instruments	1	TM124MBK36B-70
Texas Instruments	1	TM124MBK36R-70
Fujitsu Ltd.	2	MB85346A-80PS/70PS
Fujitsu Ltd.	2	MB85323A-70PS
Fujitsu Ltd.	2	MB85323-70PS
Toshiba Corp.	2	THM361020AS-80 /70
Micron Tech.	2	MT120136M -7
NEC Electronics, Inc.	2	MC-421000A36BE-70
NEC Electronics, Inc.	2	MC-421000A36BJ-70
Samsung Corning Co.	2	KMM5361000B-8/7	Obsolete
Samsung Corning Co.	2	KMM5361000C-8/7
Samsung Corning Co.	2	KMM5361003B-7	Obsolete
Smart Modular Tech. Inc.	2	SMI5361000-8/7	DRAM s used;  Micron, Hyundai,  or Fujitsu
Texas Instruments	2	TM124MBK36R-70/80	specify tin-lead
Texas Instruments	2	TM124MBK36T-70/80	specify tin-lead
Hyundai	2	HYM536100AM-70NT
Goldstar	2	GMM7361000BS-70
2M X 36 (8MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Micron Tech.	1	MT18D236M-8
Smart Tech	1	SMI5362000-7
Texas Instruments	1	TM248NBK36R-70
Toshiba Corp.	1	THM362040AS-70/80
Samsung	1	KMM5362000B-7
Samsung	1	KMM5362003B-7
Samsung	1	KMM5362003B-8
Samsung	1	KMM5362003C-7
Samsung	1	KMM5362003C-8
Fujitsu Ltd.	2	MB85347A-70PS
Fujitsu Ltd.	2	MB85347A-70PS
Micron Tech.	2	MT24D236M-7	Obsolete
Micron Tech.	2	MT24D236M-8
Samsung	2	KMM5362000B-8
Samsung	2	KMM5362000B2-7/8	Obsolete
Smart Modular Tech. Inc.	2	SMI5362000B-8	DRAM s used;  Micron, Hyundai,  or Fujitsu
Texas Instruments	2	TM248NBK36R-80	specify tin-lead
Texas Instruments	2	TM248NBK36T-70 /80	specify tin-lead
Toshiba Corp.	2	THM362020AS-70	Obsolete
NEC	2	MC-422000A36BJ-70
Hyundai	2	HYM536200AM-70NT
Goldstar	2	GMM7362000BS-70
4M X 36 (16MB per SIMM)

Tin-lead contacts

Vendor	Qual	Vendor Part Number	Comments
Samsung	1	KMM5364100A-7	Use date code > 9423
Samsung	1	KMM5364100-7	Use date code > 9423
Micron	1	MT12D436M-7	Use date code > 9426
Hitachi	1	HB56D436BR-70
NEC Electronics, Inc	1	MC424000A36BE-7
Texas Instruments	1	TM497MBK36Q-70	Specify Tin-lead
Enhanced Memory Products	2	SCO486DT-70	DRAM s used;  Micron, Hyundai,  or Fujitsu
Hyundai	2	HYM536410M-70
Kelly Micro Systems	2	KNI16000/XP	DRAM s used;  Micron, Hyundai,  or Fujitsu
8M X 36 (32MB per SIMM)

Tin-lead contacts

Vendor	Qual.	Vendor Part Number	Comments
Hyundai	1	HYM536810M-60
Micron	1	MT24D836M-7	Use date code > 9426
Smart Modular Tech	1	SMI5368000-7
Samsung	1	KMM5368100A-7
Samsung	1	KMM5364199A-7	Use date code > 9423
Samsung	1	KMM5364100A1-7	Use date code > 9423
Toshiba	1	THM3680G0BS-60
Samsung	1	KMM5368100A1-7 (Height = 1.25")	Tall SIMM
Mitsubishi	1	MH8M36NAJ-7 (Height = 1.30")	Tall SIMM
Kelly Micro Systems	2	KNI32000/XP	DRAM s used;  Micron, Hyundai,  or Fujitsu
Texas Instruments	2	TM382PBK36B-70	specify tin-lead
NEC	2	MC428000A36BH-80


Known Incompatible SIMMs on the Baseboard, BXMEM0, or BXECCMEM0 Memory Modules

Manufacturer	Part Number	SIMM Type	Size	Reason
Toshiba	THM368020S-70	8Mx36	32MB	DRAM Addr. Glitch
Toshiba	THM368020AS-70	8Mx36	32MB	DRAM Addr. Glitch
NEC	MC428000A36BJ-70	8Mx36	32MB	Failed Spec. Review and Testing
Micron Tech	MT24D836M-7	8Mx36	32MB	Cin(RAS) > 42PF
Micron Tech	MT12D436M-7	4Mx36	16MB	Cin(RAS) > 42PF
Toshiba	THM3640AS-60	4MX36	16MB	Quad density pin out
Toshiba	THM364020S-70	4Mx36	16MB	DRAM Addr. Glitch
Toshiba	THM364020S-70/80	4Mx36	16MB	DRAM Addr. Glitch
Toshiba	THM364080AS-70	4Mx36	16MB	DRAM Addr. Glitch
Mitsubishi	MH2M36ANCJ-8	2Mx36	8MB	Trp>60ns; Tcyc>150ns
NEC	MC441000A36-80	2Mx36	8MB	Trp>60; Tcyc>150
NEC	MC422000A36BJ-80	2Mx36	8MB	Trp>60ns; Tcyc>150ns
NEC	MC422000A36B-70	2Mx36	8MB	Failed Spec. Review and Testing
Siemens	HYM362120GS-70	2Mx36	8MB	Failed Testing @ 0 C / 4.75v
NEC	MC421000A36Bx-80	1Mx36	4MB	Trp>60ns; Tcyc>150ns
NEC	MC441000A36Bx-80	1Mx36	4MB	Trp>60ns:Tcyc>150ns
Fujitsu	MB85346A-70	1Mx36	4MB	Failed  Testing @ 0 C / 5.25v
Mitsubishi	MH1M36ASDJ-8	1Mx36	4MB	Trp>60ns; Tcyc>150ns
Samsung	KMM53612AW-7	512Kx36	2MB	Noise on RAS/CAS/WE
Samsung	KMM53612AW-8	512Kx36	2MB	Noise on RAS/CAS/WE
NEC	MC44512A36Bx-80	512Kx36	2MB	Trp>60ns; Tcyc>150ns
NEC	MC42512A36Bx-80	512Kx36	2MB	Trp>60ns; Tcyc>150ns
NEC	MC44256A36B-80	512Kx36	2MB	Trp>60ns;Tcyc>150ns
NEC	MC42256A36Bx-80	256Kx36	1MB	Trp>60ns;Tcyc>150ns
While the Xpress Bus Interface is capable of transferring data to SIMM speeds ranging between 50 ns and 80 ns, currently the Xpress-to-EISA Controller (MECA) and Xpress DRAM Controller (RCA) are not able to detect the various SIMM speeds. Since the current 72-pin SIMM presence detection bits are limited to two pins, they support only four types of SIMMs (1MB, 2MB, 4MB, and 8MB SIMMs). JEDEC has not yet ratified signal definitions for 50 ns DRAM parts, 4Mb x 36 or 8Mb x 36 DRAM technology. As 16M-bit DRAMs become available, the SIMM presence detection scheme for the 16 MB and 32 MB SIMMs will replace those for 1 MB and 2 MB. For the 16 MB and 32 MB SIMMs to be used, there must be a special detection scheme. Currently there is no standard, but there is a JEDEC proposal. Until this new standard is recognized by the memory manufacturers, Xpress Desktop and Deskside systems will support 80 ns SIMM single- and double-sided modules in accordance with the existing JEDEC standard. Table A-4 describes the level for each Presence Detect pin on the SIMM using the current JEDEC Proposal:

	SIMM Speed Detection Bits		SIMM Size Detection Bits
SIMM Capacity	Pin 70 (PD3)	Pin 69 (PD2)	Pin 68 (PD1)	Pin 67 (PD0)	Pin 66 (Reserved)
1 MB	GND	NC	NC	GND	NC
2 MB	GND	NC	GND	NC	NC
4 MB	GND	NC	GND	GND	NC
8 MB	GND	NC	NC	NC	NC
16 MB	GND	NC	NC	GND	GND
32 MB	GND	NC	GND	NC	GND
Table A-4. Proposed JEDEC standard SIMM Pinout.

Notes:	1. Pin 66 should be a No-Connect (NC) on the SIMM. This pin is currently set by changing the SIMM0 or SIMM1 jumpers on the Xpress baseboard. This pin definition is following an IBM proposal to the JEDEC committee.

 	2.	Pins 69 and  70 are electrically connected on the baseboard and each SIMM module is required to have one or both of these pins connected to ground. For example, 60 ns Toshiba SIMMs do not have either of these pins grounded and will not work in Xpress.

3. NC pins must be tied to Vcc through pull-up resistors.


Video DRAM Memory

Video DRAM memory can be upgraded using four 256K x 4, 60 ns, DIP components. While some DRAM parts rated at 70 ns will function in Xpress platforms, Intel does not warrant the use of these 70 ns parts, or assume any liability concerning the use of these parts. Also note that the Texas Instruments DRAM part has a test function (pin 5) which must be disconnected or biased at a voltage greater than Vcc to be used in the Xpress system baseboard.

DRAM Size	Vendor	DRAM Part #
256K x 4 256K x 4 256K x 4 256K x 4 256K x 4 256K x 4 256K x 4	Fujitsu Hitachi NEC Samsung Intel Toshiba Texas Instruments	MB81C4256AP-60 HM51425HP-6 uP0424256C-60 KM44C256BP-6 P21014-06 TC514256AP-60 TMS44C256N-60
Table A-6. Recommended Video DRAM Vendors for Xpress Platforms.


XRAID4 Cache memory

The XRAID4 SCSI disk controller is based on the Intel I960 32-bit RISC processor. This processor controls all functions of the SCSI controller, SCSI/EISA bus transfers, RAID processing, error recovery and disk cache memory accesses. The disk cache memory on the XRAID4 add-in card can be configured to be 4, 16, or 64 MB using four 70 ns, x9 SIMMs.

SIMM Size	Vendor	SIMM Part #	Total Disk Cache Size
16M x 9, 70 ns	Hyundai	HYM591600M	64 MB
4M x 9, 70ns	Samsung	KMM594000A-7	16 MB
4M x 9, 70ns	Hyundai	HYM594000B-70	16 MB
4M x 9, 70ns	Mitsubishi	MH4M09A0J-7	16 MB
4M x 9, 70ns	Toshiba	THM94000S/L-7	16 MB
1M x 9, 70ns	Mitsubishi	MH1M9B0DJA-7	4 MB
1M x 9, 70ns	Samsung	KMM591000B-7	4 MB
1M x 9, 70ns	Hyundai	HYM591000B-70	4 MB
Table A-7. Recommended XRAID4 Disk Cache SIMMs.


Readme Files

Video Drivers V4.3B for Windows

Video Drivers V4.3A for DOS


Video Drivers V4.3B for Windows

The following is the "readme.txt" file found on the Video Drivers V4.3B for Windows 3.1 disk, copyright Western Digital Corp. Intel part number 634007-001

 Western Digital Accelerator Card for Windows

 Windows 3.1 Driver List

INSTALLATION INSTRUCTIONS

Place the Western Digitial driver diskette in drive A:. Under Windows Program

Manager, click on "File" and then on "Run".  Type  "A:\WDSETUP" for the

Command Line and then click on OK.

From WDSETUP program, set the Driver Directory to A.  Select the desired

drivers and click on "Add Driver".  Close this Window when it is done.

Then chose the desired driver resolution and click on "Restart Windows".

To change the drivers at later date, click on the Western Digital icon,

chose a new driver, and click on "Restart Windows".

DISK FILE LIST

The following is a list of the files on this disk. These files are in a

compressed format and are intented for use with WDSETUP or Microsoft's setup

programs. Any files which are installed without WDSETUP or Microsoft's setup

must be decompressed with the Microsoft Utility Expand.

Windows 3.1 Drivers

WD640_4.DRV     640x480 16-color

MMWD480.DRV     640x480 256-color(512K)

WD31_8.DRV      640x480 256-color(Small Font)

WD31_8.DRV      640x480 256-color(Large Font)

WD800_4.DRV     800x600 16-color

PVGA600.DRV     800x600 256-color(512K)

WD31_8.DRV      800x600 256-color(Small Font)

WD31_8.DRV      800x600 256-color(Large Font)

WD1024_4.DRV    1024x768 16-color

WD31_8.DRV      1024x768 256-color(Small Font)

WD31_8.DRV      1024x768 256-color(Large Font)

WD1280_4.DRV    1280x1024 16-color

WD960_4.DRV     1280x960  16-color

P32K480.DRV     640x480 32K-color

P32K600.DRV     800x600 32K-color

P64K480.DRV     640x480 64K-color

P64K600.DRV     800x600 64K-color

WD31_24.DRV     640x480 16M-color

WDSETUP Files

WDSETUP.BIN

WDSETUP.EXE

WDSETUP.HLP

W1311H.INF

W1315H.INF

W1315T.INF

W1311T.INF

W1311S.INF

W1315S.INF

Microsoft Setup Files

OEMDISK1

OEMSETUP.INF

VGALOGO.LGO

VGALOGO.RLE

Windows 3.1 Fonts

8514FIX.FON

8514OEM.FON

8514SYS.FON

CGA40WOA.FON

CGA80WOA.FON

COURE.FON

COURF.FON

DOSAPP.FON

EGA40WOA.FON

EGA80WOA.FON

SERIFE.FON

SERIFF.FON

SMALLE.FON

SMALLF.FON

SSERIFE.FON

SSERIFF.FON

SYMBOLE.FON

SYMBOLF.FON

VGAFIX.FON

VGAOEM.FON

VGASYS.FON

Windows 3.1 support files

PVGA.GR2

V7VGA.GR2

VDDVGA.386

   Licensed by Western Digital for use by its customers only.

   Copyright (C) 1989-1993 Western Digital Corporation. All rights reserved.

   Copyright (C) 1985-1993 Congruent Corporation. All rights reserved.

   Copyright (C) 1985-1993 Microsoft Corporation. All rights reserved.


Video Drivers V4.3A for DOS

The following is the "readme.txt" file found on the Video Drivers V4.3A for DOS disk, copyright Western Digital Corp. Intel part number 620520-001

       +------------------------------------------------------------+

       ¦   Super-VGA Card Readme File - Version 4.3     Feb, 1993   ¦

       +------------------------------------------------------------+

 The following drivers and utilities are contained on the DOS install disk.

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦DRIVER NAME           ¦

¦----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386          ¦Release 12     ¦640x480x256    ¦rcp12gen.exp          ¦

¦                      ¦               ¦800x600x16     ¦                      ¦

¦                      ¦               ¦800x600x256    ¦                      ¦

¦                      ¦               ¦1024x768x16    ¦                      ¦

¦                      ¦               ¦1024x768x256   ¦                      ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386 Non D.L. ¦Release 11     ¦640x480x256    ¦11p6168.exp           ¦

¦ AutoShade 386        ¦Version 2      ¦640x480x256/32K¦11p6168.exp           ¦

¦ 3D Studio            ¦               ¦640x480x256/32K¦11p6168.exp           ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386 Non D.L. ¦Release 11     ¦800x600x256    ¦11p8188.exp           ¦

¦ AutoShade 386        ¦Version 2      ¦800x600x256/32K¦11p8188.exp           ¦

¦ 3D Studio            ¦               ¦800x600x256/32K¦11p8188.exp           ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386 Non D.L. ¦Release 11     ¦640x480x256    ¦11pshv68.exp          ¦

¦ AutoShade 386        ¦Version 2      ¦640x480x256    ¦11pshv68.exp          ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386 Non D.L. ¦Release 11     ¦800x600x256    ¦11pshv88.exp          ¦

¦ 0utoShade 386        ¦Version 2      ¦800x600x256    ¦11pshv88.exp          ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386 Non D.L. ¦Release 11     ¦1024x768x256   ¦11pshv18.exp          ¦

¦ AutoShade 386        ¦Version 2      ¦1024x768x256   ¦11pshv18.exp          ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386          ¦               ¦               ¦                      ¦

¦     Display List     ¦Release 11     ¦800x600x16     ¦11pdlv84.exp          ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386          ¦               ¦               ¦                      ¦

¦     Display List     ¦Release 11     ¦800x600x256    ¦11pdlv88.exp          ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386          ¦               ¦               ¦                      ¦

¦     Display List     ¦Release 11     ¦1024x768x16    ¦11pdlv14.exp          ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoCAD 386          ¦               ¦               ¦                      ¦

¦     Display List     ¦Release 11     ¦1024x768x256   ¦11pdlv18.exp          ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoShade            ¦Version 1      ¦640x400x256    ¦rd400.exe             ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoShade            ¦Version 1      ¦640x480x256    ¦rd480.exe             ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoShade            ¦Version 1      ¦800x600x256    ¦rd800.exe             ¦

+----------------------+---------------+---------------+----------------------¦

¦ AutoShade            ¦Version 1      ¦1024x768x256   ¦rd1024.exe            ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ Cadvance             ¦3.0            ¦640x480x256    ¦gsvga.drv             ¦

+----------------------+---------------+---------------+----------------------¦

¦ Cadvance             ¦3.0            ¦800x600x16     ¦gs800.drv             ¦

+----------------------+---------------+---------------+----------------------¦

¦ Cadvance             ¦3.0            ¦1024x768x16    ¦gs102416.drv          ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ Generic CADD         ¦Level 3        ¦640x400x256    ¦p640x400.vgd          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Generic CADD         ¦Level 3        ¦640x480x256    ¦p640x480.vgd          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Generic CADD         ¦Level 3        ¦800x600x16     ¦para800.vgd           ¦

+----------------------+---------------+---------------+----------------------¦

¦ Generic CADD         ¦Level 3        ¦800x600x256    ¦p800x600.vgd          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Generic CADD         ¦Level 3        ¦1024x768x16    ¦p1024x16.vgd          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Generic CADD         ¦Level 3        ¦1024x768x256   ¦p1024xff.vgd          ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ Lotus 1-2-3          ¦2,2.1,2.01,2.2 ¦640x480x16     ¦sp1_480s.drv          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus 1-2-3          ¦2,2.1,2.01,2.2 ¦800x600x16     ¦sp1_600s.drv          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus 1-2-3          ¦2,2.1,2.01,2.2 ¦1024x768x16    ¦sib2vga.drv(8x9 font) ¦

¦                      ¦               ¦               ¦sib3vga.drv(9x13 font)¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus 1-2-3          ¦2,2.1,2.01,2.2 ¦132 Columns    ¦sp0_25s.drv(132x25)   ¦

¦                      ¦               ¦               ¦sp0_44s.drv(132x44)   ¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus 1-2-3          ¦3.1            ¦800x600x16     ¦l13v600.dld           ¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus 1-2-3          ¦3.1            ¦1024x768x16    ¦l13v768.dld           ¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus Symphony       ¦1.1,1.2,2.0    ¦640x480x16     ¦sp1_480s.drv          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus Symphony       ¦1.1,1.2,2.0    ¦800x600x16     ¦sp1_600s.drv          ¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus Symphony       ¦1.1,1.2,2.0    ¦1024x768x16    ¦sib2vga.drv(8x9 font) ¦

¦                      ¦               ¦               ¦sib3vga.drv(9x13 font)¦

+----------------------+---------------+---------------+----------------------¦

¦ Lotus Symphony       ¦1.1,1.2,2.0    ¦132 Columns    ¦sp0_25s.drv(132x25)   ¦

¦                      ¦               ¦               ¦sp0_43s.drv(132x43)   ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ PCAD                 ¦Level 2        ¦800x600x16     ¦dwdpvga.drv           ¦

+----------------------+---------------+---------------+----------------------¦

¦ PCAD                 ¦Level 2        ¦1024x768x16    ¦dpvga1k.drv           ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ VersaCAD Design      ¦5.4,6.0,7.0    ¦640x480x16     ¦vc2_wdi.com           ¦

¦                      ¦               ¦800x600x16     ¦                      ¦

¦                      ¦               ¦1024x768x16    ¦                      ¦

¦                      ¦               ¦1280x960x16    ¦                      ¦

¦                      ¦               ¦1280x1024x16   ¦                      ¦

+----------------------+---------------+---------------+----------------------¦

¦ VersaCAD Design      ¦5.4,6.0,7.0    ¦640x400x256    ¦pvgaff.exe            ¦

¦                      ¦               ¦640x480x256    ¦                      ¦

¦                      ¦               ¦800x600x256    ¦                      ¦

¦                      ¦               ¦1024x768x256   ¦                      ¦

+----------------------+---------------+---------------+----------------------¦

¦ VersaCAD 386         ¦5.4,6.0,7.0    ¦640x480x16     ¦vc3_wdi.com           ¦

¦                      ¦               ¦800x600x16     ¦                      ¦

¦                      ¦               ¦1024x768x16    ¦                      ¦

¦                      ¦               ¦1280x960x16    ¦                      ¦

¦                      ¦               ¦1280x1024x16   ¦                      ¦

+----------------------+---------------+---------------+----------------------¦

¦ VersaCAD 386         ¦5.4,6.0,7.0    ¦640x400x256    ¦pvga256p.exe          ¦

¦                      ¦               ¦640x480x256    ¦                      ¦

¦                      ¦               ¦800x600x256    ¦                      ¦

¦                      ¦               ¦1024x768x256   ¦                      ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ Word                 ¦v5.5           ¦800x600x16     ¦vga.gsd               ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ WordPerfect          ¦v5.0           ¦800x600x16     ¦wdpvga1.wpd           ¦

+----------------------+---------------+---------------+----------------------¦

¦ WordPerfect          ¦v5.0           ¦1024x768x16    ¦wdpvga2.wpd           ¦

+----------------------+---------------+---------------+----------------------¦

¦ WordPerfect          ¦v5.1           ¦1024x768x16    ¦wdpvga3.vrs           ¦

+-----------------------------------------------------------------------------+

+-----------------------------------------------------------------------------+

¦ PRODUCT              ¦VERSION        ¦RESOLUTION     ¦NAME                  ¦

¦----------------------+---------------+---------------+----------------------¦

¦ Microstation         ¦v4.0.3         ¦640x480x16/256 ¦mglc31.exp            ¦

¦                      ¦               ¦800x600x16/256 ¦                      ¦

¦                      ¦               ¦1024x768x16/256¦                      ¦

¦                      ¦               ¦1280x960x16    ¦                      ¦

¦                      ¦               ¦1280x1024x16   ¦                      ¦

+-----------------------------------------------------------------------------+

 The following utilities are contained on the DOS install disk.

+-----------------------------------------------------------------------------+

¦ UTILITY              ¦ DESCRIPTION                                          ¦

¦----------------------+------------------------------------------------------¦

¦ VESA.EXE             ¦ TSR for interfacing to VESA standard                 ¦

+----------------------+------------------------------------------------------¦

¦ VGAMODE.EXE          ¦ Mode switching utility                               ¦

+----------------------+------------------------------------------------------¦

¦ WDANSI.SYS           ¦ ANSI compatible driver for Paradise video card       ¦

+-----------------------------------------------------------------------------+


Novell Certifications

The full Certifications can be found on Faxback Documents 4210, 4211, 4223

Xpress Deskside 50MHz i486DX Platform	F-1094

Xpress Desktop 50MHz i486DX2 Platform	F-1003

Xpress Deskside/MX 60MHz Pentium™ OEM Platform	F-2458

Xpress Deskside/MX 66MHz i486DX2 OEM Platform	F-1994

Xpress Deskside/MX 60MHz Pentium™ OEM Platform	F-1995

There are currently no plans to obtain certifications for Xpress with 90Mhz Pentium nor any Dual Processor module Xpress.


Frequently Asked Questions

ECC Questions

CPU Module Questions

System Questions

Windows NT Questions


ECC Questions

What are the ECC Memory Module Requirements?

Will there be an update to the ECC software for Netware 4.1?


What are the ECC Memory Module Requirements?

This information also available on FaxBack document 4268.

•	Baseboard with MECA ASIC version 3.0 (PBA 614727-0xx or 614726-0xx or later, see Baseboard Revision Summary)

•	Pentium Processor module

•	System BIOS version 1.00.16.AM0 (-C baseboards) or 1.00.16.AK0 (baseboards without SCSI)

•	ECU version 2.9

•	No memory installed on baseboard

•	SIMMs on ECC board installed in sets of four


Will there be an update to the ECC software for Netware 4.1?

No.  The software that ships with the card is an error logging utility, and the current logger works with any version of netware.


CPU Module Questions

What are the Dual Pentium Processor Module Requirements?

•	Xpress -C Baseboard (PBA 540374 or 614727)

•	Dual-processing enable PAL (p/n 615672-001) installed. This PAL is provided with the module

•	System BIOS version 1.00.16.AM0

•	Multiprocessor APIC set to 'enabled' on Page 4 of the BIOS setup

•	ECU version 2.9

•	An operating system which supports Symmetric Multi-Processing


System Questions

What is the power factor on the LX power supply?

The power factor of one of SA230-3415-226 unit tested at all full load condition (30A ON +5V ; 6A ON +12V AND 0.5A ON -12V AND -5V ) IS :

    AT 115V : 0.64

    AT 230V : 0.52


Windows NT Questions

Are there problems with intalling Windows NT on large drive partitions?

If you are installing WINDOWS NTon a system with drive partitions > 1 gigabyte,  make sure to enable Extended Translation in the SCU first.  If you depend  only on the BIOS setup, the install will fail and you'll have to do a low level format to put the  drive back into a state to reinstall Windows NT.

The following WORKS

1. Install Windows NT on 1.2 GIG hard drive with BIOS support for drives  larger than 1 GIG enabled. In the ECU, go to "Configure Computer", "View  and Edit Details", "BIOS and Device Configuration", "BIOS configuration"  and set "Extended Translation for Drives > 1 GByte" to "Enabled". Then  use the Windows NT Install to create a partition for the entire hard  drive and install from there. Note that the largest boot partition  Windows NT can handle is 4 GByte. This works.

These two things DON'T WORK

1. In the ECU, go to "Configure Computer", "View and Edit Details",  "BIOS and Device Configuration", "BIOS configuration" and set "Extended  Translation for Drives > 1 GByte" to "Disabled". Start the Windows NT  Installation process. Delete any existing partitions. Repartition the  hard drive to use the entire drive. You may be able to use all but 1 MByte of space.  Format the partition and start the install. The install  will be normal until you try to reboot to run the Graphical portion of  the install. You'll either HANG and the 000 POST code, or get a "missing  Operating System" error message.

2. After trying the #1 installation that failed, go into the ECU and  reenable the BIOS Extended Translation for drives > 1 GByte and  install Windows NT again. You may delete all existing partitions, but you cannot repartition the drive to use all of the available space. The results were the same as those in the  previous failed installation.

NOTE:    After trying items #1 and #2 above, you may boot the ECU and choose "Configure  Computer", "View and Edit Details", "Utilities", "Disk Format Utility".  Perform a low level format of the drive.  Then you able to  repartition the disk and install Windows NT successfully.


Orderable Spare Parts

616738-001	Left Drive Rail

616738-002	Right Drive Rail

Related Topics:

XPRESS  DT

XPRESS  LX

XPRESS  MX


XPRESS  DT

Product Code:  XBASE6.....

Spare Parts List

Intel Part No.	Description
XPDT451221	Speaker w/Cable
XPDT512254	Power Supply Rod
XPDT512722	Front Bezel Assembly
XPDT515524	CPU Support Rail
XPDT515529	Chassis Assembly
XPDT517090	Fan Assembly
XPDT518100	215 W Power Supply
XPDT610414	Wini Bkt, Rear
XPDT611745	Country Kit  ( US )
XPDT611747	Country Kit  ( Europe )
616738-001	Drive rail, right side
616738-002	Drive rail, left side
Rev 04,9/94


XPRESS  LX

Product Code:  XLXBASE.....

Spare Parts List

Intel Part No.	Description
XPLX202123	230 W Power Supply
XPLX507033	5.25 Filler Panel
XPLX515524	CPU Support Rail
XPLX610547	Cbl, Basebd to Host Adpt
XPLX611494	Key & Lock Assembly
XPLX611494M	Master Key & Lock Assy
XPLX611945	Sys Front Panel Board
XPLX612060	Chassis Assembly
XPLX612413	Fan Assembly
XPLX612521	Plastic Bezel Kit
XPLX612856	Country Kit  ( US )
XPLX613556	Country Kit  ( Europe )
XPLX614758	Accessory Kit
616738-001	Drive rail, right side
616738-002	Drive rail, left side
Rev 03,9/94


XPRESS  MX

Product Code:  XBASE8....

Spare Parts List

Intel Part No.	Description
XPMX201460	400 W Power Supply
XPMX201559	Fan Assembly
XPMX507033	5.25 Filler Panel
XPMX611494	Key & Lock Assembly
XPMX611494M	Key & Lock Master
XPMX515138	Chassis Assembly
XPMX515524	CPU Support Rail
XPMX516250	SCSI Cbl, Dist Bd/Drives
XPMX516260	Pwr Sup Cbl to SCSI Bd
XPMX516264	SCSI Perpheral Dist Bd
XPMX516269	Front  Pnl LCD Assembly
XPMX516332	Base Foot
XPMX610547	Cbl, Basebd to Host Adpt
XPMX612521	Plastic Bezel Kit
XPMX612937	Accessory Kit
XPMX613184	Cbl, SCSI to Disti Bd
XPMX614008	Country Kit
616738-001	Drive rail, right side
616738-002	Drive rail, left side
Rev 05,9/94


Known Errata

If using a NIC at IRQ9, Do not use Cntl-Alt-Del

Problem:  Setting a network at IRQ 9 will cause the system to hang at POST countdown number 80 when a CTRL-ALT-DEL is used to reboot the system.  This is caused by the NIC to continually interrupt the processor with no interrupt handling routine present to clear the IRQ.

Workaround:  Use the front panel reset switch to reset the system.  Do not use Cntl-Alt-Del.

Resolution:  BIOS 22 will correct this problem.  This BIOS is expected in June 95.


Introduction

Designed for the Future

Instant Time to Market


Designed for the Future

The Xpress server platforms are based on a scaleable, modular architecture which enables OEMs and custom solution providers to quickly access the latest enhancements in CPU/cache and memory technology. The Intel-designed architecture is a strobed, asynchronous memory bus created to scale for ANY Intel 32-/64-bit processor ranging from 20 to 100 MHz. The Xpress Interface Bus allows multiple processors and cache resources to reside on the same high speed bus without replacing or removing the system baseboard. Xpress server platforms support the entire range of both write-back and write-through cache architectures while still accepting a full range of Intel486™ microprocessors and Intel's 64-bit Pentium™ microprocessor.

The Xpress system baseboard integrates:

•	Two proprietary Xpress Interface Bus slots; one for a CPU module, the other for an optional memory module.

•	Super VGA video resolutions with 32,000 colors using the Western Digital WD90C31 controller

•	IDE hard disk interface which utilizes DMA transfers

•	Adaptec AIC-7770 SCSI-2 TwinChannel* controller

•	Intel 82077SL floppy controller

•	PS/2*-style keyboard connector and PS/2-style mouse connector

•	Two serial ports, a parallel port and six (or eight) available EISA bus master slots

•	System BIOS, SCSI BIOS, and Video BIOS located in Intel Flash memory

•	Mix and match tin-lead JEDEC standard 36-bit SIMMs

•	Multiple memory configurations up to 128 MB on the system baseboard

•	An optional 256 MB parity or 384 MB ECC memory module for a unprecedented 384 MB system total

This modular design offers immense computing power, fast time to market and quick configurability for OEMs, VARs and custom solution providers. By combining a high level of integration with Intel486™, IntelDX2™, IntelDX4™, and Pentium processors, the Xpress Desktop and Server platforms provide the ultimate in performance with maximum investment value.


Instant Time to Market

The 32/64-bit Xpress architecture offers upgrade options relatively unheard of in today's PC market, providing instant access to high performance i486 and OverDrive™ processors as soon as they become available, including the Pentium microprocessor. Other accessories include an EISA add-in disk controller card with dual Fast SCSI-2 channels to utilize RAID-0, RAID-1, RAID-5, RAID-6, or RAID-7 techniques for the leading operating systems. A server management product (planned availability: Q4 1994) will utilize performance tuning/network software information coupled with an add-in board and a diagnostic diskette to test every facet of the Xpress CPU, memory, and I/O subsystems. Also available are a dual Pentium processor module, an ECC memory module, and an ISA add-in server management card.

OEMs and integrators can mix a wide range of CPU modules, memory modules, system baseboards, disk controllers, and the other accessories to deliver products that exactly meet customer needs in a timely fashion − but still be able to add value when the market demands it. The Xpress Desktop, Deskside/LX and Deskside/MX server platforms are so versatile that there is no performance penalty using processors as fast as 100 MHz or when utilizing two 64-bit Pentium microprocessors in a Symmetric Multiprocessor (SMP) design.


Xpress Scaleable Architecture

The Xpress Interface Bus supports frequency independent 32-/64-bit CPU modules, optional memory modules and onboard SIMM memory. The memory logic controls the CPU address/data lines, 64-bit memory cycles, secondary cache cycles, and EISA bus snoop cycles. Most significantly, the Xpress architecture allows the CPU logic to utilize the efficient Intel write-back mode cache controller and high speed SRAM cache in conjunction with EISA bus master snoop cycles. A maximum of 128 data bits may be transferred across the memory bus during a single burst read or burst write cycle. By using standard JEDEC-21C, fast-page 80ns SIMMs, the sustainable transfer rates for burst read/writes are 89 MB/second and 80 MB/second respectively. With a theoretical transfer rate of 133 MB/second, the architecture has plenty of headroom for future Intel microprocessors.

The Xpress Interface Bus supports six memory partitions: two on the system baseboard and four on the optional memory module. The ECC memory module supports all six memory partitions, thus disabling the two partitions on the baseboard. Each memory partition consists of two SIMM sockets. The partitions support SIMM sizes of 1, 2, 4, 8, 16 and 32 MB. Therefore, the maximum partition size is 64 MB and the maximum memory size is 384 MB (using six partitions). The Xpress Interface Bus permits mixing SIMM sizes in the partitions, as long as the SIMMs comply with the JEDEC-21C memory standard, which includes identification bits for 1, 2, 4, 8, 16, and 32 MB SIMMs. Because the 16 and 32 MB SIMM identification encoding bits were not yet a JEDEC standard when the Xpress baseboard was introduced over three years ago, a jumper is provided for each of the banks on the baseboard and parity memory module for these higher density SIMMs. The ECC memory module automatically senses the SIMM size and does not require any jumper changes. The total system memory partition is determined by scanning the identification bits during system boot or hardware reset.

The Xpress Interface Bus does not incorporate a full 64-bit data path. Instead, the Xpress server architecture uses an ingenious method of time division, multiplexing 64-bit data across the dedicated 32-bit memory bus to the 64-bit DRAMs. The architecture ensures compatibility with 64-bit Pentium processor modules while optimizing the performance of the 32-bit Intel486 processor. A study found only a 1% to 6% difference between the performance of a dedicated 64-bit address/data path and the interleaved 32-bit Xpress Interface Bus. Intel simulated multiple 64-bit memory transfers using the 64-bit Pentium processor module on the 32-bit Xpress Interface Bus with a 256 KB writeback secondary cache.

Although the Xpress Interface Bus supports either parity or ECC (Error Correction Circuitry) memory, the system baseboard SIMM resource supports only parity error detection. The optional parity memory module (BXMEM0) supports parity error generation in conjunction with the baseboard circuitry to provide a maximum of 384 MB of available system memory. The appropriate ECC registers are provided on the Xpress baseboard by the MECA component for the ECC memory module. The ECC memory module (BXECCMEM0) provides a maximum of 384 MB of fault tolerant system memory.


Xpress CPU Modules

Xpress CPU modules are compatible with all 32-bit software written for the i386 and Intel486 microprocessors. Operating System support includes SCO*, ISC, Solaris*, NextStep*, USG/Novell UnixWare*, Microsoft* OS/2*, IBM OS/2, and Microsoft DOS/Windows*. Rigorous testing ensures compatibility with a wide array of industry-standard software, expansion boards and peripheral devices. Certifications include Novell and Banyan network operating systems, IBM OS/2, and Microsoft Windows NT. Intel Digital Video Interactive (DVI) multi-media application hardware and Intel Indeo™ software also are certified.

A single connector on the baseboard provides a high performance interface to the CPU modules. The CPU modules are designed with four ground pads, one or two 6-pin edge connectors, providing a short path to ground for the high-speed components integrated on the module and an extra level of EMI shielding. A separate connector supports the optional memory.

Related Topics:

Single / DUAL Pentium( Processor Modules

NEW Intel486( CPU MODULES

EXISTING Intel486 CPU MODULES

INTEL486/50 CPU MODULE

Two-Socket CPU Modules


Single / DUAL Pentium( Processor Modules
Single / DUAL Pentium Processor Modules

These CPU modules utilize the new generation Intel 64-bit Pentium microprocessor technology. The 16 KB two-way set associative write-back microprocessor cache (8 KB code, 8 KB data) has a cache line size of 32 bytes, twice that of the Intel486 processor. In addition to the RISC-like architecture, the dual instruction pipeline, and superscalar 64-bit data path to the secondary cache memory, the Pentium processor has a completely revamped internal floating point unit to achieve five to seven times the performance of an i486 DX/50 CPU. The Pentium microprocessor permits dual-precision floating point numbers, two 32-bit data quantities, or two 32-bit instructions in one transaction on the 64-bit data bus. To maximize both cache and EISA bus transfers, a highly efficient bus snooping algorithm is controlled by connecting the SRAM data lines in pairs on the Xpress memory bus and by using separate strobes to enable the two SRAM groups to ensure the data requested by the EISA/ISA/DMA master is not 'stale.' When data in the 64-bit cache is found to be different than the data in system memory, the snooping logic invalidates the cache data, and the updated information will be written-back into main memory. This ensures data in the cache is consistent with the data in main memory.

The BXCPUPENT66 module uses the Pentium processor at iCOMP™ index 567 \ 66 MHz along with 256 KB of second-level SRAM cache  producing a proven 96% hit rate. The 66 MHz Pentium microprocessor component is fabricated using Intel's BiCMOS Process 651 technology (0.6 micron) and placed in a 273-pin PGA package. The cache line size is 32 bytes using the Intel 82496DX Cache Controller with eight 82491DX SRAM components, providing near-zero wait state performance on both reads and writes. The Pentium processor module uses a 64-bit data path between the microprocessor and 82491 SRAMs and a multiplexed 64-bit data bus between SRAM and the system memory.

The BXCPU2XPENT module has two of these 66 MHz Pentium processors and two independent 256 KB secondary write-back cache elements, one for each of the Pentium microprocessors on the CPU module. The cache line size is 32 bytes using the Intel 82496DX Cache Controller with eight 82491DX SRAM components, providing near-zero wait state performance on both reads and writes.  The dual Pentium processor module uses a 64-bit data path between the microprocessor and 82491 SRAMs and a multiplexed 64-bit data bus between SRAM and the system memory. The dual Pentium processor module includes two Intel 82489 Advanced Programmable Interrupt Controllers (APIC) which are required to execute with Symmetric Multi-Processing (SMP) operating systems.

The BXCPUPENT90 module contains a Pentium processor 735 \  90, which runs internally at 90 MHz, and externally to the memory and secondary cache subsystems at 60 MHz. The 90/60 MHz Pentium microprocessor component is fabricated using Intel's BiCMOS Process 852 technology (0.6 micron) running at 3.3 volts and is placed in a 296-pin PGA package. The module contains 512 KB of SRAM producing a proven 98% hit rate and utilizes a new cache architecture developed by Intel using the 82497DX cache controller and 16 82492DX SRAM components. The two-way, set associative 512 KB cache has a 32 byte cache line size.

The BXCPUPENT100 module (planned availability: Q4, 1994) is expected to be exactly the same as the BXCPUPENT90 module, but instead contains a Pentium processor running internally at 100 MHz, and externally to the memory and secondary cache subsystems at 66 MHz.


NEW Intel486( CPU MODULES
NEW Intel486 CPU MODULES

A new line of Xpress CPU modules has been designed to support IntelDX2, IntelDX4, and associated OverDrive processor upgrades operating at 33/100 MHz and 33/66 MHz. The enhanced X-Series CPU modules are designed to replace the existing Intel486 SX and DX designs with their smaller L2 cache resources and to provide a design path to support future Intel processors and OverDrive components. The four-layer CPU modules integrate a primary PQFP CPU site, a 238-pin Zero Insertion Force (ZIF) PGA upgrade socket, capability for a 512 KB secondary cache, an Intel designed cache controller ASIC, a 3.3 volt regulator, and some Xpress memory bus control logic in a layout 20% smaller than the existing two-socket CPU modules. The optional 0, 256, or 512 KB direct mapped, write-back secondary cache is integrated directly on the module. The zero wait state cache also supports concurrent operation during system DRAM refresh cycles, the ability to cache the entire memory space up to 1 GB, and the ability to cache any shadowed (write-protected) add-in card BIOS.

The BXCPU486DX266-C module (planned availability:  Q4, 1994) uses the next generation processor (referred to as the P24D) running at 66 MHz internally and 33 MHz externally.  This module is compatible with the Xpress Interface Bus and the ECC Memory module.  The high performance Intel486 CPU automatically takes an external 33 MHz clock signal and effectively doubles the speed of all internal Intel486 processes.  The 8 KB four-way set associative, write-back internal cache is organized as 512, 16-byte cache lines each capable of storing code or data.  The instruction execution unit can access this 8 KB cache with zero wait states and without generating any external CPU bus cycles. To maximize bus bandwidth on cache write fills, the module makes full use of the Intel486 burst mode capability by filling an internal 16-byte cache line from external system memory in as few as five (15ns) internal CPU clock cycles. To supplement the internal cache, the standard direct mapped, write-back 256 KB cache is soldered on the CPU module.  This secondary cache is a passive, write-back cache which allows for 32-bit memory write protections. The Intel-designed cache controller ASIC implements a snooping feature to ensure cache coherency when the CPU is put into a hold state.  When an EISA/PCI bus master owns the Xpress bus, main memory may be accessed or modified.  The snooping feature automatically senses any bus master transfers, checks the tag SRAM for the requested data, and invalidates any cache entry that was modified by the bus master. All caching on the BXCPU486DX266-C CPU module utilizes the write-back technique with a hit rate performance of approximately 93%.

The BXCPU486100-C CPU module (planned availability:  Q4, 1994) uses a 3.3 volt IntelDX4 running at 33 MHz externally and 100 MHz internally. The IntelDX4 component is fabricated using Intel's BiCMOS 852 process technology (0.8 micron) and placed in the 168-pin PQFP site. The four-way set associative, unified write-through internal 16 KB cache is organized as 512, 16-byte cache lines each capable of storing code or data. The instruction execution unit can access this 16 KB cache with zero wait states and without generating any external CPU bus cycles.  To maximize bus bandwidth on cache-to-memory operations, the module makes full use of the Intel486 burst mode capability by filling an internal 16 byte cache line from external system memory in as few as five (30ns) CPU clock cycles. This module is compatible with both the 32-bit Xpress Interface Bus and upcoming 64-bit Xtended Xpress Interface Bus.


EXISTING Intel486 CPU MODULES

The Xpress server platform product line contains a number of modules which have been architected to support Intel486 SX, DX, IntelDX2 and associated OverDrive processor upgrades operating at 25 and 33 MHz. They were designed to replace earlier PAL-based, two socket CPU modules and to provide a design to support future Intel processors and OverDrive components. The four- layer module integrates a primary PQFP CPU site, a 238-pin Zero Insertion Force (ZIF) PGA upgrade socket, capability for a 128 KB secondary cache, an Intel-designed cache controller ASIC and some Xpress memory bus control logic in a layout 40% smaller than the previously existing two-socket CPU modules. The optional 128 KB direct mapped, write-through secondary cache is integrated directly on the module. The zero wait state cache also supports concurrent operation during system DRAM refresh cycles, the ability to cache the entire memory space up to 1 GB, and the ability to cache any shadowed (write-protected) add-in card BIOS.  The Intel486 CPU modules in this section are not designed to be compatible with the Xpress ECC Memory module.

Product Code	CPU Installed	Jumpers	Comments
BXCPU486DX266-B	66 MHz IntelDX2	J1: 1-2 J2: 1-2 J4: 1-2 J5: 1-2	Ready for future OverDrive processors based on Pentium pocessor technology. The 128 KB cache is present on the CPU module and enabled.  Not compatible with the ECC memory module.
BXCPU48633-B	Intel486 DX/33	J1: 1-2 J2: 1-2 J4: 1-2 J5: 1-2 J6: 1-2	Ready for the IntelDX2/66 or future OverDrive processors in the blue ZIF socket. The 128 KB cache is not integrated on the CPU module. Customer option to install six tag/data cache components. Secondary cache enabled by moving <J6: 2-3>. The primary i486DX processor is soldered into the 196 pin PQFP site. Not compatible with the ECC memory module.
BXCPU486SX33-B	Intel486 SX/33	J1: 1-2 J2: 1-2 J4: 1-2 J5: 1-2 J6: 2-3 J7: 1-2	Ready for the i487 SX/33 coprocessor, the 66 MHz IntelDX2 processor or future OverDrive processors in the blue ZIF socket. The 128 KB cache is present on the CPU module and enabled. The primary i486 SX processor is soldered into the 196 pin PQFP site. Not compatible with the ECC memory module.
BXCPU486SX25-B	Intel486 SX/25	J1: 2-3 J2: 1-2 J4: 1-2 J5: 1-2 J6: 1-2 J7: 1-2	Ready for the i487 SX/25 coprocessor. The primary Intel486 SX processor is soldered into the 196 pin PQFP site. The 128 KB cache is not integrated on the CPU module. Customer option to install six tag/data cache components. Secondary cache enabled by moving <J6:2-3>. OverDrive Ready for i487 SX/33 coprocessor, IntelDX2/66 processor, or future OverDrive processor in the blue ZIF socket by moving <J1:1-2>. Not compatible with the ECC memory module.
Table 1. Factory Default Configurations, i486 Xpress CPU Modules.

The BXCPU486DX266-B CPU Module uses an IntelDX2 processor running at 66 MHz internally and 33 MHz externally. The component is fabricated using Intel's CHMOS V process (0.8 micron) and placed in the 238-pin PGA site. The four-way set associative, write-through internal cache is organized as 512, 16-byte cache lines each capable of storing code or data. The instruction execution unit can access this 8 KB cache with zero wait states and without generating any external CPU bus cycles. The IntelDX2 chip doubles the performance of the 8 KB cache, write buffer logic, floating-point circuitry and other internal functions to dramatically increase overall system performance. To maximize bus bandwidth on cache write fills, the module makes full use of the i486 burst mode capability by filling an internal 16 byte cache line from external system memory in as few as five (15ns) internal CPU clock cycles. To supplement the internal cache, the direct mapped 128 KB cache is soldered on the module. This secondary cache is a passive, write-through cache which allows for 32-bit memory write protection. The Intel-designed cache controller ASIC implements a snooping feature to ensure cache coherency when the CPU is put into a hold state. When an EISA bus master owns the Xpress Interface Bus, main memory may be accessed or modified. The snooping feature automatically senses any bus master transfers, checks the tag SRAM for the requested data, and invalidates any cache entry that was modified by the bus master. All caching on the module utilizes the writethrough technique with hit rate performance of approximately 93%.

The BXCPU48633-B CPU module uses an Intel486 DX processor running at 33 MHz. The BXCPU486SX33-B  CPU module uses an i486 SX processor running at 33 MHz. The Intel486 DX and SX chips are fabricated using Intel's CHMOS IV process technology (1.0 micron) and placed in the 196-pin PQFP site. The four-way set associative, write-through internal cache is organized as 512, 16-byte cache lines each capable of storing code or data. The instruction execution unit can access this 8 KB cache with zero wait states and without generating any external CPU bus cycles. To maximize bus bandwidth on cache-to-memory operations, the module makes full use of the Intel486 processor burst mode capability by filling an internal 16-byte cache line from external system memory in as few as five (30ns) CPU clock cycles. To supplement the internal cache, a direct-mapped 128 KB cache is soldered on the BXCPU486SX33-B module. The secondary cache is a passive, write-through cache which allows for 32-bit memory write protection. The Intel-designed cache controller ASIC implements a snooping feature to ensure cache coherency by automatically sensing any bus master transfers, checking the tag SRAM, and invalidating any cache entry that was modified by the bus master. All caching on both of the CPU modules utilize the lookaside writethrough technique with write posting to improve memory write performance. Hit rates with the integrated cache approach 93%, keeping the number of wait states to a minimum. The BXCPU48633-B module contains six sockets for the customer to install a 128 KB secondary cache using four 20ns, 32k x 9 PLCC synchronous static BurstRAMs and two 15ns, 8k x 8 SOJ tag SRAMs. Both the i486DX/33 and i486SX/33 CPU modules provide a dedicated socket for the Intel OverDrive Processor, which doubles the CPU performance by running internally at twice the external clock speed. This speed doubling includes the internal 8 KB cache, integer math circuitry, floating-point math circuitry, pre-fetch queues, embedded write buffers, and single clock execution timings. Customers purchasing the OverDrive processor will visibly notice a performance increase up to 70% across all applications. The OverDrive processor is simple to install in the 238-pin Intel blue OverDrive ZIF socket.

The BXCPU486SX25-B module uses an i486 SX running at 25 MHz. The component is fabricated using Intel's CHMOS IV process technology (1.0 micron) and placed in the 196-pin PQFP site. The four-way set associative, write-through internal cache is organized as 512, 16-byte cache lines each capable of storing code or data. The instruction execution unit can access this 8 KB cache with zero wait states and without generating any external CPU bus cycles. To maximize bus bandwidth on cache write fills, the module makes full use of the i486 burst mode capability by filling an internal 16 byte cache line from external system memory in as few as five (40ns) CPU clock cycles. Six sockets are available for the customer to install a 128 KB secondary cache using four 20ns, 32k x 9 PLCC synchronous static BurstRAMs and two 15ns, 8k x 8 SOJ tag SRAMs.  A socket is provided to accept an Intel487™ SX math coprocessor (the i486 SX CPU does not have an internal floating point unit) or an Intel OverDrive Processor. The OverDrive Processor contains an internal floating point unit, and it doubles the performance of the CPU by running internally at twice the external clock frequency. This speed doubling includes the internal 8 KB cache, integer math circuitry, pre-fetch queues, embedded write buffers, and single clock execution timings. OverDrive processors are simple to install in the 238-pin blue OverDrive Ready ZIF socket and they will produce a visible performance gain of up to 70% across all applications.


INTEL486/50 CPU MODULE

An Intel486 DX microprocessor running at 50 MHz forms the core of the BXCPU48650 module. The microprocessor is based on Intel's CHMOS V process using 0.8 micron technology, and comes in a 168-pin PGA package. The internal 8 KB cache is fourway set associative and supports the writethrough technique with a cache line size of 16 bytes. The instruction execution unit can access this 8 KB cache with zero wait states and without generating any external CPU bus cycles. To maximize bus bandwidth on cache write fills, the module makes full use of the Intel486 processor's burst mode capability by filling an internal 16-byte cache line from external system memory in as few as five (20ns) CPU clock cycles.  The Intel486 DX/50 CPU module is not designed to be compatible with the Xpress ECC memory module.

Related Topics:

WRITE-BACK SECONDARY CACHE ON i486DX/50 CPU MODULE


WRITE-BACK SECONDARY CACHE ON i486DX/50 CPU MODULE

In addition to the internal cache, an external twoway set associative writeback cache is provided with 256 KB of SRAM, producing a proven 96% hit rate. The cache operates in writeback mode with a cache line size of 16 bytes using the Intel 82495DX Cache Controller with eight 82490DX static RAM components providing near-zero wait state performance on both reads and writes. To maximize both cache and EISA bus transfers, a highly efficient bus snooping algorithm is controlled by the baseboard circuitry to ensure the data requested by the EISA/ISA/DMA master is not stale. When data in the cache is found to be different than in Xpress system memory, the snooping logic invalidates the cache data, and the updated information will be written-back into main memory. This ensures data in the cache is consistent with main memory even after EISA Bus Master DMA or DMA Burst cycles.


Two-Socket CPU Modules

An earlier line of CPU modules (developed for the Xpress introduction) supports i486 SX, DX, and DX2 operating at 25 MHz and 33 MHz with an optional 64/128 KB cache daughter add-in module. The six layer, PAL-based Xpress CPU modules consist of a primary CPU, a 238-pin PGA upgrade socket, the secondary cache socket, and some Xpress memory bus control logic. The optional IDT 7MB6098S33K zero wait state cache add-in module supports concurrent operation during system DRAM refresh cycles, the ability to cache the entire 384 MB memory space, and the capability to cache any shadowed (write-protected) add-in card BIOS.

The BXCPU486DX250 CPU Module uses an i486DX running at 50 MHz internally. The component is fabricated using Intel's CHMOS V process technology (0.8 micron) and placed in a 168-pin PGA package. The CPU automatically takes an external 25 MHz clock signal and effectively doubles all internal processes. The four-way set associative, write-through internal cache is organized as 512 cache lines of 16 bytes, each capable of storing code or data. The instruction execution unit can access this 8 KB cache with zero wait states and without generating any external CPU bus cycles. The processor doubles the performance of the 8 KB cache, write buffer logic, floating-point circuitry and other internal functions to dramatically increase overall system performance. To maximize bus bandwidth on cache write fills, the module makes full use of the Intel486 processor's burst mode capability by filling an internal 16-byte cache line from external system memory in as few as five (20ns) internal CPU clock cycles. To supplement the i486 internal 8 KB cache, a socket is supplied for an IDT direct mapped 128 KB cache. This secondary cache is a passive, write-through cache which allows for 32-bit memory write protection. The 50 MHz IntelDX2 processor module cache algorithm implements a snooping feature to ensure cache coherency by automatically sensing any bus master transfers, checking the tag SRAM and invalidating any cache entry that was modified by the bus master. All caching on the i486DX2/50 CPU module utilizes the lookaside writethrough technique with write posting to improve memory write performance. Hit rates with the IDT cache approach 93%, keeping the number of wait states to a minimum.

The Intel486 DX2-66, Intel486 DX-33, and Intel486 DX-25 two-socket CPU modules have transition to the existing smaller Xpress CPU modules and are considered end-of-life products.

Jumper	Location	Default	Description
N/A	J1	N/A	Not utilized on the CPU module. Included for future features.
487TX	J2	No jumper	The default (no jumper installed) is ready to accept the i487 SX/25 in the OverDrive socket. When 2-3 is installed, use specifically for the installation of the 50 MHz or 66 MHz OverDrive processor. The 1-2 jumper position is Intel reserved.
128K	J3	1-2	Jumper 1-2 selects a 128 KB cache to be recognized. When 2-3 is installed, a 64 KB cache is recognized.
Table 2a. Xpress Two-Socket 25 MHz Intel486 SX / 33 MHz Intel486 DX CPU Module Jumpers

Jumper	Location	Default	Description
N/A	J1	N/A	Not utilized on the CPU module. Included for future features.
N/A	J2	N/A	Not utilized on the CPU module. Included for future features
128K	J3	1-2	Jumper 1-2 selects a 128 KB cache to be recognized.  When 2-3 is installed, a 64 KB cache is recognized.
Table 2b. Xpress Two-Socket 50 MHz / 66 MHz IntelDX2 CPU Module Jumpers


Xpress Memory Modules

BXMEM0 Memory Module

ECC Memory Card


BXMEM0 Memory Module

The optional BXMEM0 memory module can be inserted into a proprietary bus slot next to the CPU module, and it directly interfaces with the Xpress Interface Bus. The memory transfer performance is identical to the SIMM memory on the system baseboard. The CPU module's self-configuring decode logic requests the size identification of each SIMM in all memory partitions during a memory configuration sequence just before the Power On Self Test (POST). This feature synchronizes the CPU module and memory control logic with the BXMEM0 memory module, allowing the CPU/memory bus to run at the highest possible transfer speed.  All 256 MB of memory available on the memory module is cached by the cache controller on the CPU module. The BXMEM0 memory module supports byte parity memory. The addresses of parity errors are latched into a software accessible register which effectively traps parity errors and issues a NMI to the operating system. All CPU modules are compatible with the BXMEM0 memory module.

All accesses to the memory module are interleaved for 64-bit performance and complete compatibility with future Intel microprocessors. This allows the user a tremendous amount in selecting the total amount of system memory. The interleaving scheme requires memory upgrades in pairs using the same size SIMMs. Therefore, the BXMEM0 memory module, like Xpress baseboard system memory, must always have an even number of SIMMs installed. The eight 36-bit SIMM sockets on the BXMEM0 memory module accept up to 256 MB (using 32 MB SIMMs).

Figure 3. BXMEM0 Memory Module

Location	Banks	Default	Description
W1	J1 and J5	1-2	When set to 1-2 (default), SIMM banks J1 and J5 are compatible with 1, 2, 4 and 8 MB SIMMs. Jumper setting 2-3 selects 16MB and 32MB SIMMs in the bank.
W2	J2 and J6	1-2	When set to 1-2 (default), SIMM banks J2 and J6 are compatible with 1, 2, 4 and 8 MB SIMMs. Jumper setting 2-3 selects 16MB and 32MB SIMMs in the bank.
W3	J3 and J7	1-2	When set to 1-2 (default), SIMM banks J3 and J7 are compatible with 1, 2, 4 and 8 MB SIMMs. Jumper setting 2-3 selects 16MB and 32MB SIMMs in the bank.
W4	J4 and J8	1-2	When set to 1-2 (default), SIMM banks J4 and J8 are compatible with 1, 2, 4 and 8 MB SIMMs. Jumper setting 2-3 selects 16MB and 32MB SIMMs in the bank.
Table 3. Xpress BXMEM0 Memory Module Jumpers

SIMMs compatible with the BXMEM0 memory module are JEDEC-21C standard, fast page mode DRAM surface-mounted on the SIMM connector in 1, 2, 4, 8, 16, and 32 MB capacities. A complete list of tested SIMMs is available via FaxBack*.


ECC Memory Card

Taking a page from the fault tolerant mainframe memory architecture, the BXECCMEM0 Error Checking and Correcting (ECC) Memory Module will correct memory failures using cost-effective, industry standard SIMMs and have the capacity to boost the system memory to 384 MB. The memory module incorporates a 1-bit chip design with each bit of a code word stored in a different chip.  The ECC memory module can correct all single bit errors instantly, detect bad nibble bit errors, and detect all double bit errors.  By utilizing standard 72-pin SIMMs (1Mb x 36 through 16Mb x 36) in a 128-bit fashion, the ECC memory module will be compatible with the new Intel486 CPU modules, Pentium processor modules, and the future P6 microprocessor in both Xpress and Xtended Xpress system baseboards.  The BXECCMEM0 is planned to be available during Q3, 1994.

The ECC memory board has several features which make it technologically advanced:

•	384 MB of total memory capacity with JEDEC-21C industry standard SIMMs

•	32-bit interface for IntelDX2 and IntelDX4 modules

•	64-bit interface for Pentium processor modules

•	128-bit interleave interface to support future Intel processors

•	12 SIMM connectors divided into two banks

•	Uses standard fast-page parity SIMMs rather than expensive ECC SIMMs

•	Both data and address bus parity are supported

•	Capability to map out bad SIMM locations via MECA3 component

Error correction coding is the protection of information against errors which occur during data transmission or data storage in the memory subsystem.  The Xpress ECC Memory Module detects and corrects single bit errors from DRAM (Dynamic Random Access Memory) in real time.  The memory module also is capable of detecting all two-bit errors and up to four errors in a DRAM nibble going across the 32-/64-bit Xpress bus. To achieve this, the Xpress ECC Memory Module makes use of a well known type of error correcting algorithm called the Hamming code, developed by R.W. Hamming.  Slight modifications have been made to the code in order for the 32-/64-/128-bit ECC memory board to have additional error detecting and correcting abilities.  The ECC Memory Module will perform error correction and check bit generation on the fly.  This means that the Xpress system bus never will be halted to correct single bit errors or generate check bits.  A rotational modified Hamming code, called SEC-DED-S4ED (single-bit error detect and correct, double-bit error detect, all errors in a nibble detect), is implemented on the Xpress ECC board.  The advances of gate array integrated technology made it possible to achieve this with encoders-decoders.  Error-control coding additionally allowed Intel designers to control the way errors are handled and corrected.

The transfer data width of the ECC memory board is 32-/64-bits and is compatible with newer X-series IntelDX2/66 CPU modules, 100 MHz IntelDX4 CPU modules, single Pentium processor modules, and dual Pentium processor modules. All read cycles and write cycles to a memory bank on the ECC Memory Module are 72-bit operations, requiring 64-bits of data plus the needed eight check bits. Any read/write operation to ECC memory less than 64-bits from an Intel486 processor module is considered a partial read/write. Partial read cycles will not degrade system performance because every read operation makes 64-bits of corrected data available on the Xpress bus for each memory bank accessed. Optimum performance can be seen with 64-bit Pentium processor modules which have been designed to take advantage of the ECC data path width. The ECC memory board has been designed to be accepted on the upcoming Xtended Xpress baseboards which have a 64-/128-bit bus.


RAID Disk Controller Card

The Intel XRAID4 SCSI Disk Array Controller allows the Xpress system to operate with a high degree of fault tolerance, while maintaining a high performance peripheral interface. The XRAID4 supports  (RAID 0) data striping without parity, (RAID 1) disk mirroring, (RAID 5) data striping with parity distributed across all disks in the array and (RAID 6) mirrored striped disks.  Use of RAID levels 1, 5, or 6 improves system data availability and provides fault resistance. For transaction processing environments, RAID levels 0, 1, 5, and 6 also may improve I/O rates. Other supported RAID and SCSI features include hot spares, concurrent reconstruction, overlapped seeks and command queues.

The EISA bus master card features two Fast SCSI-2 channels, uses an Intel i960 RISC processor, and ships with a 4 MB cache with upgrade support for 16 or 64 MB.  The two independent SCSI channels, each using an NCR 53C720 SCSI processor, each supports seven peripherals. Each channel conforms to the SCSI-2 specification and transfers data at up to 10 MB per second.  Intel Flash memory contains the BIOS code to make upgrading the BIOS a snap, while an easy-to-use software configuration utility simplifies integration.

The Xpress ECU diskette allows easy integration of the disk controller into the deskside systems.  A DOS-based Disk Array Configuration Utility configures the controller for use by MS-DOS, Novell or SCO UNIX operating systems.  The XRAID4 currently ships with five software support packages, XRAID960 Utilities for MS-DOS, Software Drivers for SCO UNIX V.3.2.4, IBM OS/2 2.x, Microsoft Windows NT, and Software Drivers for Novell NetWare 3.x / 4.x. The USG/Novell UnixWare 1.x / 2.x software drivers are located on the Intel Bulletin Board System. Banyan Vines 5.53 contains the required software drivers for the XRAID4 are in the shrink-wrapped version of the network operating system.  All of these software support packages provide the appropriate drivers to configure the operating systems for the available RAID levels, and most of them contain a driver which monitors any error/fault activity.

For complete information, consult the separate Xpress Disk Array Application Note.

Figure 4. XRAID4 Disk Array Controller


Xpress System Baseboards

Figure 5. Xpress Baseboard Features

Related Topics:

Six-Slot Baseboard

Eight-Slot System Baseboard

Common System Baseboard Features

Enhancing Performance


Six-Slot Baseboard

Exclusively integrated in the Xpress Desktop and XpressRACK platform, the XBASE6E0 baseboard with SMT and fine-pitch components displays workmanship beyond many other PC designs. The full size, 6-layer baseboard measures 10.45" by 12.70" with mounting holes placed to fit virtually all standard PC/AT system chassis. A mechanical drawing is available to check the back I/O panel, mounting holes and front panel features to ensure proper integration.  This system baseboard is available with no memory installed and ready to accept the wide range of fast-page, JEDEC-21C compatible SIMMs for a total of 128 MB of system memory.  Additional integration and quality engineering is seen in the metal SIMM tabs, shrouded and locking I/O connectors, and ease of upgrading. The few baseboard configuration jumpers can be found at the frontleft edge of the baseboard.  All jumper locations are silkscreen labeled for easy identification.

Jumper	Location	Default	Description
FLASH	E0191	1-2	When set to 'BOOT,' the system will run from the normal section of the Flash BIOS. Move only when the Flash BIOS becomes corrupted and needs to boot from protected recovery BIOS section.
VGA	E0290	1-2	When set to 2-3, the onboard WD90C31 video control logic is disabled. Normally required for use with add-in VGA cards.
FLOPPY	E0291	2-3	Floppy Read/Write-able; 1-2 selects floppy protection.
NVRAM	E0292	1-2	When set to 'CLR' the NVRAM settings will be set to their default values.
PASSWORD	E0390	2-3	When set to 'OFF' (1-2) the password stored in CMOS will be cleared.
SIMM0	E0391	1-2	When set to 'STD' (standard) mode, SIMM bank 0 is compatible with 1 MB, 2 MB, 4 MB and 8 MB SIMMs. Jumper setting 2-3 selects 16 MB and 32 MB SIMMs in Bank 0.
SIMM1	E0392	1-2	When set to 'STD' (standard) mode, SIMM bank 1 is compatible with 1 MB, 2 MB, 4 MB and 8 MB SIMMs. Jumper setting 2-3 selects 16 MB and 32 MB SIMMs in Bank 1.
VID1M	E0720	1-2	Jumper location near CPU module connector. When set to 2-3, four user-provided 256K x 4 DRAMs are selected to allow 1 MB of video memory. Default jumper (1-2) selects 512KB of onboard video memory.
F-P	E0721	1-2	Jumper location near CPU module connector. When set to 2-3, the FLASH BIOS is protected and cannot be updated. This setting will also protect the BIOS Setup, EISA Configuration information and not allow the user to change any system settings. Default jumper (1-2) allows user to enter and modify selections in the BIOS Setup Utility and EISA Configuration Utility.
VID	E0722	2-3	Jumper location near CPU module connector. When set to 2-3 the onboard WD90C31 video controller base address circuitry is located at 03C3H. Jumper 1-2 locates the base address of the WD90C31 at 046E8H.
Table 4. Six-Slot System Baseboard Jumpers.


Eight-Slot System Baseboard

An Intel-designed Xpress Deskside/LX mainstream server integrates the cost-competitive BLXBASE8E0-C baseboard with fine-pitch SMT components. The 6-layer system baseboard measures 12.45" by 12.70". It is available with no memory installed (0 MB) and it is ready to accept the wide range of fast-page, JEDEC-21C compatible SIMMs up to 128 MB of system memory.  There is no integrated SCSI controller or SMP support for the dual Pentium processor module on this baseboard.  A mechanical drawing is available to double-check the back I/O panel, mounting holes and front panel features to ensure proper integration.  The baseboard configuration jumpers can be found at the frontleft edge of the baseboard.  All default jumper locations are installed on the left 1-2 side of the stake pins.  All jumpers are silkscreen labeled for easy identification.

Jumper	Location	Default	Description
FLASH	E0190	1-2	When set to 'BOOT,' the system will run from the normal section of the Flash BIOS. Move only when the Flash BIOS becomes corrupted and needs to boot from protected recovery BIOS section.
VGA	E0290	1-2	When set to 2-3, the onboard WD90C31 video control logic is disabled. Normally required for use with add-in VGA cards.
FLOPPY	E0291	1-2	Floppy Read/Write-able; 2-3 selects floppy protection.
NVRAM	E0292	1-2	When set to 'CLR' the NVRAM settings will be set to their default values.
PASSWORD	E0390	1-2	When set to 'OFF' (2-3) the password stored in CMOS will be cleared.
SIMM0	E0391	1-2	When set to 'STD' (standard) mode, SIMM bank 0 is compatible with 1 MB, 2 MB, 4 MB and 8 MB SIMMs. Jumper setting 2-3 selects 16 MB and 32 MB SIMMs in Bank 0.
SIMM1	E0392	1-2	When set to 'STD' (standard) mode, SIMM bank 1 is compatible with 1 MB, 2 MB, 4 MB and 8 MB SIMMs. Jumper setting 2-3 selects 16 MB and 32 MB SIMMs in Bank 1.
VID1M	E0720	1-2	Jumper location near CPU module connector. When set to 2-3, four user-provided 256Kx4 DRAMs are selected to allow 1 MB video memory. Default (1-2) selects 512KB onboard video memory.
F-P	E0721	1-2	Jumper location near CPU module connector. When set to 2-3, the FLASH BIOS is protected and cannot be updated. This setting will also protect the BIOS Setup, EISA Configuration information and not allow the user to change any system settings. Default jumper (1-2) allows user to enter and modify selections in the BIOS Setup Utility and EISA Configuration Utility.
VID	E0722	1-2	Jumper location near CPU module connector. When set to 1-2 the onboard WD90C31 video controller base address circuitry is located at 03C3H. Jumper 2-3 locates the base address of the WD90C31 at 046E8H.
Table 5. Eight-Slot System Baseboard Jumpers.

The Xpress Deskside/MX premium server contains the BXBASE8E0-C system baseboard, which has several design differences from the BLXBASE8E0-C. The Intel-designed, 6-layer board measures 12.45" by 12.70", includes an Adaptec AIC-7770 SCSI-2 controller capable of supporting 14 SCSI devices, improved design to allow all eight EISA slots to accept bus master add-in cards, and Symmetric Multi-processing support for the Dual Pentium processor module. This system baseboard is also available with no memory installed, and ready to accept the wide range of fast-page, JEDEC-21C compatible SIMMs up to 128 MB of system memory.  The BXBASE8E0-C can be integrated into the Xpress Deskside/LX server platform as an option.  Additional integration and quality engineering are seen in the snap-in hard drive installation, international safety/EMI/RFI certifications on file, metal SIMM tabs, SCSI distribution board, LCD display, and shrouded and locking I/O connectors.


Common System Baseboard Features

WESTERN DIGITAL WD90C31 GRAPHICS CONTROLLER

ADAPTEC AIC-7770 SCSI HOST CONTROLLER

FLOPPY DRIVE INTERFACE

IDE HARD DRIVE INTERFACE

XPRESS CHIP SET

EISA BUS CHIP SET

DIRECT MEMORY ACCESS

SYSTEM BIOS

WESTERN DIGITAL VIDEO BIOS

KEYBOARD CONTROLLER

VIDEO CONNECTORS

PS/2 KEYBOARD AND MOUSE PORTS

TEXAS INSTRUMENTS SERIAL/PARALLEL CONTROLLER

REAL TIME CLOCK, CMOS RAM, AND BATTERY

EISA NON-VOLATILE RAM


WESTERN DIGITAL WD90C31 GRAPHICS CONTROLLER

The Xpress server platforms incorporate an extended Super VGA video solution onto the system board using a Western Digital WD90C31 chip set. The WD90C31 is fully compatible with the MDA, CGA, Hercules Graphics, EGA, and VGA video standards and incorporates a GUI hardware accelerator. The standard configuration comes with 512 KB of installed video DRAM. This allows for resolutions up to 800 x 600 x 256 colors or 1024 x 768 x 16 colors. The video memory can be increased to a total of 1 MB by adding four 256K x 4 fast page mode 60ns DRAMs to the DIP sockets on the system baseboard. With 1 MB of display DRAM installed, the Xpress baseboard supports a maximum resolution of 1024 x 768 x 256 colors or 1280 x 1024 x 16 colors. With the Sierra HiColor RAMDAC, the WD90C31 is capable of displaying 32,000 colors in some video resolutions when executing in Windows 3.1 and AutoDesk AutoShade 2.0 environments. The Xpress baseboard video circuitry supports both non-interlaced and interlaced monitors, even at the higher resolutions. The display DRAM is paged into 128 KB of RAM located between A0000H and BFFFFH.


ADAPTEC AIC-7770 SCSI HOST CONTROLLER

The two SCSI-2 interfaces located on the 8-slot Xpress baseboard are provided by the AIC-7770 single chip SCSI host adapter. The AIC-7770 component features a 32-bit EISA bus master interface that supports 33 MB/second Type C burst DMA transfers, and a 256 byte data FIFO buffer located between the EISA and SCSI interfaces for maximum bus transfer rates. The integrated SCSI-2 controller provides the flexibility to use most any 8-bit, single-ended SCSI bus configuration combinations. The AIC-7770 also features TwinChannel SCSI:  two independent 8-bit configurable Fast SCSI channels able to support transfers up to 10 MB/second. No additional logic, termination, or resistor loads are required to connect up to seven SCSI peripherals to each Fast/Narrow SCSI-2 channel.


FLOPPY DRIVE INTERFACE

The interface is provided by the 68-pin (PLCC) Intel 82077SL-1 floppy controller. The interface supports both double and high density media in 3½" and 5¼" form factors (360 KB, 760 KB, 1.2 MB, 1.44 MB and 2.88 MB) and the Japanese 3-mode floppy standard. The onboard floppy controller can be disabled using the EISA Configuration Utility or BIOS Setup utility to allow the interrupt (IRQ6) to be utilized by an EISA/ISA add-in card. The Xpress Desktop, Xpress/LX, and Xpress/MX deskside platforms are configured with a single 3½" 1.44 MB floppy drive. A security feature jumper can disable write cycles to the floppy for additional system security.


IDE HARD DRIVE INTERFACE

The Intelligent Device Electronics (IDE) interface is an 8-/16-bit hard drive interface able to interact with the EISA bus. The IDE interface consists of five buffer components, address decode circuitry (provided by the 82351DS CLASIC controller), a standard 40-pin connector, and a 4-pin hard drive activity LED connector. The onboard IDE interface is compatible with the CAM type 2 (or faster) specification and it can be disabled using the EISA Configuration Utility or BIOS Setup to allow the interrupt (IRQ14) to be utilized by an add-in card.


XPRESS CHIP SET

Memory to EISA Control (MECA); Intel 82356CS

This 160-pin device is responsible for the interface between the EISA bus and the Xpress Interface Bus.  The control array component converts asynchronous memory cycles to synchronous cycles for the 82358DT EBC, and it arbitrates among the processor and bus masters for main memory control.  This device initiates the Xpress bus snooping cycles and directly supports the write-through and write-back cache protocols.  Memory decode and memory attributes are also integrated to support either parity or ECC memory modules.

Xpress Memory DRAM Control (RCA); Intel 82356DS

This 160-pin device generates the RAS# and CAS# signals to the Xpress Interface Bus main memory.  The 82356DS includes the address MUX/LATCH which takes the host address and generates the multiplexed memory addresses.  A 64-bit wide memory path is supported using 36-bit SIMMs.

Data Path Parity Unit (DPP); Intel 82353DS

This 80-pin component provides parity generation/checking between the data bus and the Xpress bus main memory. Two 82353DS components are needed on the baseboard for the 32-bit Xpress interface bus lines to 64-bit DRAM interface. The 82353DS component is not equivalent to the Intel EISA Bus Buffer (EBB 82352).

Common Local I/O Controller (CLASIC); Intel 82351DS

This 160-pin component controls various peripheral components (Western Digital SVGA controller, flash memory, and EISA ID registers) on an external dedicated 16-bit bus, and it supports the required I/O logic (floppy controller, IDE, serial, parallel, mouse, etc.) on an 8-bit bus. This device also controls all I/O requests to the Xpress system when interfacing to the 32-bit EISA host bus.


EISA BUS CHIP SET

EISA Bus Controller (EBC); Intel 82358DT

The 82358DT is a superset of the original 82358, and it includes a mode compatible with the 82359 Buffered Bus component.  This 132-pin component translates CPU commands into EISA/ISA protocols.  The 82358DT EBC controls all EISA bus cycles, including DMA transfers, EISA and ISA bus master cycles, and host EISA cycles.  It also controls any required byte swapping, byte assembly and controls data steering from memory to the EISA bus.  This component is used in non-DT mode for higher system performance at 50 MHz and beyond.

Integrated System Peripheral (ISP); Intel 82357

This 132-pin component integrates key EISA I/O devices. It incorporates seven 32-bit DMA channels (8237A-compatible), five 16-bit timer/counters (8254-compatible), two eight-channel interrupt controllers (8259-compatible), Non-Maskable Interrupt (NMI) generation/control logic, refresh address generation, and EISA bus arbitration.

EISA Bus Buffer (EBB); Intel 82352

The 120-pin component provides address and data buffering for the EISA bus; incorporates multiple 32-bit address/data latch logic, address/data buffer logic, and address/data driver circuitry. The 82352 EBB also assists in the EISA bus parity generation/parity checking.


DIRECT MEMORY ACCESS

Xpress server platforms provide seven ISA-compatible DMA channels through the system's EISA bus implementation. The EISA DMA controller (Intel 82357 ISP) also supports DEMAND and BLOCK mode DMA transfers. These modes allow multiple continuous transfers and high speed bus cycles which achieve data transfer rates up to 33MB/second. Every DMA channel can be programmed for 8, 16 or 32-bit DMA device size. All DMA channels support ISA-compatible Type A (5.33 MB/second), Type B (8MB/second), or Burst DMA (33MB/second) timing modes. The DMA memory mapper supports the full 4 GB memory range using up to a 16 MHz clock rate. The onboard floppy disk controller uses DMA channel 2 when enabled. The onboard IDE interface uses DMA channel 3 when enabled. Special circuitry reprograms DMA3 as a 16-bit channel.


SYSTEM BIOS

The system BIOS, SCSI BIOS, and video BIOS are stored in two 128 KB Intel Flash Memory devices (28F001BT), providing a total of 256 KB of program code space and non-volatile storage space through a paged ROM memory scheme.  Flash memory is a high-density, non-volatile technology which retains stored BIOS and configuration information even when the system power is turned off.  The Flash memory can be reprogrammed easily using a BIOS update diskette.  In addition to the Xpress system BIOS (180 KB), the Flash memory also contains the BIOS Setup utility (8 KB), EISA configuration information (8 KB), Power-On Self-Tests (4 KB), video BIOS (32 KB), an 8 KB user definable region, and update recovery code (16 KB).  For improved system performance, the Xpress server platform supports system BIOS shadowing, allowing the BIOS to execute from 32-bit onboard write-protected DRAM instead of the slower 8-bit Flash devices.


WESTERN DIGITAL VIDEO BIOS

The Western Digital BIOS supports normal VGA modes (0, 1, 2, 3, 4, 5, 6, 7, D, E, F, 10, 11, 12, 13) and it also supports several enhanced video modes. The video BIOS is integrated into the Xpress system BIOS.  It requires Xpress system BIOS 1.00.06 (or greater) to utilize the Sierra HiColor DAC's 32,000 colors.  To use other addin video adapters, the onboard video BIOS can be disabled with baseboard configuration jumper (E0290). The video BIOS appears at E0000-E7FFF, and it is always shadowed when the onboard video is enabled.  An ECU/BIOS setup option allows for the video BIOS to be located at C0000 or C8000 instead of E0000, thus allowing the address space from E0000 to E7FFF to be made available for other uses.


KEYBOARD CONTROLLER

An Intel 8742 surface-mount microcontroller contains the Phoenix Technologies PS/2-compatible keyboard/mouse controller code. The PS/2-style keyboard and mouse connectors are located on the back panel. The controller code supports Power-On/Reset (POR), network, and keyboard password protection.  Setting network and keyboard passwords requires using a utility located on the EISA Configuration Utility (ECU) disk which ships with each Xpress system.  The POR password can be set via the BIOS SETUP program.


VIDEO CONNECTORS

A standard PS/2 15pin analog VGA connector is provided on the I/O back panel and a VESA compliant 8514/A feature connector can be found on the Xpress baseboard.  Feature connectors typically are used as a VGA pass-through when an auxiliary video subsystem, such as an 8514/A compatible video card or DVI board set, is installed in one of the EISA slots.


PS/2 KEYBOARD AND MOUSE PORTS

The PS/2 keyboard and mouse ports are 6-pin mini DIN connectors located on the back panel.  These ports are controlled by an Intel 8742 microcontroller incorporating the Phoenix Technologies keyboard controller firmware.  Readily-available adapters allow the use of PC/AT style keyboards. The PS/2 mouse port can be disabled with the EISA Configuration Utility (ECU) or the BIOS Setup utility to allow EISA/ISA add-in cards to use the interrupt (IRQ12).


TEXAS INSTRUMENTS SERIAL/PARALLEL CONTROLLER

The Xpress server platforms use a TI16C552 to integrate one parallel and two serial ports on the system baseboard.  Standard DB9 and DB25 AT-type connectors are available on the back panel. The serial ports include 16-byte FIFOs and are capable of operation up to 56K baud.  Each serial port can be enabled separately with either edge- or level-sensitive interrupts. When disabled, serial port interrupts are available for EISA/ISA add-in cards. Either serial port can be programmed as COM1, COM2, COM3, COM4, or disabled.  The parallel port can be configured as LPT1, LPT2, LPT3 or disabled.  The parallel port can be configured for bi-directional (PS/2-compatible) or Centronics (PC/AT-compatible) modes. When disabled, parallel port interrupts are available for EISA/ISA add-in cards.


REAL TIME CLOCK, CMOS RAM, AND BATTERY

The Real Time Clock (RTC) is implemented using a Dallas DS1287 device.  The DS1287 is accurate to within 13 minutes/year and it requires no external support (the battery and oscillator are integrated into the device).  The component is socketed and can be replaced if the internal battery loses its charge (the internal battery has an estimated lifetime of ten years).  The DS1287 CMOS memory supports the standard 64byte batterybacked RAM: 14 bytes for clock/control registers and 50 bytes of general purpose non-volatile CMOS RAM.  All CMOS RAM is reserved for system BIOS use only.  The CMOS RAM can be set to specific values or cleared to the system default values using the Setup Utility.  Also, CMOS RAM values can be cleared to the system defaults using jumper E0292.


EISA NON-VOLATILE RAM

For the common I/O devices, 8 KB of Flash memory is allocated to support EISA configuration data and system BIOS.  Using Flash memory relieves Xpress of the additional expense of a battery-backed CMOS component. The EISA configuration information in Flash memory is modified using the EISA Configuration Utility.


Enhancing Performance

Second Level Cache Resource

Concurrent Refresh

Posted I/O Write

I/O Recovery

Shadow Add-in Card BIOS

IDE + DMA

Video DRAM

Fast EISA --- 66 MB/second transfers


Second Level Cache Resource

Probably the single most critical resource concerning performance on the X-Series CPU module is the cache memory.  While a larger cache is clearly desirable, practical considerations of cost, board space, cache organization often dictate a realistic cache size.  In general, the X-Series Intel486 CPU modules operate in write-through mode and the X-Series Pentium processor modules operate in write-back mode.  For optimum performance set the cache resource for the Intel486/50 and all Pentium processor modules to write-back cache mode.  Remember that by disabling  the cache setting in the ECU, both the internal cache of the processor and the external secondary cache resource are turned off.


Concurrent Refresh

Intel engineers have demonstrated a direct performance benefit from reducing the refresh overhead by allowing concurrent CPU cycles and EISA refresh cycles.  This concurrence can increase performance by up to 7%. The gain is approximately 0.5μs out of the required 15.5μs refresh cycle.  Approximately half of the refresh overhead is "hidden" by the internal cache of the Intel486 CPU or Pentium processor.  The maximum refresh cycle duration during a concurrent refresh is 125ns.  The Xpress system architecture allows the CPU to access the memory bus concurrently with a refresh occurring on the EISA/ISA bus (if no EISA masters have requested the bus). If an EISA master is requesting the bus, the refresh cycle will be executed without any concurrency.


Posted I/O Write

All CPU memory writes to EISA memory (except 00H-FFH, 400H-4FFH, 800H-8FFH and C00H-CFFH) are posted on the Xpress system baseboard. A posted write is an event in which the required data is written to a buffer or register, so the Intel486 CPU or Pentium processor can begin a new cycle before the write cycle to the EISA memory agent is completed. This logic is relatively easy to engineer and inexpensive to implement, yet can produce dramatic system performance increases of 2% to 5% depending on the application and use of the EISA agents by the Xpress CPU-to-I/O subsystem.


I/O Recovery

The EISA bus specification for add-in board I/O command recovery time is different from the ISA bus. The Xpress baseboard contains the logic for meeting the EISA I/O recovery time while also fine-tuning this I/O cycle with the EISA bus snooping algorithm within the system BIOS. This can increase overall system performance by 2% to 5% depending on the EISA add-in cards being used.  If experiencing numerous memory parity errors or poor add-in video performance, then select standard for the normal I/O bus clock cycles on the EISA bus.

I/O Recovery Setting	8-bit Add-in Card	16-bit Add-in Card	32-bit Add-in Card
Standard	11 BCLKs	3 BCLKs	3 BCLKs
Enhanced	6 BCLKs	2 BCLKs	2 BCLKs


Shadow Add-in Card BIOS

Specific memory regions are designed to be moved to fast 32-bit Xpress memory, and they are also cached by the primary/secondary cache architectures located on the CPU module.  While these areas (C0000-C7FFF, C800-CFFFF, and E0000-E7FFF) are implemented to ensure video BIOS compatibility, Intel engineers have demonstrated that the BIOS of some disk controller and Ethernet add-in cards can be moved to these areas.  The shadowing of add-in card BIOS code to fast 32-bit Xpress memory can increase performance of the add-in card by as much as 40%. Special care must be taken concerning the system memory map.

Some EISA bus master cards have the capability to cache their own BIOS. A setting in the appropriate *.CFG file can be modified to read: CACHE=YES. If this setting uses address ranges C0000, C4000, C8000, or CC000, the Xpress baseboard will shadow the BIOS into 32-bit memory, write protect that 32 KB range (C0000-C7FFF or C8000-CFFFF) and allow code to be cached by the CPU module.  This setting in the *.CFG file will override the EISA Configuration Utility's setting for the C0000 and C8000 address ranges.  For example, the onboard AIC-7770 SCSI controller and the DPT SCSI controller add-in card configuration files on the Xpress ECU diskette automatically shadow and cache the SCSI BIOS when enabled/recognized by the Xpress system baseboard. Even though the SCSI BIOS is only 16 KB, the entire 32 KB block (either C0000-C7FFF or C8000-CFFFF) is shadowed and cached by the Xpress MECA component on the baseboard.


IDE + DMA

The IDE interface supports DMA (Channel #3) transfers up to 8 MB/second when a hard drive compatible with 16-bit DMA transfers is integrated in the system.  The system BIOS and a special DMA driver (available from the hard drive manufacturer) are required for the DOS/Windows operating system.  This will potentially double the IDE disk I/O subsystem performance.


Video DRAM

The Xpress baseboard integrates 512 KB of video DRAM. While this amount is compatible with virtually all Super VGA resolutions, some Extended VGA resolutions require more video memory. Four DIP sockets are available to install additional video DRAM up to 1 MB. Additional video DRAM will increase the available video resolutions and color palette, and it will slightly enhance overall video performance.


Fast EISA --- 66 MB/second transfers

In May of 1993, a group of leading personal computer system and expansion board manufacturers announced a new EISA specification.  The new specification is referred to as EISA-EMB (Enhanced Master Burst) which is compatible with existing EISA-based products, but allows burst transfers up to 66 MB/second.  A new add-in card is required to support this new burst transfer speed which doubles the current EISA-compatible add-in board capabilities.  The Xpress product line supports open standards which enhance the computer industry and ensure that EISA-based systems will provide the I/O performance needed for emerging high-speed server applications.  However with the strong presence of PCI add-in cards, the virtual non-existence of EISA-EMB add-in cards, and the planned introduction of Xtended Xpress baseboards, the OPSD Servers Business Unit has decided not to support the EISA-EMB capability.  Many of the Fast EISA proponents who said they would manufacture Fast EISA-EMB add-in cards have switched their priorities to manufacture PCI add-in cards instead.


Module and Baseboard TPS - Appendicies
Appendicies

BIOS Setup Options

Memory Map

Performance Overview

Reliability Measurements (MTBF)

Mechanical Specifications

Environmental Specifications

REGULATORY STANDARDS

Xpress System Baseboard and CPU Module Current Usage

Xpress CPU Modules and Accessories


BIOS Setup Options

The BIOS Setup utility is invoked during system boot by pressing [F1] at the countdown number 135 after completion of the Power-On Self-Test (POST). The utility includes the configuration items needed to allow the Xpress platform to boot from either the system floppy drive or the installed hard drive.  By clearing the NVRAM (jumper E0292) both the CMOS setup configuration and NVRAM configuration are reset to factory defaults.  These values assume that no hard drive is installed, an unknown single processor module is installed, but with a 3-inch floppy as drive A: is present.  The clearing of NVRAM assumes the user will immediately execute the ECU to fully configure the Xpress server platform.

The BIOS setup displays configuration information on four pages, which are accessed by using the Page Up and Page Down keys.  Pressing the [F2] key displays current system information such as the processor/coprocessor type, any reserved system memory, the BIOS version, the current video mode, enabled serial/printer ports, secondary cache and optional ROM code locations.  The [F4] key saves the BIOS Setup configuration, exits the Setup utility and reboots the system.  The [F5] function key loads known default configuration values (different then factory/NVRAM default values) for all four BIOS Setup utility pages for use with a Pentium processor module.  The [F6] function key exits the BIOS Setup utility without saving any changes that may have been made. Although the BIOS setup utility can fully configure the system, it is strongly recommended the EISA Configuration Utility (ECU) be used to set the system configuration.  The ECU ensures that the information located in Flash memory is synchronized with the configuration information stored in CMOS.

BIOS SETUP OPTIONS (PAGE 1)

BIOS Setup Field	Settings	Comments
System Time	Hour:Minute:Seconds
System Date	Month, Day, Year
Language	English French German Italian Spanish	Select the type of language for all help menus, system configuration menus and BIOS setup field selections.
Onboard Floppy	Enabled / Disabled	Selects onboard 82077SL floppy controller interface.
Diskette A	Disabled 5.25" 360KB  5.25" 1.2MB 3.5" 720KB 3.5" 1.44MB 3.5" 2.88MB	Select size and density of Drive A:
Diskette B	Disabled 5.25" 360KB  5.25" 1.2MB 3.5" 720KB 3 5" 1.44MB 3.5" 2.88MB	Select size and density of Drive B:
Onboard IDE	Enabled / Disabled	When disabled, an alternate hard drive controller may be added.
Hard Disk 1	Not Installed/ 1 thru 49	Selects HDD parameters. Types 48 and 49 are user-definable.
Hard Disk 2	Not Installed/ 1 thru 49	Same as Hard Drive #1 options.
User Definable Drives	48 and 49 2 and 3	Allows drive types 48 and 49 to be aliased to drive types 2 and 3 as well for Novell server applications.
Onboard SCSI	Enabled / Disabled	Only accessible if AIC-7770 SCSI controller is present.
SCSI BIOS Mapping	C0000H C8000H EC000H	Allows movement of where the AIC-7770 SCSI controller BIOS can be found.  The SCSI BIOS is automatically shadowed in 32-bit memory and cached by the CPU module.
BIOS SETUP OPTIONS (PAGE 2)

Video Type	Not Installed VGA/EGA Mono CGA80 CGA40	Select the type of video used in the system. Includes the onboard VGA controller or any add-in video card.
640 x 480 Mode Refresh	Non-Interlaced @ 60 Hz Non-Interlaced @ 72 Hz NonInterlaced @ 75 Hz	Selects the refresh rate frequency when the onboard video controller is in 640 x 480 mode.
800 x 600 Mode Refresh	Non-Interlaced @ 56 Hz Non-Interlaced @ 60 Hz Non-Interlaced @ 72 Hz	Selects the refresh rate frequency when the onboard video controller is in 800 x 600 mode.
1024 x 768 Mode Refresh	Interlaced @ 44/88 Hz Non-Interlaced @ 72 Hz Non-Interlaced @ 70 Hz Non-Interlaced @ 60 Hz	Selects the refresh rate frequency when the onboard video controller is in 1024 x 768 mode.
Video Fonts	9 x 16 / 8 x 16	Selects the default video font used by the system.
Onboard Video Controller	Primary / Secondary	Selects onboard WD90C31 as primary interface to the display. Secondary allows add-in card to become the primary interface while the onboard controller interfaces a second display.
OffBoard VGA/EGA Adapter Installed	No / Yes	This entry does not affect the onboard video, which must be enabled/disabled with the "VGA" jumper. See jumper E0290.
Keyboard	Not Installed / Installed	Detection of PS/2-style keyboard. The selection of "Not Installed" will still allow keyboard to function upon boot.
NumLock on at Boot	Yes / No	Select state of NumLock key upon system boot.
Password	Not Installed / Installed	Press + or - to enter. See jumper E0390 settings.
Keyboard Security Hot Key	Disabled	Not accessible with standard Xpress System BIOS.  Used by OEM with their own BIOS / Keyboard controller code.
POST Memory Test Prompt	Enabled / Disabled	When disabled, omits "Press Spacebar to Abort Memory Test" message on the video display.
POST Setup Prompt	Enabled / Disabled	When disabled, omits "Press F1 to Enter System Setup" message on the video display.
Boot Device Select	Diskette or Hard Drive Hard Drive Only	Allows the system to disable the ability to boot from floppy drive A. This BIOS feature has no effect if the floppy interface is controlled by a SCSI add-in card.
BIOS SETUP OPTIONS (PAGE 3)

BIOS Setup Field	Settings	Comments
Base Memory	512 KB 640 KB	Numeric value determined by the Power On Self Test (POST)
Extended Memory	0 KB to 383 MB	Numeric value determined by the Power On Self Test (POST)
Base Memory Above 512K	Enabled / Disabled	When disabled, allows add-in cards to use the 128KB memory space between 512K and 640K.
Speaker	Enabled / Disabled	Selects the speaker.
LCD	Enabled / Disabled	Option ENABLED on Xpress Deskside/MX chassis only.
Onboard Mouse	Enabled / Disabled	Selects onboard PS/2 mouse. When disabled, allows IRQ12 for other add-in card resources.
Parallel Port	Disabled Address 378H: Compatible/IRQ7 Address 278H: Bi-Direction/IRQ5 Address 378H: Bi-Direction/IRQ7 Address 278H: Compatible/IRQ5	Selects onboard printer port. LPT1 printer port address is 378H. LPT2 printer port address is 278H. Bi-directional mode is PS/2 compatible. Compatible mode is PC/AT Centronics compatible.
Serial Port 1	Disabled Address 3F8H/IRQ4 Address 2F8H/IRQ3 Address 3E8H/IRQ10	Select serial port as COM1 (3F8H), COM2 (2F8H) or COM3 (3E8H).
Serial Port 2	Disabled Address 2F8H/IRQ3 Address 3E8H/IRQ10 Address 2E8H/IRQ11	Select serial port as COM2 (2F8H), COM3 (3E8H) or COM4 (2E8H).
Console Redirection to COM1	Disabled 1200 baud 2400 baud 9600 baud	Allows the use of "scan-code" terminals to act as the system console. Disable option if not is use since this will affect overall system performance.
Console Redirection to COM2	Disabled 1200 baud 2400 baud 9600 baud	Same comment as above.
BIOS SETUP OPTIONS (PAGE 4)

BIOS Setup Field	Settings	Comments
CPU Speed	Fast / Slow	Sometimes known as Turbo and Deturbo modes. When in Slow mode, all cache resources are disabled and the CPU is slowed down to 8 MHz.
Cache	Disabled  Enabled-Write Through Enabled-Write Back	Selects both the internal CPU cache and secondary cache resources. Pentium processor and i486DX/50E CPU modules should be enabled with the write back option for optimum performance.  Intel486 CPU modules should enable the write-through cache technique.
I/O Recovery Time	Enhanced / Standard	Function to allow fast back-to-back I/O cycles if add-in cards allow it.  Adds approximately 2% to 5% system performance increase when in ENHANCED mode.
Posted I/O Write	Fast Standard Disabled	Function to allow zero wait state I/O write cycles to occur by posting I/O writes through registers. Adds approximately 2% to 5% system performance increase when set to FAST.
Concurrent Refresh	Enabled / Disabled	Function to allow the CPU to execute out of the cache while main memory is being refreshed. Adds approximately 1% to 7% system performance increase when ENABLED.
Shadow C0000H to C7FFFH	Enabled / Disabled	Selection to shadow any BIOS located at this address.
Shadow C8000H to CFFFFH	Enabled / Disabled	Selection to shadow any BIOS located at this address.
Shadow E0000H to E7FFFH	Enabled / Disabled	Selection to shadow any BIOS located at this address.
Onboard Video BIOS Mapping	To E0000H / C0000H	Selects starting locations of video BIOS.
Scan Flash User Area	Enabled / Disabled	Forces BIOS to search and execute any OEM source code located between EA000H-EBFFFH prior to system boot.
Multiprocessor APIC	Enabled / Disabled	Selection used with Dual Pentium processor only.  SMP= APIC enabled, ASMP=APIC disabled.
Tables B-1, B-2, B-3, B-4. BIOS Setup Options. (Default Values listed in Boldface)


Memory Map

HEX Address Range	Description	Size	Cache Enabled
00000-09FFFF	Base System Memory	640 KB	Yes
0A0000-BFFFF	Video RAM	128 KB	No
0C0000-C7FFF	Off board Video or other adapter BIOS, if shadowed by user	32 KB	No
0C8000-CFFFF	Adapter BIOS Extensions; can be shadowed by user	32 KB	No
0D0000-DFFFF	Adapter BIOS Extensions	64 KB	No
0E0000-E7FFF	WD90C31 Video BIOS; shadowed into memory	32 KB	Yes
0E8000-EFFFF	EISA Configuration Info.	32 KB	Yes
0F0000-FFFFF	System BIOS; shadowed	64 KB	Yes
100000-FFFFFFF	Extended Memory	15 MB	Yes
10000000-19FFFFFFF	More Extended Memory	368 MB	Yes

Table C-1, Figure C-1. Xpress System Memory Map


Performance Overview

Benchmark reports, summarizing the performance of the Xpress Desktop platform, Deskside/LX Mainstream server and Deskside/MX Premium server using the full range of CPU modules are available from your Intel representative or via the Intel Bulletin Board System.

Benchmark Test	90 MHz Pentium	66 MHz Pentium	Intel DX4	IntelDX2/66	i486 DX/50	i486 DX/33	i486 SX/25
PC Labs 8.0 Processor Harmonic	108.7	81.1	54.55	43.86	38.7	18.9	12.9
WinMark 4.0 (640x480x256)	10.5	9.07	7.91	6.11	5.79	2.8	1.9
SPECint92	79.8	62.73	51.4	31.8	28.9	18.9	N/A
Figure D-1, Table D-1. CPU Performance Overview.


Module and Baseboard TPS - Appendicies - Reliability Measurements (MTBF)
Reliability Measurements (MTBF)

Intel's OEM Products and Services Division (OPSD) provides Mean Time Between Failures (MTBF) values in a unique manner when compared to other PC server companies. The Server Business Unit performs a number of reliability runs which build a high level of confidence in the calculated numbers. Due to the wide versatility of the Xpress server systems and the sheer number of possible server platform combinations, it just isn't economical to have 20 systems in five ovens for 90 days to get MTBF data on one Xpress server configuration. Instead, the reliability runs incorporate 10-15 Xpress systems / baseboard platforms from the factory floor using different CPU modules, memory modules, and ad-in accessory cards in a couple ovens. OPSD logs the accumulated hours for the different items in the ovens and updates the MTBF values every three months. By using this methodology, we are continuously collecting demonstrated MTBF numbers on the various CPU modules, memory modules, baseboards, and server system components. Many customers use the predicted / demonstrated information to determine the level of spare parts and support models needed. Since the first Xpress platforms rolled off the factory floor three years ago, many of our customers have reported field-collected data showing a much greater MTBF value than shown below.

Product	Predicted MTBF	Demonstrated MTBF
Xpress Desktop w/ 16MB	21,993 Hrs. @ 35°C	NONE
Xpress Desktop w/ 8MB	26,462 Hrs. @ 35°C	NONE
Xpress Desktop w/ 4MB	29,455 Hrs. @ 35°C	115,259 Hrs. @ 40°C
Xpress/LX w/ 8MB	26,873 Hrs. @ 35°C	11,243 Hrs. @ 40°C
Xpress/LX w/ 16MB	26,508 Hrs. @ 35°C	NONE
Xpress/LX w/ SCSI & 8MB	26,471 Hrs. @ 35°C	11,243 Hrs. @ 40°C
Xpress/MX w/ SCSI & 16MB	23,667 Hrs. @ 35°C	NONE
Xpress/MX w/ SCSI & 8MB	23,844 Hrs. @ 35°C	13,878 Hrs. @ 40°C
Xpress 6-slot Baseboard	94,728 Hrs. @ 55°C	115,259 Hrs. @ 55°C
Xpress 8-slot Baseboard (w/SCSI)	62,176 Hrs. @ 55°C	20,914 Hrs. @ 55°C
Xpress 8-slot Baseboard (w/o SCSI)	65,719 Hrs. @ 55°C	41,029 Hrs. @ 55°C
100 MHz Pentium CPU Modules	176,066 Hrs. @ 55°C	14,072 Hrs. @ 55°C
90 MHz Pentium CPU Modules	176,066 Hrs. @ 55°C	14,072 Hrs. @ 55°C
66 MHz Dual Pentium CPU Module5	184,138 Hrs. @ 55°C	ON-GOING @ 55°C
X486DX2/66-B CPU Module	250,796 Hrs. @ 55°C	5,552 Hrs. @ 55°C
66 MHz Pentium CPU Module5	307,100 Hrs. @ 55°C	ON-GOING @ 55°C
60 MHz Pentium CPU Modules	386,309 Hrs. @ 55°C	14,072 Hrs. @ 55°C
X486DX/50 CPU Module	134,644 Hrs. @ 55°C	58,546 Hrs. @ 55°C
X486DX2/50 CPU Module	218,000 Hrs. @ 55°C	38,304 Hrs. @ 55°C
X486DX/33 CPU Module	218,012 Hrs. @ 55°C	27,547 Hrs. @ 55°C
X486SX/33 CPU Module	321,473 Hrs. @ 55°C	35,215 Hrs. @ 40°C
X486SX/25 CPU Module	218,050 Hrs. @ 55°C	65,930 Hrs. @ 55°C
BXMEM0 (w/8 MB total)	171,527 Hrs. @ 55°C	ON-GOING @ 55°C
BXECCMEM0 (w/8 MB total)	255,441 Hrs. @ 55°C	ON-GOING @ 55°C
XRAID960 add-in card	198,762 Hrs. @ 55°C	25,311 Hrs. @ 40°C
Server Management add-in card	97,307 Hrs. @ 55°C	ON-GOING @ 40°C
IDT 128 KB cache	25,825 Hrs. @ 35°C	13,413 Hrs. @ 55°C
Table E-1. Calculated Mean-Time-Between-Failures

1. The prediction methodology used Intel, vendor or Bellcore failure rates.

2.	Demonstrated MTBF values provided are limited by sample size and test time.

3.	Demonstrated values are at a confidence limit of 80%.

4.	Reliability statistics are shown for informal purposes only.

5. The heat spreader "projected wearout" value is 100,000 hours @ 60°C by the manufacturer and is not included in either dual or single Pentium processor module MTBF predicted calculations.


Mechanical Specifications

Dimensions	IntelDX4 CPU Module	i486DX/50 CPU Module	OverDrive Ready CPU Module	Old Two-Socket CPU Module
Width	7.20" (18.29 cm)	8.25" (20.95 cm)	7.20" (18.29 cm)	12.08" (30.68 cm)
Depth	4.85" (12.32 cm)	4.85" (12.32 cm)	4.85" (12.32 cm)	4.27" (10.85 cm)
Total Height	1.17" (2.97 cm)	1.28" (3.25 cm)	1.17" (2.97 cm)	1.69" (4.23 cm)
Weight (approx.)	0.66 lb. (0.30 kg.)	1.2 lb. (0.54 kg.)	0.65 lb. (0.29 kg.)	2.0 lb. (0.91 kg.)
Table F-1. Xpress i486-based CPU Module Dimensions

Dimensions	90 MHz Pentium CPU Module	Dual 66 MHz Pentium CPU Module	66 MHz Pentium CPU Module	60 MHz Pentium CPU Module
Width	12.32" (31.29 cm)	12.34" (31.34 cm)	7.38" (18.75 cm)	7.38" (18.75 cm)
Depth	4.85" (12.32 cm)	4.85" (12.32 cm)	4.85" (12.32 cm)	4.85" (12.32 cm)
Total Height	1.28" (3.25 cm)	1.88" (4.78 cm)	1.88" (4.78 cm)	1.58" (4.01 cm)
Weight (approx.)	0.78 lb. (0.35 kg.)	1.5 lb. (0.68 kg.)	0.75 lb. (0.34 kg.)	0.68 lb. (0.31 kg.)
Table F-2. Xpress Pentium technology based CPU Module Dimensions

Dimensions	ECC Memory Module	Parity Memory Module
Width	12.40" (31.50 cm)	12.40" (31.50 cm)
Depth	4.95" (12.57 cm)	4.95" (12.57 cm)
Total Height	1.24" (3.15 cm)	1.24" (3.15 cm)
Weight (approx.)	2.2 lb. (1.0 kg.)	2.1 lb. ( 1.0 kg.)
Table F-3. Xpress Memory Module Dimensions

Dimensions	8-Slot Baseboard	6-Slot Baseboard
Width	12.45" (31.62 cm)	10.45" (26.54 cm)
Depth	12.70" (32.26 cm)	12.70" (32.26 cm)
Total Height	0.550" (1.40 cm)	0.550" (1.40 cm)
Weight (approx.)	5 lb. (2.27 kg.)	5 lb. (1.61 kg.)
Table F-4. Xpress System Baseboard Dimensions


Module and Baseboard TPS - Appendicies - Environmental Specifications
Environmental Specifications

Parameter	Six-Slot Baseboard	Eight-Slot Baseboard
Ambient Temperature	Operating: 0°C to +50°C Non-Operating: -40°C to +70°C	Operating: 0°C to +50°C Non-Operating: -40°C to +70°C
Humidity	Operating: 85% RH at +55°C  Non-Operating: 95% RH at +55°C	Operating: 85% RH at +55°C Non-Operating: 95% RH at +55°C
Altitude	Operating: 10,000 ft. (3048 m) Non-Operating: 50,000 ft. (15,240 m)	Operating: 10,000 ft. (3048 m) Non-Operating: 50,000 ft. (15,240 m)
Static Discharge (ESD)	0 - 5KV (no errors) 5KV - 12KV (no hard errors) 12KV - 25KV (no damage)	0 - 5KV (no errors) 5KV - 12KV (no hard errors) 12KV - 25KV (no damage)
Shock	Operating: 2.0g, ½ sine, 11ms duration Non-Operating: 30g, ½ sine, 11ms duration	Operating: 2.0g, ½ sine, 11ms duration Non-Operating: 30g, ½ sine, 11ms duration
Table F-5. Xpress Baseboard Environmental Specifications


REGULATORY STANDARDS

The Xpress Desktop, Deskside/LX, Deskside/MX, and CPU Module products meet or exceed the following regulatory requirements:

Ergonomics	Germany	ZH1/618

Safety	U.S.	UL 1950, 1st edition

Canada	CSA C22.2 #950-M89; Xpress/LX and Xpress/MX

Canada	CSA C22.2 #220; Xpress desktop

Europe	TUV to EN 60950, IEC 950

Nordic	NEMKO EN60 950, EMKO-TUE(74-SEC) 203 T/90

Australia	AS3260-1988

Emissions	U.S.	FCC Class B CFR #47 Parts 2 and 15, Certified Class B

Canada	DOC CRC c.1374 Class B

Germany	VDE 0871/6.78 Class B

Germany	Vfg 1046/1984

Europe	CISPR 22/85 Class B

Japan	VCCI Class 2 ITE


Xpress System Baseboard and CPU Module Current Usage

The values shown below are measured levels with the Xpress systems executing an MS-DOS application. The maximum amperage shown below calculates the maximum current (worst case) of every component on that product. Please note that adding SIMMs to the memory module does not severely increase the amperage values because the interleaving circuitry has only one memory bank active at a time.

Product	+5 volts (typical)	+5 volts (maximum)
Xpress Baseboard (w/32MB installed)	3.2 amps	5.4 amps
66 MHz Dual Pentium Module	11.9 amps	17.4 amps
100 MHz Pentium Processor Module	1.2 amps	1.8 amps
90 MHz Pentium Processor Module	1.2 amps	1.8 amps
66 MHz Pentium Processor Module	5.8 amps	8.4 amps
X486DX2/66 Module (w/128K cache)	2.5 amps	4.3 amps
60 MHz Pentium Processor Module	5.4 amps	8.4 amps
X486DX/50 Module (w/256K cache)	4.5 amps	8.2 amps
X486DX2/50 Module (w/128K cache)	3.3 amps	4.3 amps
X486DX/33 Module (w/128K cache)	4.2 amps	5.8 amps
X486DX/33 Module (no cache)	3.2 amps	4.3 amps
X486SX/33 Module (w/128KB cache)	3.0 amps	4.3 amps
X486SX/25 Module (no cache)	3.0 amps	4.3 amps
BXMEM0 with 8 MB installed	1.1 amps	2.2 amps
BXMEM0 with 64 MB installed	1.4 amps	2.2 amps
BXMEM0 with 256 MB installed	1.5 amps	2.2 amps
BXECCMEM0 with 16 MB installed	5.0 amps	7.2 amps
BXECCMEM0 with 64 MB installed	5.2 amps	7.3 amps
BXECCMEM0 with 384 MB installed	5.5 amps	7.4 amps
XRAID960 add-in card (w/4MB)	3.2 amps	3.5 amps
Server Management	0.1 amps	0.2 amps
IDT Cache (128 KB)	1.2 amps	1.5 amps
3.5-inch Floppy Drive	0.4 amps	1.2 amps
EISA Bus Slot	2.0 amps/slot	4.5 amps/slot
Table F-4. Xpress System Current Usage


Xpress CPU Modules and Accessories

BXCPUPENT100

Pentium processor module, 66/100 MHz, 82497DX cache controller, 82492DX, 512 KB write back SRAM cache.

BXCPUPENT90

Pentium processor module, 60/90 MHz, 82497DX cache controller, 82492DX, 512 KB write back SRAM cache.

BXCPU2XPENT66

Dual Pentium processor module @ 66 MHz, two 82496DX cache controllers, two 82489 Advanced Programmable Interrupt Controllers, and 82491DX with 256 KB write back SRAM cache for each processor.

BXCPUPENT66

Pentium processor module, 66 MHz, 82496DX cache controller, 82491DX with 256 KB write back SRAM cache.

BXCPUPENT60

Pentium processor module, 60 MHz, 82496DX cache controller, 82491DX with 256 KB write back SRAM cache.

BXCPU486100-C

IntelDX4 processor module, 33/100 MHz, Intel write back cache controller, with 256 KB write back SRAM cache, and OverDrive processor socket. ECC Memory module-compatible.

BXCPU486DX266-C

IntelDX2 processor module, 66 MHz, Intel write back cache controller, with 256 KB write back SRAM cache, and OverDrive processor socket. ECC Memory module-compatible.

BXCPU486DX266-B

IntelDX2 processor module, 66 MHz, with 128 KB cache and OverDrive processor ZIF socket.

BXCPU48650

Intel486 DX processor module, 50 MHz, 82495DX cache controller, 82490DX, 256 KB write back SRAM cache.

BXCPU486DX250

IntelDX2 processor module, 50 MHz, socket for 64 KB / 128 KB cache.

BXCPU48633-B

Intel486 DX processor module, 33 MHz, socket for optional 128 KB cache, and OverDrive processor ZIF socket.

BXCPU486SX33-B

Intel486 SX processor module, 33 MHz, with 128 KB cache and OverDrive processor ZIF socket. Built to Order with minimum quantity of 20 (bulk pack) CPU modules.

BXCPU486SX25-B

Intel486 SX processor module, 25 MHz, with 128 KB cache and OverDrive processor ZIF socket.

SVRMONUSBLK / SVRMONEURBLK

ISA add-in server management card with agent and console software. Bulk package of 25 kits. The USBLK contains a North American PCMCIA modem. The EURBLK contains an international PCMCIA modem solution.

BXECCMEM0

Error Checking and Correcting Memory Module,  no SIMMs installed. Kit contains operating system drivers for logging single and double-bit errors. Upgradable to 384 MB.

BXMEM0

Xpress Parity Memory Module, no SIMMs installed. Upgradable to 256 MB.

CACHEMOD128

IDT 128 KB write-though cache for Xpress two-socket (-A) CPU modules.

XBOTFLPKIT

Kit to install a 3.5-inch floppy in the accessible bottom peripheral bay in the Xpress Desktop platform.

XDT5THBAY

Complete kit to install a 3.5-inch hard drive vertically in the Xpress Desktop platform.

XDIAGNOSTICS

Xpress Server Diagnostics. Already integrated into Deskside/MX server.

XDTSTAND

Xpress Desktop vertical stand.

XECUOEMKIT

Xpress ECU gold license kit with adaptation kit and manuals.

XEXTSCSICBL

SCSI cable to route SCSI-2 signals to external peripheral. For Deskside/MX and Deskside/LX platforms only.

XLXSCSICBL

Seven-connector SCSI cable for Deskside/LX system without the integrated AIC-7770 SCSI controller. Already integrated in Deskside/LX system which has the integrated, onboard SCSI controller.

XPRESSDOC

Xpress Desktop/Deskside LX/Deskside MX manuals in MS Word 2.0 format.

XRAID4

EISA add-in card  with software drivers/utilities. RAID-ready XRAID960 SCSI disk controller with 4 MB cache memory installed.

XPRRMFILTER

Removable XpressRACK cartridge air filters.


System Level Features

Figure 1. Xpress System Architecture.

Related Topics:

System Architecture

System I/O Architecture

System BIOS Enhancements

Performance Enhancements


System Architecture

Six or Eight EISA bus master slots utilizing the Intel 82350DT chip set:

•	EISA Bus Controller (EBC:  Intel 82358DT)

•	Integrated System Peripheral (ISP:  Intel 82357)

•	EISA Bus Buffer (EBB:  Intel 82352)

Two Xpress CPU/Memory slots integrated with the Xpress chip set:

•	Xpress Memory to EISA Control (MECA:  Intel 82356CS)

•	Xpress RAS/CAS DRAM Control (RCA:  Intel 82356DS)

•	Xpress Data Path Parity (DPP:  Intel 82353DS)

•	Common I/O Controller (CLASIC:  Intel 82351DS)


System I/O Architecture

•	Two serial ports, one parallel port, PS/2 keyboard and mouse ports

•	Dallas DS1287 Real Time Clock with an estimated lithium battery life of ten years

•	Floppy interface with Intel 82077SL able to support up to four peripherals using 360 KB, 720 KB, 1.2 MB, 1.44 MB and 2.88 MB double/high density media

•	8/16 bit CAM 2 (or faster) IDE standard 40-pin interface

•	Western Digital WD90C31 graphics controller with Super VGA support

•	Sierra HiColor RAMDAC capable of displaying 32,000 colors in popular applications

•	Adaptec 7770 32-bit SCSI-2 controller with two independent Fast/Narrow SCSI channels


System BIOS Enhancements

The BIOS Setup program has been enhanced to take advantage of the baseboard features:

•	Onboard IDE hard drive interface Enable/Disable with DMA transfer support.

•	640x480 Mode Refresh Rate: Non-interlaced modes of 60/72/75 Hz. Allows the user to set a refresh rate appropriate to the monitor to obtain the sharpest display.

•	800x600 Mode Refresh Rate: Non-interlaced modes of 56/60/72 Hz.

•	1024x768 Mode Refresh Rate: Interlaced at 44 - 88 Hz  or Non-interlaced at 60/70/72 Hz.

•	Memory Test Prompt, POST Setup Prompt: Allows the user to suppress the video display prompts for "memory test" and "Press F1 to enter Setup."

•	AIC-7770 SCSI BIOS: Allows the user to select a primary SCSI channel, SCSI ID, SCSI interrupt level, and SCSI I/O address.

•	EISA Bus Performance Features: EISA I/O Recovery Time, Posted I/O Write, and Concurrent Refresh options. Changes various EISA bus timings to allow for back-to-	back I/O cycles, zero wait state I/O write cycles, and the memory refresh timing to enhance overall system performance.

•	Shadow Memory Options: Allows specified 16 KB blocks of memory from C0000H to DFFFFH to be shadowed into onboard 64-bit DRAM. Primarily used to shadow expansion card ROM to increase performance of Adaptec, DPT, Mylex, Novell, Intel, and similar EISA/ISA add-in cards.

•	Boot Device Control: Allows the system to boot from either the hard drive or floppy drive A: (as normal) or to boot only from the hard drive.

•	Scan Flash User Area: Scans the Flash memory area between EA000H to EC000H in the system BIOS for a BIOS signature. If detected, the system BIOS will execute the source code after the POST is complete but prior to system boot up. This allows OEMs to customize the BIOS by adding any custom code to the Flash memory device.


Performance Enhancements

•	IDE interface supports DMA (DMA#3) transfers up to 8 MB/second when a 16-bit DMA transfer compatible hard drive is integrated in the system. This could potentially double the IDE disk I/O subsystem performance.

•	Concurrent refresh reduces the system memory refresh overhead by allowing simultaneous CPU/cache cycles and EISA refresh cycles. This can increase overall system performance by as much as 7% in a full-featured Xpress system.

•	512 KB of Video DRAM is integrated on the baseboard. Four DIP sockets are available to install additional video DRAM up to 1 MB. The video 	resolutions, color palette increase, and video performance is slightly faster.

•	All CPU write cycles to an EISA agent are posted to allow a new CPU cycle to 	occur before the previous write cycle is actually completed. This can increase overall system performance by 2% to 5% depending on the application and use of 	the EISA agents by the Xpress CPU-to-I/O subsystem.

•	Shadowing of add-in card BIOS code to fast 32-bit Xpress memory can increase performance of the add-in card by as much as 40%.

•	The EISA bus specification for add-in board I/O command recovery time is different from the ISA bus. The Xpress baseboard contains the logic for meeting the EISA I/O recovery time while also fine-tuning this I/O cycle with the EISA bus snooping algorithm within the system BIOS.


Desktop Chassis Features

The Xpress Desktop system offers six EISA slots, four peripheral bays, and a 215 watt auto-ranging power supply. The 17.3-inch wide small footprint chassis is fabricated using electrogalvanized metal to minimize EMI/RFI, and may be mounted in a 19-inch rack. Only two thumbscrews connect the top cover to the chassis, allowing easy access to the desktop interior.

Two 5¼-inch halfheight bays and two 3½-inch bays offer excellent expandability. The front panel provides access to both 5¼-inch bays and the top one inch of a 3½-inch bay (allowing installation of a low profile peripheral using a special carrier kit available from Intel). The other 3½-inch bay allows installation of a hard drive on top of the power supply. The standard Xpress Desktop configuration incorporates a 3½-inch Teac FD235HF 217U floppy drive, which supports both 720 KB and 1.44 MB media. An IDE hard drive is not included.

In order to provide maximum cooling with minimum noise, a variable speed fan cools the interior chassis (along with the power supply's internal fan). The fan speed is determined by the temperature inside the chassis. If the system is configured without add-in cards or extensive peripherals, the fan will spin at a much slower rate than if the system has devices in all of its EISA slots.  The Xpress Desktop system has been designed and tested with all X-Series Intel486 SX, Intel486 DX, IntelDX2, and IntelDX4 CPU modules.  The chassis has also been tested with the 60, 66, 90, and 100 MHz Pentium processor modules.  The dual Pentium processor module is not supported in the Xpress Desktop system.

Figure 2. Xpress Desktop Chassis Dimensions.

The front panel includes reset and poweron/off switches, plus LEDs to indicate hard disk activity and system poweron. A mechanical lock secures the top cover to the system chassis, but does not prevent keyboard input. Unique keys are used for additional security.

The Xpress Desktop back panel provides connections to all of the necessary onboard resources, including: AC power input, AC monitor power output, PS/2 mouse and keyboard connectors, 9-pin serial ports 1 and 2, a 25-pin parallel port, a 15pin analog VGA connector, and six EISA bus master slots.

The auto-ranging Teapo 215 watt power supply switches between 110V and 220V AC inputs, supporting use in all parts of the world without requiring a switch change. The power supply also provides an AC output for monitors with line voltage ratings matching the input line voltage. The power supply has five DC peripheral connectors;  two mini-output connectors for use with 3½-inch peripherals and three standard TTL output connectors for use with 5¼-inch peripherals or 3½-inch hard drives. The power supply fan transfers air at a rate of 120 linear feet/minute (lfm) from the exhaust port to assist in cooling the system baseboard. The EISA slots are numbered one through six, starting from the left.

The Xpress Desktop system offers excellent system security. A password can be enabled during system boot-up using either the BIOS Setup utility or the EISA Configuration Utility (ECU). If the password is forgotten, a jumper can be repositioned to clear the password entry from CMOS RAM. A jumper also controls diskette read/write protection, preventing users from copying information to a diskette in the 3½-inch drive. To protect the Flash configuration information, a jumper can disable writing to the Flash memory device, preventing users from updating the system BIOS, using the Setup utility, or configuring the system using the EISA Configuration Utility (ECU) diskette. The Desktop chassis keylock protects these jumpers.


Deskside/LX Mainstream Server Chassis

The new Deskside/LX offers eight EISA bus master slots, nine peripheral bays, and a 230 watt power supply in a 20-inch high chassis fabricated using electrogalvanized (EG) metal to minimize EMI/RFI. The system is specifically designed to help OEMs create high performance servers, and it supports all Intel486 SX, DX, DX2, IntelDX4, and Pentium microprocessors while setting new standards in serviceability and upgradability.

Figure 4. Deskside/LX Mainstream Server Chassis Dimensions.

The exterior side cover is held in place using  two screws for easy access to the interior peripherals, power supply, fan/speaker assembly, and the system baseboard compartment. An internal sheet metal cover provides both EMI/RFI isolation on the processor compartment and proper airflow.

Four internal half-height 3½-inch bays provide room for more than 5 GB of hard disk expansion. An additional internal 3½-inch drive bay (located near the power supply) can easily accept two of the newer low-profile one-inch-high IDE hard drives. The four internal bays have been designed to allow easy setup of Redundant Array of Inexpensive Disks (RAID) applications. Examples of RAID system setups are available in a separate document and also can be found on the Intel Bulletin Board System.

Three 5¼-inch half-height external bays are available for backup or removable media devices. A full-height 5¼-inch device can be installed in place of two half-height devices. However, use of a 5¼-inch hard drive is not recommended because the drive may generate substantial electrical interference (EMI), increase static electricity grounding susceptibility (ESD), or cannot be properly cooled per the drive manufacturer's requirements. The standard Deskside/LX configuration incorporates a 3½-inch Teac FD235HF 217U floppy drive.

The Deskside/LX system incorporates an Astec 230 watt power supply with a switch for selecting either 110V or 220V AC input, supporting use in all parts of the world. The power supply has nine DC peripheral connectors for the accessible drive bays;  one mini-output connector for use with the 3½-inch floppy drive and eight TTL output connectors for use with 5¼-inch peripherals or 3½-inch hard drives. The power supply fan transfers air at a rate of 100 - 200 linear feet/minute (30 cfm) from the exhaust port to cool the baseboard and the external peripherals.  It also moves hot air out of the Xpress Deskside/LX server system .

A second variable speed fan is provided for system reliability with a minimum of noise. The fan speed (maximum 90 cfm) is determined by an integrated thermistor measuring the internal air temperature. If the system is configured without add-in cards or extensive peripherals, the fan will determine the ambient temperature and the drive(s) power dissipation and spin at a much slower rate than if the system is configured with all slots and bays filled.  The Xpress/LX Deskside system is designed to allow all X-Series Intel486 SX, Intel486 DX, IntelDX2, and IntelDX4 CPU modules.  The chassis has also been tested with the 60, 66, 90, and 100 MHz Pentium processor modules.  The dual Pentium processor module is not supported in the Xpress/LX Deskside server because the 230 watt power supply cannot handle a fully loaded (8 EISA add-in cards, 4 large capacity hard drives and an ECC memory module) system.  The chassis is pressurized to allow airflow across the lower four peripheral bays, the upper three accessible bays and the remaining peripheral bay near the power supply. Removing the side cover panel disrupts this airflow and will affect the long term reliability of the peripherals.

The front panel on the Deskside/LX server provides access to the three external peripheral bays, the system reset, poweron/off and keyboard/mouse lock switches. Four LEDs display system activities: two green LEDs for IDE or SCSI hard disk activity and two green LEDs for system poweron and keyboard/mouse lock. The front panel is protected by a mechanically lockable front door. Unique keys provide additional security. A master key option is available as a spare parts item. A chassis lock also can be added to the system to prevent removal of the side panel and access to internal components.

The back panel provides connections to all of the necessary onboard resources: AC power input, PS/2 mouse and keyboard connectors, serial ports 1 and 2, a 25-pin parallel port, a 15pin analog VGA connector, and eight EISA slots. The EISA slots are numbered one through eight, starting from the top. Table 2 shows the electrical arrangement of EISA Masters in the Xpress Deskside/LX system:

EISA Slot	EISA Master Number
1	Master 0
2	Master 1
3	Master 2
4	Master 3
5	Master 4
6	Master 5
7	Master 6
8	Master 7
Table 2. Deskside/LX EISA Slot and Bus Master Arrangement.

Early Xpress Deskside/LX baseboards (PBA #519801-001) may only support six EISA bus master slots due to the design of the EISA Bus Controller. In this particular case, slots 1 and 2 do not support bus masters while slots 7 and 8 are designed as the EISA Master slots to benefit configurations with two controllers close to the hard drive bays.


Deskside/MX Premium Server

The Xpress Deskside/MX is specifically designed to help OEMs create high performance servers while setting new standards in serviceability and upgradability. The 24-inch high chassis houses eight EISA slots, eleven peripheral bays, a 384 watt auto-ranging power supply, and is fabricated using electrogalvanized (EG) metal to minimize EMI/RFI. Easy access to the interior is provided by only two thumbscrews on the side panel. A metal sheet, fastened with two screws, covers the processor compartment to provide for proper airflow, but slides out to allow access to the CPU and memory modules, onboard system memory, and any add-in cards. A side cover lock secures the side panel to the Deskside/MX server chassis.

Eight internal 3½-inch half-height bays provide over 20 GB of hard disk expansion using today's 2.4 GB hard drive technology. The eight bays have been designed to allow easy setup of Redundant Array of Inexpensive Disks (RAID) applications. This can be further facilitated by using the integrated SCSI Distribution Board. Three external 5¼-inch half height bays are available for backup or removable media devices. The standard Deskside/MX configuration incorporates a 3½-inch Teac FD235HF 217U floppy disk drive, which supports both 720 KB and 1.44 MB media. A 5¼-inch full-height device also can be fitted in place of two half height devices. A 5¼-inch hard drive is not recommended because it could generate substantial electrical interference (EMI) and increase static electricity grounding susceptibility (ESD).

Figure 5. Xpress Deskside/MX Chassis Dimensions.

The front cover on the Deskside/MX server provides access to the three external peripheral bays, system reset switch, poweron/off switch and a switch to disable keyboard/mouse input. Four LEDs display system activity: two green LEDs for IDE or SCSI hard disk activity and two green LEDs for system poweron and keyboard/mouse lock. The switches and LEDs are mounted on the front panel printed circuit board which also terminates the SCSI Bus for any 5¼-inch SCSI peripherals, and it contains a connector for the LCD module. An application note concerning use of the LCD module may be ordered from Intel literature (order #281398-002) and is also available on the Intel Bulletin Board System. The Deskside/MX front panel is protected by a mechanically lockable front door. Unique keys are used for additional security. A master key option is available for both the front panel and side chassis locks as a spare parts item.

Connections to all of the necessary onboard resources are provided from the system back panel: AC power input, PS/2 mouse and keyboard connectors, serial ports 1 and 2, a 25-pin parallel port, a 15pin analog VGA connector, and eight EISA slots. The slots are numbered one through eight, starting from top to bottom. The table below shows the electrical arrangement of EISA Masters in the Deskside/MX system:

EISA Slot	EISA Master Number
1	Master 0
2	Master 1
3	Master 2
4	Master 3
5	Master 4
6	Master 5
7	Master 6
8	Master 7
AIC-7770	Master 8
Table 3. Deskside/MX EISA Slot and Bus Master Arrangement.

The Astec 384 watt auto-ranging power supply automatically switches between 110V and 220V AC inputs, supporting use in all parts of the world. The power supply has three DC peripheral connectors for the accessible drive bays; two mini-output connectors for use with 3½-inch floppy drives and one TTL output connector for use with 5¼-inch peripherals or a 3½-inch hard drive. A separate connector provides power directly to the SCSI Distribution Board. An extra power switch and a 4-pin miniature DIN female connector are available to remotely start or stop an external expansion unit (See Appendix E).

The power supply fan transfers air at a rate of 250 - 300 linear feet/minute (35 cfm) from the exhaust port to cool the baseboard and peripherals. In order to provide additional cooling with minimum noise, a variable speed fan (100 cfm) also helps cool the chassis interior. The fan speed is determined by the air temperature and the number of the 3½-inch hard drives in the bottom peripheral bays. If the system is configured without add-in cards or extensive peripherals, the fan will spin at a much slower rate than if the system has all of its slots full. The Deskside/MX system has been tested with all X-Series CPU modules through the 100 MHz and dual Pentium processor modules. The Deskside/MX is pressurized internally to allow needed airflow across the bottom eight bays. Removing the side cover or processor compartment panel disrupts the airflow and will affect long term reliability.

The Deskside/MX Premium Server was designed for easy installation, upgradability and maintenance of the disk subsystem. The SCSI Distribution Board minimizes cabling for power and control from disk controllers and the power supply to the drive bays. The TwinChannel* Adaptec AIC-7770 SCSI-2 controller integrated on the system baseboard eliminates the need to install SCSI controllers in the expansion slots. Because the SCSI bus has a limit of seven peripheral devices, two controllers (or the integrated TwinChannel Adaptec controller) are needed to utilize all 11 peripheral bays.

With today's disk drive performance and the EISA bus bandwidth, it is fairly easy to saturate the SCSI bus on most systems with only three to five hard drives. The Xpress SCSI Distribution Board allows the user to have one continuous SCSI bus for access to all 11 bays. Users need only to set the SCSI device ID for the disk or tape drives and install the peripherals on the SCSI bus. Because the distribution board takes care of terminating the SCSI bus, all terminating resistors should be removed from SCSI devices. This saves the system integrator from having to determine which devices are physically located at each end of the SCSI bus and removing the termination resistors from only those two devices as required on virtually all other PC server systems. The SCSI Distribution Board allows either SCSI-1 (5 MHz) or Fast SCSI-2 (10 MHz) data transfers to the 3½-inch hard drives.

The SCSI distribution board is versatile in its design for handling two SCSI controllers.

Figure 6. SCSI Distribution Board using two controllers.

In the configuration shown in Figure 6, the first SCSI channel, SCSI  1, has four hard disks with their IDs set to 0-3. The second channel, SCSI  2, drives an additional four hard disks with their IDs set to 0-3 and up to three more SCSI devices such as tape drives or CD-ROM. The Deskside/MX is ideal for setting up a high performance server based on Redundant Arrays of Inexpensive Disks (RAID). Additional information on how to set up RAID subsystems, how to fully utilize the optional two-channel Intel SCSI XRAID960 EISA add-in card, and easy step-by-step configuration guidelines/hints for various network operating systems can be found on the Intel Bulletin Board System or in a separate Xpress Disk Array Application Note (order #281563-001).


System Accessories

Each Xpress system is shipped with an accessory kit, including:

•	Three-foot power cord

•	X-series product manual

•	EISA Configuration Utility (ECU) diskette

•	Video drivers and utilities diskette

•	Diagnostics diskette (included with Deskside/MX only)

•	Adaptec SCSI drivers (included with Deskside/MX and Deskside/LX)

•	Flash Language Update (FLUP) Diskette

Related Topics:

EISA Configuration Utility

Video Drivers and Utilities

Diagnostics

Adaptec SCSI Drivers


EISA Configuration Utility

The ECU provides the same functionality as the BIOS Setup utility (programming the system configuration stored in Flash memory), but more importantly allows the configuration of EISA add-in cards. The EISA configuration stored in the Flash component (E8000-EFFFF) is used by the system BIOS at boot up to configure EISA boards and determine system policies.

The EISA Configuration Utility can be run from a floppy drive or the files can be copied to the hard drive for considerably faster operation. The ECU requires an extended memory manager, such as HIMEM.SYS, to provide added memory resources for large EISA configurations. Without a memory manager in the CONFIG.SYS file, the ECU runs out of memory when three or more EISA host adapter cards are installed. The system must be rebooted and reconfigured with the ECU to correctly save the new information when an EISA board is added or removed.

The base software for the ECU is produced and licensed by Micro Computer Systems, Inc.  They provide a set of configuration (*.CFG) files which are used to construct additional add-in board feature extensions. The files use the configuration language defined in the EISA Specification document. The language allows both EISA and ISA parameters to be defined (including jumper, switch, and I/O settings) for a particular add-in card. The configuration files are not required for ISA add-in cards to operate in the EISA-based Xpress systems. However, system integrators should use the configuration file for ISA add-in cards since this informs other EISA/ISA cards which interrupts and DMA channels are in use. The Intel BIOS Engineering Group adds specific options and custom features unique to the Xpress baseboard parameters, CPU module parameters, and memory module information. The various configuration options include caching, serial and parallel ports, date, time, onboard floppy controller, and hard drive type plus many other options. A complete list of ECU Options is in Appendix B.


System TPS - System Accessories - Video Drivers and Utilities
Video Drivers and Utilities

Video drivers and utilities for DOS applications are shipped with all Xpress Desktop, Deskside/LX, and Deskside/MX platforms. Included are enhanced mode drivers for common software applications such as AutoCAD, Lotus 1-2-3, Windows 3.0 and 3.1, and WordPerfect.  These come in a compressed form and are extracted using an installation utility on the diskette. Several video utilities such as a screen saver and VGA mode switch routine also are included with the drivers.  A list of the drivers and utilities shipped with each Xpress system is included in Appendix H.

Users of the SCO, USL, Solaris, NextStep, USG/Novell. and ISC UNIX operating systems should check with their UNIX vendor for high resolution video driver support for the integrated WD90C31 video controller.


Diagnostics

The Xpress diagnostic diskette is shipped with the Deskside/MX and is available as an option (XDIAGNOSTICS) for the Deskside/LX and Desktop systems. The diagnostic code can be executed out of RAM disk (floppy-less systems), from the self booting floppy diskette or from the hard drive.

1.	POST: Reports errors which may have occurred during POST. All information is read from CMOS RAM.

2.	CPU: Tests the clock speed, cache presence and internal CPU Built in Self Test algorithm.  A dual Pentium processor module test is also included.

3.	KB: Reports errors concerning the keyboard controller, PS/2 mouse or keyboard ports, or keyboard LEDs.

4.	VIDEO: Tests the WD90C31 video controller, video DRAM, video RAMDAC, video oscillator and associated video circuitry. The operations of the video controller at low (640x480) and high (1280x1024) resolutions are verified.

5.	MOUSE: Reports errors in the software and hardware interaction of the mouse interface. Requires the appropriate mouse driver.

6.	RTC: Tests the CMOS RAM, real time clock and battery.

7.	PIC: Reports errors concerning the interrupt logic (master/slave and RTC interrupts) on the system baseboard.

8.	PIT: Tests the single (or dual) programmable interval timer modes, refresh and speaker timers.

9.	DMA: Reports errors in the data integrity of the onboard Direct Memory Access controller with DMA page registers, DMA address register, count registers, DOS data sent to floppy using BIOS calls. The last two tests require a formatted floppy in either drive A: or drive B:.

10.	PARALLEL: Tests the parallel port industry using standard loopback connector. See help file for wiring information.

11.	COM1/COM2: The module reports errors with the onboard serial ports using a standard loopback connector.

12.	HARD1/HARD2: Tests the hard drive at the BIOS INT 13H level of compatibility. These are destructive tests which should be executed on raw hard drives with no data. Compatible with SCSI, ESDI, and IDE hard drives.

13.	FLOPPY: Reports errors concerning installed floppy drives. A blank formatted floppy is required in either drive A: or Drive B:.

14.	DRAM: Tests the data integrity of system memory and CPU/cache subsystem. Over a dozen tests are performed on the amount of memory (up to 384 MB) determined by the CMOS RAM information upon system power on.  Both parity and ECC memory specific tests are included.

15.	CACHE: Reports any data integrity errors in the internal CPU/cache and any secondary cache.

16.	SCSI DRIVE 0 THROUGH 6: Tests the SCSI disk I/O subsystem using over a dozen scripts with an Adaptec 1540 or 1740 add-in controller, Adaptec 7770 or compatible host adapter. The script assumes the Adaptec BIOS is enabled and located at a base I/O of 330H.


Adaptec SCSI Drivers

The Xpress 8-slot baseboard found in the Deskside/MX (or optionally in the Deskside/LX) servers contain the Adaptec AIC-7770 TwinChannel SCSI-2 controller. This component supports fast and narrow SCSI to transfer data at 10 MB/second and command execution time of only 35μs, compared with the typical 350μs of  other fast SCSI implementations. The AIC-7770 is viewed as a bus master (slot 9) on the Xpress Rev-C baseboard, which can burst 32-bit data onto the I/O bus at the peak EISA bandwidth speed of 33 MB/second. The highly integrated AIC-7770 connects directly to the EISA bus, virtually eliminating I/O bus control and compatibility issues.

The AIC-7770 core contains two 8-bit SCSI channels which simultaneously supports single-ended system configurations. Because there are two independent channels, the Xpress baseboard can support up to 14 fast SCSI peripherals. The controller has an extended translation for large hard drives (greater than 1 GB and up to 18 GB) directly from the system BIOS and a multi-threading capacity to handle four simultaneous I/O tasks for Windows NT, UNIX, or OS/2 operating systems. The AIC-7770's RISC-based PhaseEngine sequencer automates SCSI commands and reduces interrupts, transfer overhead, and driver concerns. By combining the RISC PhaseEngine with a 256-byte FIFO buffer, maximum DMA transfers result in outstanding overall system throughput.

The AIC-7770 BIOS is located in the system BIOS and automatically shadowed into fast 32-bit system memory and cached by the CPU module. The SCSI controller is enabled and highly configurable using the EISA Configuration Utility (ECU).

Operating System	AIC-7770 SCSI Driver	Dual Pentium
Novell 3.11, 3.12, 4.0	Ships with Xpress/MX
Microsoft OS/2 1.3	Ships with Xpress/MX
IBM OS/2 2.0,  2.1, 2.11 SMP	Ships with Xpress/MX
SCO UNIX System V 4.0 & 4.2	Ships with Xpress/MX
Banyan 5.53, 5.54	Ships with Vines
Sunsoft Solaris UNIX 2.1, 2.4	Ships with UNIX
Interactive/UNIX 3.2.4, Release 4	Available Q4-94
USL UNIX System V Release 4	Intel BBS
Novell UnixWare 1.0, 2.0	Intel BBS
Windows NT 3.1, 3.5	Ships with NT
Windows 3.0	Ships with Xpress/MX
Windows 3.1	Ships with Xpress/MX
Specific DOS Applications	Ships with Xpress/MX
Table 5.  Adaptec SCSI Driver Support.


System TPS - Appendicies
Appendicies

EISA Configuration Utility Options

System Interrupts

Baseboard Connectors

I/O Control Ports

Supported Peripherals

Video Drivers and Utilities

Reliability Measurements (MTBF)

Environmental Specifications

Regulatory Standards

System Product Codes


EISA Configuration Utility Options

ECU Setup Field	Settings	Comments
System Processor Module	Not User Selectable	Value determined by system BIOS
Multi-Processing APIC	Enabled / Disabled	Only available with dual Pentium processor module.    SMP = APIC enabled, ASMP = APIC disabled.
System Board Extended Memory	Not User Selectable	Value determined by system BIOS
System Base Memory Option	512 KB / 640 KB	Sets size of conventional system memory.
User Definable Hard Disk	Types 48 & 49 Types 2 & 3 / Types 48 & 49	Some operating systems do not recognize hard drive types above 29. This option allows types 2 and 3 to be user defined. System BIOS shadowing must be enabled to use types 2 or 3 for Novell applications.
Cache Control Option	Disabled  Cache Enabled in Write-though Mode Cache Enabled in Write-back Mode	Selects the internal i486/Pentium processor cache and any secondary cache memory or disables all cache memory resources.
Onboard Floppy Controller	Enable Onboard Floppy Controller  Disable Onboard Floppy Controller	Selects onboard 82077SL floppy controller interface.
Diskette A Diskette B	5.25"  360 KB  5.25"  1.2 MB  3.5"  720 KB     3.5"  1.44 MB 3.5" 2.88 MB Not Installed	Select size and density of the system floppy drives.
Onboard Hard Disk Controller	Enable / Disable	By disabling the onboard IDE interface an alternate controller can be installed in any available EISA slot.
Hard Drive 1 Options Hard Drive 2 Options	Enabled / Disabled (up to 49 different drive types)	Selects hard drive size and parameters from a list of 47 drive types. Drive types 48 & 49 are user definable for hard drives not listed in the BIOS drive table.
Parallel Port	Disabled Address 378H: Compatible/IRQ7 Address 278H: Bi-Directional/IRQ5 Address 378H: Bi-Directional/IRQ7 Address 278H: Compatible/IRQ5	Selects onboard printer port.  LPT1 printer port address is 378H. LPT2 printer port address is 278H. Bi-Directional is PS/2 compatible.  Compatible means PC/AT Centronics compatible.
Serial Port 1	Disabled Address 3F8H/IRQ4 Address 2F8H/IRQ3 Address 3E8H/IRQ10	Select serial port 1 as COM1 (3F8H), COM2 (2F8H) or COM3 (3E8H). If disabled, allows interrupt to be user definable.
Serial Port 2	Disabled Address 2F8H/IRQ3 Address 3E8H/IRQ10 Address 2E8H/IRQ11	Select serial port 2 as COM2 (2F8H), COM3 (3E8H) or COM4 (2E8H). If disabled, allows interrupt to be user definable.
Redirection for COM1 Redirection for COM2	Disabled 1200 baud 2400 baud 9600 baud	Allows the use of "scan-code" terminals to act as the system console through the serial ports. Disable when not in use to avoid affecting overall performance.
Video Type	Not Installed VGA/EGA MDA CGA - 80 columns CGA - 40 columns	Select the type of video used in the system. Includes the onboard VGA controller or any add-in video card.
Off board VGA/EGA Adapter Installed	No - Enable Onboard Video Controller via Jumper Yes - Disable Onboard Video Controller via Jumper	Move pins 1-2 on jumper E0290 to enable. Pins 2-3 disables onboard WD90C31 video controller.
Onboard Video Controller	Primary / Secondary	Selects onboard WD90C31 video controller as primary interface to the display monitor. The secondary selection allows add-in video card to become primary interface with onboard video interfacing a second display.
Onboard Video BIOS Mapping	To E0000H  To C0000H Onboard Video Mapping Disabled	Selects starting locations of video BIOS.
640 x 480 Mode Refresh	Non-Interlaced @ 60 Hz Non-Interlaced x2, x16 @ 72 Hz Non-Interlaced @ 75 Hz	Selects refresh rate when the onboard WD90C31 video controller is in 640 x 480 mode.
800 x 600 Mode Refresh	Non-Interlaced @ 56 Hz Non-Interlaced @ 60 Hz Non-Interlaced @ 72 Hz	Selects refresh rate when the onboard WD90C31 video controller is in 800 x 600 mode.
1024 x 768 Mode Refresh	Interlaced @ 44/88 Hz Non-Interlaced @ 60 Hz Non-Interlaced @ 70 Hz Non-Interlaced @ 72 Hz	Selects refresh rate when the onboard WD90C31 video controller is in 1024 x 768 mode.
Shadow  C0000-C7FFF C8000-CFFFF E0000-E7FFF	Enabled / Disabled Enabled / Disabled Enabled / Disabled	If enabled, these regions are shadowed independently to execute add-in adapter BIOS/memory code from 32-bit write protected memory.
Keyboard Control	Enabled / Disabled	Allows Network systems to be used without a keyboard.
Onboard Mouse Control	Enabled / Disabled	Selects the use of the onboard mouse port. Disable to free the interrupt (IRQ12) used by the PS/2-style mouse.
Speaker Control	Enabled / Disabled	Selects the onboard speaker.
CPU Speed Option	Fast / Slow	Sometimes referred to as Turbo and Deturbo. Selects CPU speed for speed-dependent application software.
NumLock Boot State	On at Boot / Off at Boot	Select state of NumLock key upon system boot.
I/O Recovery Time	Enhanced / Standard	Function to modify the EISA bus refresh cycle rate. The STANDARD option results in compatible EISA refresh cycles.  The ENHANCED option allows fast back-to-back I/O EISA write cycles to occur.  Adds approximately 2% to 5% system performance increase when in ENHANCED mode.
Posted I/O Writes	Fast / Standard / Disabled	Selects zero wait state posted I/O and memory write cycles to the EISA bus when in the FAST mode.  Approximately a 2% to 5% system performance increase when in FAST mode.
Concurrent Refresh	Enabled / Disabled	A fine tuning option for optimum system performance concerning the 15.6 μs memory refresh cycle.  When ENABLED, allows CPU to execute from cache during a refresh cycle.  Approximately a 1% to 7% performance increase when ENABLED.
LCD Operation	Enabled  Disabled	Option on Premium Deskside/MX chassis only. Default setting is enabled for Premium Deskside/MX server.  Default setting for Mainstream/LX server and Desktop platform is disabled.
Scan FLASH User Area	Enabled / Disabled	Scan programmable 8 KB  BIOS area (EA000-EBFFF) for source code prior to system boot. A BIOS signature and area checksum must be valid before the code is executed.
POST Memory Prompt	Enabled / Disabled	When disabled, omits "Press Spacebar to Abort Memory test" message on the video display.
BIOS Setup Control	Enabled - Prompt for F1 Setup Entry Enabled - Suppress Setup Prompt Setup Disabled	When disabled, prevents entry into FLASH-based BIOS setup at any time. By  suppressing the setup prompt the user is allowed to press [F1] to enter the BIOS setup, but the prompt is not displayed on the video screen.
Boot Device Control	Boot from Floppy or Hard Drive Boot from Hard Drive ONLY	Allows the system to disable the ability to boot from floppy drive A.  This feature has no effect if the floppy interface is controlled by a SCSI add-in card.
Reserved System Resources	Configuration File & Overlay 2.9.2	The version of the overlay file.  The version shown corresponds to ECU Release 2.9.2 being shipped at the time of this writing.
Table B-1. EISA Configuration Utility Options. (Default Values listed in Boldface)

Slot 9 - Embedded Adaptec AIC-7770 SCSI Controller (default settings in Boldface)
Embedded SCSI Controller BIOS	Disabled Enabled at C0000H Enabled at C8000H Enabled at E0000H Enabled at EC000H	Disabling the SCSI BIOS will automatically disable the onboard AIC-7770 SCSI controller. Press <F6> to view/edit interrupt trigger levels, IRQ numbers, or I/O addressing related to the onboard AIC-7770 SCSI controller. Default setting = Disabled.
Bus Release Time	60 BCLKS / 44 BCLKS / 28 BCLKS / 12 BCLKS /  2 BCLKS	The amount of time the AIC-7770 will continue to transfer data after being pre-empted in Bus Master Mode. Lowering the value frees up the EISA bus sooner to allow other bus masters in the Xpress system to gain access.
Data FIFO Threshold %	100% / 75% / 50% / 00%	Matches the AIC-7770 SCSI transfer rate and the system data transfer rate.
SCSI Channel A
Host Adapter SCSI ID	7 / 6 / 5 / 4 / 3 / 2 / 1 / 0	Configures SCSI ID setting for the Channel A port. Normally, SCSI ID 0 and 1 are reserved for hard drives, while SCSI ID 7 is for the SCSI Host Adapter.
SCSI Bus Parity Check	Enabled / Disabled	The AIC-7770 generates parity when writing across the SCSI bus. If an attached device does not support parity checking, this option would be disabled. However, most devices today support this SCSI bus specification.
SCSI Selection Time-out	256ms / 128ms / 64ms / 32ms	Used during SCSI selection phase. Lowering the value can increase SCSI bus scans, but some devices may not be able to handle the faster speed.
SCSI Bus Reset at Power-On	Enabled / Disabled	Normally enabled to match SCSI specifications.
SCSI Channel B
Host Adapter SCSI ID	7 / 6 / 5 / 4 / 3 / 2 / 1 / 0	SCSI ID for the AIC-7770 Channel B port. Normally, SCSI ID 0 and 1 are reserved for hard drives, while SCSI ID 7 is for the SCSI Host Adapter.
SCSI Bus Parity Check	Enabled / Disabled	The AIC-7770 generates parity when writing across the SCSI bus. If an attached device does not support parity checking, then this option would be disabled. However, most devices today support this SCSI bus specification.
SCSI Selection Time-out	256ms / 128ms / 64ms / 32ms	Used during SCSI selection phase. Lowering the value can increase SCSI bus scans, but some devices may not be able to handle the faster speed.
SCSI Bus Reset at Power-On	Enabled / Disabled	Normally enabled to match SCSI specifications.
Primary Channel Selection	A / B	Selects which channel is scanned first and used as the primary channel.
BIOS and Device Configuration	Press <ENTER> to configure	Supports Removable Disks as Fixed Disks / Extended Translation for Drives Larger than 1 GB / More than two SCSI drives / Device Table for Ch. A & B.
Utilities	Press <ENTER> to access	Includes disk format utility (will destroy all information on the selected drive).
Table 2. ECU Options for integrated AIC-7770 SCSI Controller.


System Interrupts

IRQ	Xpress System	Bus Pin	IRQ	Xpress System	Bus Pin
NMI	Parity Error	N/A	7	LPT1;  if enabled	115
0	Reserved, Interval Timer	N/A	8	Real Time Clock (RTC)	N/A
1	Reserved, Keyboard buffer full	N/A	9	User Definable	98
2	Reserved, Cascade interrupt from slave PIC	N/A	10	COM3;  if enabled	128
3	COM2; if enabled	119	11	COM4;  if enabled	129
4	COM1; if enabled	118	12	Onboard PS/2 Mouse Port; if enabled	130
5	LPT2;  if enabled	117	13	Reserved, Math coprocessor	N/A
6	82077SL Onboard Floppy Controller;  if enabled	116	14	IDE Hard Drive Controller;  if enabled	132
			15	User Definable	131
Table D-1. Xpress System Interrupts

Notes: 1. IRQ 9, 10, 11, and 15 can be set via the ECU for EISA add-in cards.

2.	IRQ 0, 1, 2, 8, and 13 cannot be used by an add-in card. In PC-XT compatible systems, IRQ 2 was available for use on the XT-Bus. In PC/AT compatible systems, IRQ 2 is not available for use on the EISA/ISA bus. Some older ISA expansion boards have an option to use IRQ 2. This option should not be selected when a board is installed in the Xpress system.


Baseboard Connectors

J0840 - Main Power Connector

J0850 - Aux. Power Connector

J0860 - Aux. Power Connector

J0700 - Serial Port Connector

J0600 - Parallel Port

J0800 - PS/2 Mouse Connector

J0801 - PS/2 Keyboard Connector

J0830 - Aux. SCSI Disk Connector (on 384W Power Supply)

J0601 - VGA Video Connector

J0410 - VESA 8514/A Video Pass-through Connector

J0881 - Deskside/MX Front Panel Connector


J0840 - Main Power Connector

Type:	Single Row Header Style, PC/AT standard Connector, 12 pin (Male)

Pinout:	1	PWRGOOD

2	+5v

3	+12v

4	-12v

5	GND

6	GND     Pins 2, 10, 11, and 12 are rated for 5 amps each

7	GND

8	GND

9	-5v

10	+5v

11	+5v

12	+5v


J0850 - Aux. Power Connector

Type:	Single Row (Male); Used with 215W, 230W and 384W Power Supplies

Pinout:	1	+5v

2	+5v

3	+5v

4	GND     Pins 1, 2,and 3 are rated for 5 amps each

5	GND

6	GND


J0860 - Aux. Power Connector

Type:  	Single Row Header (Male);  Used with 384W Deskside Power Supply only

Pinout:	1	+5v

2	+5v

3	+5v	Pins 1, 2, and 3 are rated for 5 amps each

4	GND

5	GND

6	GND


J0700 - Serial Port Connector

Type:	Stacked Dual 9-Pin D-sub (Male)

Pinout:	1	DCD

2	RxD

3	TxD

4	DTR

5	GND

6	DSR

7	RTS

8	CTS

9	RI


J0600 - Parallel Port

Type:	5-pin Centronics type (Female)

Pinout:	PC /AT standard


J0800 - PS/2 Mouse Connector

Type:	PS/2 (Female)

Pinout:	1	Data

2	N/C

3	GND

4	+5 DC (fused)

5	Clock

6	N/C


J0801 - PS/2 Keyboard Connector

Type:	PS/2 (Female)

Pinout:	1	Data

2	N/C

3	GND

4	+5 DC (fused)

5	Clock

6	N/C


J0830 - Aux. SCSI Disk Connector (on 384W Power Supply)

Type:	4-pin miniature PS/2 (Female)

Pinout:	1	DC Enable

2	N/C

3	N/C

4	DC Common


J0601 - VGA Video Connector

Type:	15-pin miniature D-sub Super VGA compatible (Female)

GND	N/C	Blue	Green	Red
GND	N/C	GND	GND	GND
N/C	Vert. Sync.	Horiz. Sync.	N/C	N/C


J0410 - VESA 8514/A Video Pass-through Connector

Type:	3M style, double row header, 26 pin (Male)

Data 0	Data 1	Data 2	Data 3	Data 4	Data 5	Data 6	Data 7	DOTC	BLANK  (key)	VBHS RFSH	VBVS RFSH	GND  (pin 26)
GND (pin 1)	GND	GND	Data ENBL	SYNC ENBL	DOTC ENBL	N/C	GND	GND	GND	GND	N/C	N/C (pin 25)


J0881 - Deskside/MX Front Panel Connector

Type:	3M style, double row header, 34 pin (Male)

SPKR DATA	ON/ OFF	FT_PNL RESET#	PWR LED	SCSI  LED 1	SCSI LED 2	KYBD LOCK	+5v	N/C (key)	REG SLCT	GND	DATA 0	GND	DATA 3	GND	DATA 6	GND
+5v (pin 2)	GND	GND	GND	SCSI RTRN 1	SCSI RTRN 2	GND	LCD PWR	+5v	+5v	RD/WT	ENBL	DATA 1	DATA 2	DATA 4	DATA 7	GND (pin 34)


I/O Control Ports

I/O Port	Bits	Description	I/O Port	Bits	Description
000-00F	0:7	82357 ISP --- Slave DMA #1	3BF-3DF	0:7	TI16C552 Registers
020-021	0:7	82357 ISP --- Master Interrupt #1	3E8-3EF	0:7	Serial Port #3  (COM3)
026	0:7	82356CS MECA/82351DS CLASIC Config. Index	3F0-3F5	0:7	82077SL Floppy Controller
027	0:7	82356CS MECA/82351DS CLASIC Config. Data	3F6	0:7	IDE Hard Drive Controller
040-043	0:7	82357 ISP --- Timer #1	3F7	0:6	IDE (Read)
048-04B	0:7	82357 ISP --- Timer #2	3F7	7	82077SL Floppy Controller (read)
060, 064	0:7	8742 Keyboard Controller	3F7	0:7	82077SL Floppy Controller (write)
061	0:7	82357 ISP --- NMI & Diagnostic port	3F8-3FF	0:7	Serial Port #1 (COM1)
070	0:6	Real Time Clock	400-40B	0:7	82357 ISP --- Extended DMA #1
070	7	82357 ISP --- Enable NMI	40C-40F	0:7	82357 ISP --- Extended Control/Test
071	0:7	Real Time Clock	461-464	0:7	82357 ISP --- Extended NMI
078	0:7	BIOS Loop Timer	464-465	0:7	82357 ISP --- Extended Bus Master
080-08F	0:7	82357 ISP --- DMA Page Registers	480-48F	0:7	82357 ISP --- Extended DMA Page Register
092	0:7	Xpress System Control Port	4C2-4CE	0:7	82357 ISP --- Extended DMA #2
0A0-0A1	0:7	82357 ISP --- Slave Interrupt #2	4D0	0:7	82357 ISP --- Extended Interrupt #1
0C0-0DE	0:7	82357 ISP --- Master DMA #2	4D1	0:7	82357 ISP --- Extended Interrupt #2
0F0	0:7	Reset Numeric Coprocessor	4D4	0:7	82357 ISP --- Extended DMA #2 Chaining
0F8-0FF	0:7	Numeric Coprocessor	4D6	0:7	82357 ISP --- Extended DMA #2 Write Mode
1F0-1F8	0:7	IDE Hard Drive Controller	C02-C04	0:7	System Baseboard Configuration Information
278-27B	0:7	Parallel Prt 2(LPT2); Parallel Prt 3(PS/2-Compat)	C80-C83	0:7	System Baseboard EISA ID Register
2E8-2EF	0:7	Serial Port #4  (COM4)	C84	0:7	System Baseboard Enable
2F8-2FF	0:7	Serial Port #2  (COM2)	C85-C87	0:7	Reserved for Intel
378-37F	0:7	Parallel Prt 1(LPT1);Parallel Prt 2 (PS/2-Compat)
3B0-3BB	0:7	WD90C31 Video Registers
3BC-3BE	0:7	Parallel Prt 3 (LPT3); Parallel Prt 1 (PS/2-Compat)
Table F-1. Xpress Baseboard I/O Ports


Supported Peripherals

The following devices are compatible with the Adaptec 7770 SCSI-2 drivers.

Hard Drives:	Tape Drives:

Conner CP30170E/CP30540/CP30100/CP5500/CP3200	Archive 2150S

Hewlett Packard HP2234/HPC2244/HPC2247	Wangtek 5150

Maxtor 7120SR/LXT213S/LXT437S/LXT535S/MXT7255	Sankyo CP525

Quantum Pro40S/Pro80S/Pro105S/LPS240S/Pro170S	Exabyte 8200

DEC DSP950/DSP3105/RZ73

Seagate SST3655N/ST11200N/ST11950N/ST12550N

Toshiba MK538FB

Hitachi DK516C

CD-ROM Drives:	DAT Drives:

Chinon CDX431	HP #35470 (4mm)

NEC CDR84/CDR74-1/CDR600	Sony SDT4000/SDT2000

Panasonic LS-MC501S/LK-MC501B/CR-563B	Archive Python 25501

Sony CDU-541	Exabyte EXB8500-85QMX0

Toshiba XM-3301B/XM-3301E1/XM-3401	         HP C1533

Creative Labs CT-531

Mitsumi FX-001


System TPS - Appendicies - Video Drivers and Utilities
Video Drivers and Utilities

Video Driver / Utility	Video Resolutions Supported
AutoCAD 386      Rel. 9/10 (Dual Screen) List	800 x 600 (x16, x256)	1024 x 768 (x16, x256)
Rel. 9/10 Non-Display List	640 x 480 (x256)	800 x 600 (x16, x256)	1024 x 768 (x16, x256)
Rel. 10 Display List	800 x 600 (x16,)	1024 x 768 (x16)
Rel. 11 Display List	800 x 600 (x16, x256)	1024 x 768 (x16, x256)
Rel. 11 Non-Display List	640 x 480 (x256)	800 x 600 (x256)	1024 x 768 (x256)
AutoShade 386 ver. 1.X	640 x 400 (x256)	640 x 480 (x256)	800 x 600 (x256)	1024 x 768 (x256)
AutoShade 386 ver. 2.0	640 x 480 (x256, x32K)	800 x 600 (x256, x32K)	1024 x 768 (x256)	1024 x 768 (x256)
CADvance ver. 3.0	640 x 480 (x256)	800 x 600 (x16, x256)	1024 x 768 (x4, x16)
CONF.EXE	AutoCAD Release 10 Display List Drivers Configuration Utility
Generic CADD Level 3	640 x 400 (x256)	640 x 480 (x256)	800 x 600 (x16 x256)	1024 x 768 (x16)
Lotus 1-2-3 rel. 2.0, 2.01, 2.2, 3.1	640 x 480 (x16, x256)	800 x 600 (x16)	1024 x 768 (x16)	132 column text
Lotus Symphony rel. 1.1, 1.2, 2.0	640 x 480 (x256)	800 x 600 (x16)	1024 x 768 (x16)	132 column text
Microsoft Windows 3.0	600 x 400 (x256)	640 x 480 (x256)	800 x 600 (x16, x256)	1024 x 768 (x2,x16,x256)
Microsoft Windows 3.1	600 x 400 (x256) 640 x 480 (x256, x32K)	800 x 600 (x16, x256, x32K) 1024 x 768 (x2, x16, x256)		1280 x 1024 (x16)
Microsoft Word ver. 5.0, 5.5	800 x 600 (x16)
MicroStation ver.  4.0.3	640 x 480 (x16, x256)	800 x 600 (x16, x256)	1024 x 768 (x16, x256)	1280 x 960 (x16) 1280 x 1024 (x16)
PCAD Level 2	800 x 600 (x16)	1024 x 768 (x16)
SETC.EXE	AutoCAD Release 9/10 Utility for Setting Color
VersaCAD Design                         ver. 5.4, 6.0, 7.0	640 x 400 (x256)	640 x 480 (x16, x256)	800 x 600 (x16, x256) 1024 x 768 (x16, x256)	1280 x 960 (x16) 1280 x 1024 (x16)
386 driver ver. 5.4, 6.0, 7.0	640 x 400 (x256)	640 x 480 (x16, x256)	800 x 600 (16, x256) 1024 x 768 (x16, x256)	1280 x 960 (x16) 1280 x 1024 (x16)
VGAMODE.EXE	Mode Switching Utility
WordPerfect ver. 5.0	800 x 600 (x16)	1024 x 768 (x16)
WordPerfect ver. 5.1	1024 x 768 (x16)
VESA.EXE	TSR for interfacing to 8514/A VESA standard
Table G-1. Video Drivers and Utilities

1. The AutoCAD Release 9/10 386 non-display list driver and the VersaCAD 386 driver should be executed for added video performance.

2. The WD90C31 video drivers are shipped with each Xpress platform system on three diskettes (DOS, Windows 3.0 and Windows 3.1)

3. The current version of the Western Digital video drivers are available on the iPAN Bulletin Board System.

4. SCO UNIX V3.2.R4/ODT 2.0/ODT 3.0, ISC UNIX V3.2, and IBM OS/2 are shipped by the vendor with WD90C31-compatible video drivers.


System TPS - Appendicies - Reliability Measurements (MTBF)
Reliability Measurements (MTBF)

Intel's OEM Products and Services Division (OPSD) provides Mean Time Between Failures (MTBF) values in a manner that's unique in the industry.  The Server Business Unit performs a number of reliability runs which build a high level of confidence in the calculated numbers. Due to the wide versatility of the Xpress server systems and the sheer number of possible server platform combinations, it just isn't economical to have 20 systems in five ovens for 90 days to get MTBF data on one Xpress server configuration. Instead, the reliability runs incorporate 10-15 Xpress systems / baseboard platforms from the factory floor using different CPU modules, memory modules, and ad-in accessory cards in a couple ovens. OPSD logs the accumulated hours for the different items in the ovens and updates the MTBF values every three months. By using this methodology, we are continuously collecting demonstrated MTBF numbers on the various CPU modules, memory modules, baseboards, and server system components.  Many customers use the predicted / demonstrated information to determine the level of spare parts and support models needed. Since the first Xpress platforms rolled off the factory floor three years ago, many of our customers have reported that their field-collected data easily exceeds the MTBF values shown below.

Product	Predicted MTBF	Demonstrated MTBF
Xpress Desktop w/ 16MB	21,993 Hrs. @ 35°C	NONE
Xpress Desktop w/ 8MB	26,462 Hrs. @ 35°C	NONE
Xpress Desktop w/ 4MB	29,455 Hrs. @ 35°C	115,259 Hrs. @ 40°C
Xpress/LX w/ 8MB	26,873 Hrs. @ 35°C	11,243 Hrs. @ 40°C
Xpress/LX w/ 16MB	26,508 Hrs. @ 35°C	NONE
Xpress/LX w/ SCSI & 8MB	26,471 Hrs. @ 35°C	11,243 Hrs. @ 40°C
Xpress/MX w/ SCSI & 16MB	23,667 Hrs. @ 35°C	NONE
Xpress/MX w/ SCSI & 8MB	23,844 Hrs. @ 35°C	13,878 Hrs. @ 40°C
RXBASE6E4P1 XpressRACK	135,000 Hrs. @ 40°C	25,000 Hrs. @ 45°C
RXBASE8E8P2 XpressRACK	122,000 Hrs. @ 40°C	25,000 Hrs. @ 45°C
Xpress 6-slot Baseboard	94,728 Hrs. @ 55°C	115,259 Hrs. @ 55°C
Xpress 8-slot Baseboard (w/SCSI)	62,176 Hrs. @ 55°C	20,914 Hrs. @ 55°C
Xpress 8-slot Baseboard (w/o SCSI)	65,719 Hrs. @ 55°C	41,029 Hrs. @ 55°C
100 MHz Pentium CPU Modules	176,066 Hrs. @ 55°C	ON-GOING @ 55°C
90 MHz Pentium CPU Modules	176,066 Hrs. @ 55°C	ON-GOING @ 55°C
66 MHz Dual Pentium CPU Module5	184,138 Hrs. @ 55°C	ON-GOING @ 55°C
X486DX2/66-B CPU Module	250,796 Hrs. @ 55°C	5,552 Hrs. @ 55°C
66 MHz Pentium CPU Module5	307,100 Hrs. @ 55°C	ON-GOING @ 55°C
60 MHz Pentium CPU Modules	386,309 Hrs. @ 55°C	14,072 Hrs. @ 55°C
X486DX/50 CPU Module	134,644 Hrs. @ 55°C	58,546 Hrs. @ 55°C
X486DX2/50 CPU Module	218,000 Hrs. @ 55°C	38,304 Hrs. @ 55°C
X486DX/33 CPU Module	218,012 Hrs. @ 55°C	27,547 Hrs. @ 55°C
X486SX/33 CPU Module	321,473 Hrs. @ 55°C	35,215 Hrs. @ 40°C
X486SX/25 CPU Module	218,050 Hrs. @ 55°C	65,930 Hrs. @ 55°C
BXMEM0 (w/8 MB total)	171,527 Hrs. @ 55°C	ON-GOING  @ 55°C
BXECCMEM0 (w/8 MB total)	255,441 Hrs. @ 55°C	ON-GOING  @ 55°C
XRAID960 add-in card	198,762 Hrs. @ 55°C	25,311 Hrs. @ 40°C
Server Management add-in card	97,307 Hrs. @ 55°C	ON-GOING @ 40°C
IDT 128 KB cache	25,825 Hrs. @ 35°C	13,413 Hrs. @ 55°C
Table E-1. Calculated Mean-Time-Between-Failures

1. 	The prediction methodology used Intel, vendor or Bellcore failure rates.

2.	Demonstrated MTBF values provided are limited by sample size and test time.

3.	Demonstrated values are at a confidence limit of 80%.

4.	Reliability statistics are shown for informal purposes only.

5.	The heat spreader "projected wearout" value is 100,000 hours @ 60°C by the manufacturer and is not included in either dual or single Pentium processor module MTBF predicted calculations.

FRU reliability:

215W  Power Supply:  MTBF is 50K hrs at 50 deg. C, 80% Confidence Level.

Floppy Drive:  MTBF is 115,713 hrs at 35 deg. C, 3.5% duty cycle

Fan:  MTTW is 50K hrs minimum at 25 deg. C and 12V nominal voltage, running in non-polluted air.  The Fan is a wear-out item and is not included in the system-level MTBF calculation (MTTW is Mean Time To Wearout; MTBF is Mean Time Between Failure)

Please note that this data is based on current specifications from Intel and the vendors of these parts.  This data may be different from the data used to calculate the system MTBF when it was done a few years ago.


System TPS - Appendicies - Environmental Specifications
Environmental Specifications

DESKTOP CHASSIS / BASEBOARD / MODULE

DESKSIDE/LX CHASSIS / BASEBOARD / MODULE

DESKSIDE/MX CHASSIS / BASEBOARD / MODULE


DESKTOP CHASSIS / BASEBOARD / MODULE

Dimensions	Desktop Chassis	6-Slot Baseboard	Two-Socket  CPU Module
Width	17.30" (43.94 cm)	10.45" (26.54 cm)	12.08" (30.68 cm)
Depth	17.08" (43.38 cm)	12.70" (32.26 cm)	4.27"  (10.85 cm)
Total height       Rubber feet Without feet	6.22" (15.80 cm)    0.25" (0.64 cm)    5.97" (15.80 cm)	0.550" (1.40 cm) N/A N/A	1.69"  (4.23 cm) N/A N/A
Weight (approx.)	30 lb. (13.61 kg.)	5 lb. (1.61 kg.)	2 lb. (0.91 kg.)
Parameter	6-slot Baseboard	Xpress/DT Desktop System
Ambient Temperature	Operating:              0°C to +55°C Non-Operating:   -40°C to +70°C	Operating:           +10°C to +35°C Non-Operating:   -40°C to +65°C
Humidity	Operating:           85% RH at +55°C   Non-Operating:   95% RH at +55°C	Operating:          20% to 80% at +35°C Non-Operating:  20% to 92% at +65°C
Altitude	Operating:           10,000 ft. (3048 m) Non-Operating:  50,000 ft. (15,240 m)	Operating:          10,000 ft. (3048 m) Non-Operating:  50,000 ft. (15,240 m)
Static Discharge (ESD)	0 - 5KV (no errors) 5KV - 12KV (no hard errors) 12KV - 25KV (no damage)	0 - 5KV (no errors) 5KV - 12KV (no hard errors) 12KV - 25KV (no damage)
Noise (1 meter @ 25°C)	N/A	40 dB
TEAPO 215 WATT POWER SUPPLY

The fan supplies 120 lfm (28 cfm) of moving air.

Voltage	Minimum	Maximum	Peak Surge	Wattage
+5 V	3.0 A	32.00 A	32.00 A	160 W
+12 V	0.5 A	4.00 A	7.00 A	48 W
-12 V	0.0 A	0.50 A	0.50 A	6 W
-5 V	0.0 A	0.10 A	0.20 A	1 W
The amperage values below are actual measured levels with the Xpress system executing an MS-DOS application and show the maximum current (worst case) of every component. Adding SIMMs to the memory module does not severely increase the amperage values because the interleaving circuitry has only one memory bank active at a time.

Hardware Description	+5 V	+12 V	-5 V	-12 V
6-slot Baseboard	3.2 amps	0.1 amps	0.0	0.1 amps
50 MHz 486DX CPU Module	4.2 amps	0.0	0.0	0.0
AHA 1740/B	2.2 amps	0.0	0.0	0.0
Intel EtherExpress16	0.4 amps	0.2 amps	0.0	0.0
Intel Connection CoProcessor	1.4 amps	0.0	0.0	0.0
ProAudio Spectrum16	1.1 amps	0.1 amps	0.0	0.0
Two EISA slots available	2.2 amps	0.1 amps	0.0	0.0
(2)  WD2340 IDE Hard Drives	peak .65 amps ea.	peak .8 amps ea.	0.0	0.0
Teac 3.5-inch Floppy	0.3 amps	0.0	0.0	0.0
Archive 125 MB tape drive	0.5 amps	0.8 amps	0.0	0.0
Internal Fan	0.0	peak 1.0 amps	0.0	0.0


DESKSIDE/LX CHASSIS / BASEBOARD / MODULE

Dimensions	Deskside/LX Chassis	8-Slot Baseboard	486DX/50 CPU Module
Width anti-tip feet	8.48" (21.54 cm) 9.48"  (24.07 cm)	12.45" (31.62 cm) N/A	8.25" (20.95 cm) N/A
Depth	22.49" (57.12 cm)	12.70" (32.26 cm)	4.27" (10.85 cm)
Total Height anti-tip feet	20.40" (51.81 cm) 0.850" (2.16 cm)	0.550" (1.40 cm) N/A	1.69" (4.23 cm) N/A
Weight (approx.)	42 lb. (19.05 kg.)	5 lb. (2.27 kg.)	2 lb. (0.91 kg.)
Parameter	8-slot Baseboard	Xpress/LX System
Ambient Temperature	Operating:             0°C to +55°C Non-Operating:  -40°C to +70°C	Operating:         +10°C to +35°C Non-Operating:   -40°C to +65°C
Humidity	Operating:            85% RH at +55°C Non-Operating:   95% RH at +55°C	Operating:          20% to 85% at +40°C Non-Operating:  20% to 95% at +55°C
Altitude	Operating:          10,000 ft. (3048 m) Non-Operating:  50,000 ft. (15,240 m)	Operating:          10,000 ft. (3048 m) Non-Operating:  50,000 ft. (15,240 m)
Static Discharge (ESD)	0 - 5KV (no errors) 5KV - 12KV (no hard errors) 12KV - 25KV (no damage)	0 - 5KV (no errors) 5KV - 12KV (no hard errors) 12KV - 25KV (no damage)
Noise (1 meter @ 25°C)	N/A	45 dB
ASTEC 230 WATT POWER SUPPLY RATING

The fan supplies 160 lfm (30 cfm) of moving air.

Voltage	Minimum	Maximum	Peak Surge	Wattage
+5 V	11.0 A	30.0 A	30.0 A	150 W
+12 V	0.5 A	6.0 A	8.0 A	72 W
-12 V	0.0 A	0.5 A	0.5 A	6 W
-5 V	0.0 A	0.5 A	0.5 A	2.5 W
Amperage values below are measured levels with the system executing an MS-DOS application, and they show the maximum current of every component. Adding SIMMs to the memory module does not severely increase the values because the interleaving circuitry has only one memory bank active at a time.

Hardware Description	+5 V	+12 V	-5 V	-12 V
8-slot Baseboard (w/8MB)	3.2 amps	0.1 amps	0.0	0.1 amps
66 MHz IntelDX2 CPU Module	2.5 amps	0.0	0.0	0.0
BXMEM0 (w/32MB)	1.2 amps	0.0	0.0	0.0
DPT 2012/90B (w/4MB cache)	4.5 amps	0.1 amps	0.0	0.6 amps
Intel EtherExpress32	0.5 amps	0.2 amps	0.0	0.0
Intel Connection CoProcessor	1.4 amps	0.0	0.0	0.0
Five additional EISA cards	2.2 amps	0.1 amps	0.0	0.1 amps
(6) Maxtor LXT-535S Hard Drives	peak 0.75 amps / each	peak 0.53 amps/each	0.0	0.0
Teac 3.5-inch Floppy	0.3 amps	0.0	0.0	0.0
Teac 5.25-inch Floppy	0.6 amps	0.0	0.0	0.0
Internal Fan	0.0	peak 1.0 amps	0.0	0.0


DESKSIDE/MX CHASSIS / BASEBOARD / MODULE

Dimensions	Deskside Chassis	8-Slot Baseboard	Pentium CPU Module
Width	8.48" (21.54 cm)	12.45" (31.62 cm)	7.38" (18.75 cm)
Depth	23.15" (58.80 cm)	12.70" (32.26 cm)	4.85" (12.32 cm)
Total Height plastic feet     without feet	24.40" (61.98 cm)  0.850" (2.16 cm)   23.55" (59.82 cm)	0.550" (1.40 cm) N/A N/A	1.58" (4.01 cm) N/A N/A
Weight (approx.)	54 lb. (24.41 kg.)	5 lb. (2.27 kg.)	3.2 lb. (1.45 kg.)
Parameter	8-slot Baseboard	Xpress/MX System
Ambient  Temperature	Operating:             0°C to +55°C Non-Operating:  -40 C to +70 C	Operating:         +10°C to +35°C Non-Operating:   -40°C to +65°C
Humidity	Operating:            85% RH at +55°C  Non-Operating:   95% RH at +55°C	Operating:          20% to 85% at +40°C Non-Operating:  20% to 95% at +55°C
Altitude	Operating:          10,000 ft. (3048 m) Non-Operating:  50,000 ft. (15,240 m)	Operating:          10,000 ft. (3048 m) Non-Operating:  50,000 ft. (15,240 m)
Static Discharge (ESD)	0 - 5KV (no errors); 5KV - 12KV (no hard errors); 12KV - 25KV (no damage)	0 - 5KV (no errors) ; 5KV - 12KV (no hard errors); 12KV - 25KV (no damage)
Noise (1 meter @ 25°C)	N/A	45 dB
ASTEC 384 WATT POWER SUPPLY RATING

Voltage	Minimum	Maximum	Peak Surge	Wattage
+5 V	11.0 A	45.0 A	45.0 A	225 W
+12 V	0.5 A	12.0 A	16.0 A	144 W
-12 V	0.0 A	1.0 A	1.0 A	12 W
-5 V	0.0 A	0.5 A	0.5 A	2.5 W
Amperage values below are measured levels with the system executing an MS-DOS application and show the maximum current of every component. Adding SIMMs to the memory module does not severely increase the values because the interleaving circuitry has only one memory bank active at a time.

Hardware Description	+5 V	+12 V	-5 V	-12 V
8-slot Baseboard (w/8 MB)	3.2 amps	0.1 amps	0.0	0.1 amps
Dual Pentium Processor Module	11.9 amps	0.0	0.0	0.0
BXMEM0 (w/ 256 MB)	1.6 amps	0.0	0.0	0.0
Intel XRAID960 card (w/ 4 MB)	3.2 amps	0.1 amps	0.0	0.0
TPE 32-bit Hub adapter	1.2 amps	0.2 amps	0.0	0.0
TPE Expansion Hub	1.2 amps	0.2 amps	0.0	0.0
Intel EtherExpress32	0.5 amps	0.2 amps	0.0	0.0
TPE Hub32 adapter	0.4 amps	0.0	0.0	0.0
Intel 2400EX Modem card	0.3 amps	0.1 amps	0.1 amps	0.0
Two EISA slots available	2.2 amps	0.1 amps	0.0	0.1 amps
(8) DEC DSP3105 Hard Drives	peak 0.9 amps ea.	peak 2.6 amps/each	0.0	0.0
Teac 3.5-inch Floppy	0.3 amps	0.0	0.0	0.0
Archive 125 MB tape drive	0.5 amps	0.8 amps	0.0	0.0
Toshiba 3301 CD-ROM drive	0.49 amps	0.22 amps	0.0	0.0
Internal Fan	0.0	peak 1.0 amps	0.0	0.0
ASTEC 300 WATT POWER SUPPLY RATING

Voltage	Minimum	Maximum	Peak Surge	Wattage
+5 V	7.0 A	35.0 A	35.0 A	175 W
+12 V	0.5 A	10.0 A	14.0 A	120 W
-12 V	0.0 A	0.5 A	1.0 A	6.0 W
-5 V	0.0 A	0.5 A	0.5 A	2.5 W
ASTEC 396 WATT POWER SUPPLY RATING

The total wattage allowed to peripherals is 50 watts (for +5 volts and +12 volts). The total wattage allowed to the EISA slots is 56.5 watts.

Voltage	Minimum	Maximum	Peak Surge	Wattage
+5 V	11.0 A	45.0 A	45.0 A	225 W
+12 V	0.0 A	13.0 A	19.0 A	156 W
-12 V	0.0 A	1.0 A	1.0 A	12 W
-5 V	0.0 A	0.5 A	0.5 A	2.5 W


Regulatory Standards

The Xpress Desktop, Deskside/LX, Deskside/MX, and CPU Module products meet or exceed these regulatory requirements:

Ergonomics	Germany	ZH1/618
Safety	U.S.	UL 1950, 1st edition
	Canada	CSA C22.2 #950-M89; Xpress/LX and Xpress/MX
	Canada	CSA C22.2 #220; Xpress desktop
	Europe	TUV to EN 60950, IEC 950
	Nordic	NEMKO EN60 950, EMKO-TUE(74-SEC) 203 T/90
	Australia	AS3260-1988
Emissions	U.S.	FCC Class B CFR #47 Parts 2 and 15, Certified Class B
	Canada	DOC CRC c.1374 Class B
	Germany	VDE 0871/6.78 Class B
	Germany	Vfg 1046/1984
	Europe	CISPR 22/85 Class B
	Japan	VCCI Class 2 ITE


System Product Codes

XBASE6E4F-B

Desktop chassis (6-slot baseboard with WD90C31, 4MB), 3.5-inch floppy drive, no CPU module, no hard drive, 215 watt power supply, video drivers & utilities/ECU diskettes, and product guide.

XBASE6E16F-B

Desktop chassis (6-slot baseboard with WD90C31, 16MB, and two open SIMM sockets), 3.5-inch floppy drive, ECC-ready with MECA3 component, no CPU module, no hard drive, 215 watt power supply, video drivers & utilities/ECU diskettes, and product guide.

XLXBASE8TE8F

Deskside/LX chassis (8-slot baseboard with WD90C31, 8MB), 3.5-inch floppy drive, no CPU module, no hard drive, no SCSI controller, 230 watt power supply, video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XLX8E8F220V

Deskside/LX chassis (8-slot baseboard with WD90C31, 8MB), 3.5-inch floppy drive, no CPU module, no hard drive, no SCSI controller, 230 watt power supply selected for European operation, video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XLXBASE8TE8FS

Deskside/LX chassis (8-slot baseboard with WD90C31, 8MB, and AIC-7770 SCSI controller), 3.5-inch floppy drive, no CPU module, no hard drive, 230 watt power supply, video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XLXBASE8TE16F

Deskside/LX chassis (8-slot baseboard with WD90C31, 16MB, and two open SIMM sockets), 3.5-inch floppy drive, ECC-ready with MECA3 component, no CPU module, no hard drive, no SCSI controller, 230 watt power supply, video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XLX8E16F220V

Deskside/LX chassis (8-slot baseboard with WD90C31, 16MB, and two open SIMM sockets), 3.5-inch floppy drive, ECC-ready with MECA3 component, no CPU module, no hard drive, no SCSI controller, 230 watt power supply selected for European operation, video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XLXBASE8TE16FS

Deskside/LX chassis (8-slot baseboard with WD90C31, AIC-7770 SCSI controller, 16MB, and two open SIMM sockets), 3.5-inch floppy drive, ECC-ready with MECA3 component, no CPU module, no hard drive, no SCSI controller, 230 watt power supply, video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XLX8E16FS220V

Deskside/LX chassis (8-slot baseboard with WD90C31, AIC-7770 SCSI controller, 16MB, and two open SIMM sockets), 3.5-inch floppy drive, ECC-ready with MECA3 component, no CPU module, no hard drive, no SCSI controller, 230 watt power supply selected for European operation, video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XBASE8TE8F-C

Deskside/MX chassis (8-slot baseboard with WD90C31, AIC-7770 SCSI controller, 8MB), 3.5-inch floppy drive, ECC-ready with MECA3 component, no CPU module, no hard drive, 384 watt power supply, Video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

XBASE8TE16F-C

Deskside/MX chassis (8-slot baseboard with WD90C31, AIC-7770 SCSI controller, 16MB, and two open SIMM sockets), 3.5-inch floppy drive, ECC-ready with MECA3 component, no CPU module, no hard drive, 384 watt power supply, Video drivers & utilities/ECU/Diagnostic diskettes, and product guide.

RXBASE6E4P1

XpressRACK system, 4 MB, 300 watt power supply, no CPU module, no floppy drive. An order code exists for each Intel486 DX, SX, and IntelDX2 processor module with this 6-slot XpressRACK system.

RXBASE8E8P2

XpressRACK system, 8 MB, 396 watt power supply, no CPU module, no floppy drive. An order code exists for each Intel486 DX, SX, and IntelDX2 processor module with this 8-slot XpressRACK system.

SPCXPRM6BTO

XpressRACK system, 6-slot baseboard. The customer selects memory size, power supply, CPU module, floppy drive(s), hard drive(s), air filters and other accessories to be integrated/tested by Intel.

SPCXPRM8BTO

XpressRACK system, 8-slot baseboard. The customer selects memory size, power supply, CPU module, floppy drive(s), hard drive(s), air filters and other accessories to be integrated/tested by Intel.

BXBASE6E0-B

Six-slot baseboard, 0 MB installed. No CPU or memory module.

BLXBASE8E0-C

Eight-slot baseboard, 0 MB installed. ECC-ready with MECA3 component, no CPU or memory module, no AIC-7770 SCSI controller.

BXBASE8E0-C

Eight-slot baseboard, 0 MB installed. Integrated AIC-7770 SCSI controller, ECC-ready with MECA3 component. No CPU or memory module.