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Classic R-Series Informational Help File - Main Menu
Classic R-Series Informational Help File - Version 1.50 (November 4, 1994)

Main Menu

Classic R-Series Technical Information is organized under the following subjects:

Intel Product Update Bulletin (iPUB)	General Product Information
Board Product History (Classic R)	CMOS Setup Usage
Board Product History (Classic R+)	Approved SIMM List
System Product History	Approved SRAM/VRAM List
BIOS History	Known Errata
Compatibility List	Certifications Menu
Orderable Spare Parts List
Software Driver History (Classic R)
Software Driver History (Classic R+)
Technical Product Summary Information

Introduction to the Classic R-Series

System Features Menu

Additional Information


Classic R-Series Board Product History
Board Product History

July, 94

PBA Numbers: 612209, 612477, 612478, 612479

All Classic R-Series products ship with 4 MB of system DRAM (1 M x 32 SIMM, 70 ns) and 512 KB of video DRAM.  The four printed-circuit board assembly (PBA) numbers reflect the four processor product choices available.  Although all four of the PBAs share the same system printed-circuit board (PB), each PBA contains a different processor as shown in the following table.

PBA Number	Features
612209	i486SX-25, 4 MB System Board
612477	i486SX-33, 4 MB System Board
612478	i486DX-33, 4 MB System Board
612479	i486DX2-66, 4 MB System Board

See the Classic R-Series General Information Section for information regarding BIOS, system memory, secondary cache memory, and processor upgrades.

Version -001	effective April, 1993

The first Classic R-Series Microcomputer version released into manufacturing and fully supported by Intel.

Additional Information:

- PB number 612194-002 (Rev B)

- PB schematic number 612202

- PBA drawing number 612207

- Phoenix ROM BIOS PLUS Version 1.00.02.AC0

Version -002	effective May, 1993

The following changes were incorporated in the -002 version of the motherboard (PBA):

The PB number changed from 612194-002 to 612194-003 (Rev C) to bury a blue wire and delete a cut for manufacturability.

PROPAL 613598-001 was added as the preferred part and 612246-001 was changed to alternate at location U31 to reduce cost.

RP30 and RP31 changed from 10K ohms to 2.2K ohms and C1, C2, C3, and C4 changed from 470pF to 47pF to decrease the rise time on the mouse and keyboard clock and data lines.  These changes fix the PS/2 mouse problems that were caused by the keyboard controller in the 82C113A device returning an invalid status during the PS/2 mouse interface test.

Added two new 47pF capacitors (C197 and C198) on ISA signals BALE and AEN to fix the DEPCA DC100A lock-up problems.

Changed the Low-Insertion Force (LIF) CPU socket on the DX-33 and DX2-66 products (PBA #'s 612478 and 612479) to a Zero-Insertion Force (ZIF) socket to make these boards OverDrive ready.  The SX-25 and SX-33 products (PBA #'s 612209 and 612477) continue to ship with the LIF sockets.

Version -004	effective August, 1993

The PB number changed from 612194-003 to 612194-004 (Rev D) in the -004 version of the motherboard (PBA) and incorporated the following changes:

Adds a 47pF capacitor to the ISA MEMR# signal to correct a noise problem with the VLSI 82C480 chip set.  This problem was found to cause parity errors when the combination of two NE2000A cards and an Adaptec 1542B SCSI card were used in a Novell client environment.

Modifies PB trace layout to implement fixes for two VLSI 82C480 problems involving DMA operations.  One issue caused incorrect data reads under certain conditions when using DMA channels 1, 3, or 6.  The other problem caused incompatibility with certain add-in cards that use ISA-mapped memory and latch the LA address lines on the falling edge of memory writes during DMA cycles.

Deletes the unused watchdog (BIOS-independent) timer circuit from the PB trace layout.

All system boards will start shipping with non-parity (x32) SIMMs instead of the parity (x36) SIMMs currently being used. Non-parity SIMMs enjoy wider availability, lower power consumption, and greater reliability than parity SIMMs. Support for non-parity SIMMs is provided by BIOS versions 1.00.04.AC0 and above, which recognizes all parity, all non-parity, or mixed parity and non-parity SIMM configurations.

Version -005	effective August, 1993

The -005 version of the motherboard (PBA) incorporates the following changes:

The new CL-GD5424 C-step of the Cirrus Logic VGA controller will be incorporated onto all system boards. This stepping fixes the erratum in current CL-GD5424 steppings which prevents the VESA feature connector from working properly. Note that the C-step reserves interrupt IRQ9 and that adapter cards using IRQ9 need to be configured for a different interrupt. Although IRQ9 was also reserved in earlier CL-GD5424 steppings, a Cirrus Logic erratum existed which allowed adapter cards to use this interrupt.

The standard i486 CPUs will be replaced with the newer SL Enhanced i486 CPUs which incorporate power management features and provide an additional 1-2 watts of power savings when the system is in power-down mode.

Version -006	effective August, 1993

The -006 version of the motherboard (PBA) incorporates the following changes:

Removes the RC network from the reset circuit of the Cirrus VGA controller - capacitor C60 is removed and resistor block R7 changes from a 10K ohm to a 0 ohm value.  The RC network is unnecessary and caused periodic power-up failures on the Rev D fab that was introduced with PBA revision -004.

Version -008	effective December 1993

The -008 version of the motherboard (PBA) incorporates the following changes:

The 10K ohm pull-up resistors (R10, R15, R16, R18, R19, & R24) on the SD bus were found to allow the outputs of the VLSI 82C480 to oscillate and produce high-frequency noise on the D bus.  The noise on the D bus resulted in intermittent parity errors during MEMR accesses by bus masters such as the newer Olicom and Proteon 1392 Token Ring cards. Reducing the value of the SD pull-up resistors from 10K ohms to 4.7K ohms eliminates the noise on the D bus as well as the parity errors. In addition, the pull-up resistors on the DRQ0, DRQ5-7, MDEN*, IRQSH/LD, MEMR*, and MEMW* were changed to 4.7K ohm values.

Version -100	effective May 1994

The -100 version of the motherboard (PBA) incorporates the following changes:

Revision F Motherboard - 100

The motherboard fab changed from Rev D to Rev F (Rev E was never released) and incorporated the following changes (note that the revision level rolled to -100 rather than -009 to simplify internal product tracking):

Adds a 16R8 EPLD device to "stretch" four of the interrupts (IRQ5, 9, 10, & 11) to work around the existing VLSI 82C480 erratum that renders certain adapter cards incompatible with the Classic R-Series. Cards that are known to suffer from this interrupt problem include the Intel TokenExpress ISA/16s, Olicom 16/4 Token Ring, and IBM Token Ring Network 16/4 Adapter II Token Ring adapters.

Deletes the IRQ9 trace from the VGA controller (U11-52) so that IRQ2/IRQ9 is available for adapter cards and adds test points for manufacturing use.

Converts four no-connects on CPU PGA socket (outer rows) to Vss ties.

Adds 47pF capacitor to the IOR# & IOW# signals to filter ringing that caused a problem on a customer's proprietary communication adapter.

Attaches PWRGD signal to U9-58 (SMC651 I/O chip) and removes R5. This fix addresses a 1.1% fallout rate in manufacturing test due to intermittent "Floppy Drive 0 Failure" errors. The error was seen during POST after power up and was traced to the SMC651 I/O chip not powering up in a known state. BIOS 1.00.07.AC0 implemented a work around by forcing the I/O chip into a known state at power up.

Adds a 100pF capacitor to the IOCHRDY signal to fix a noise problem seen with EtherExpress 16C Flash adapters (A- and B-step versions, only) which resulted in occasional network transmission errors.

Adds a 10K ohm pull-up resistor to the BUSY signal of the parallel port. When data is sent to the printer port and the printer is powered off or the cable is unattached, the BIOS will return an error message as expected.

Version -102	effective May, 1994

The -102 version of the motherboard (PBA) incorporates the following changes:

Added a 180 nH inductor to the IOW# and IOR# signals to correct a noise issue discovered in some boards of the first production run of the Fab F motherboard due to incorrect layer thickness. This change requires traces to be rerouted using blue wires for the IOR# signal and R106 replaced with the inductor for IOW#.

Version -103	effective July, 1994

The -103 version of the motherboard (PBA) incorporates the following changes

Changes the Fab F PB drawing to call out 65 ohms +/-15% specification for inner-layer impedance.  This impedance specification gives Intel greater control over board fab vendors by replacing the previous requirement for layer thickness with the more important and measurable impedance requirement.

Important Update Regarding Fab F Boards

On the initial high volume production build of Fab F (-100 boards), the factory experienced high fallout.After two weeks of analysis, root cause was determined to be fabs that were not built to specification.Intel verified a rework which fixed the marginality on the signal causing the problem and did extensive testing of this solution including four corners and signal analysis.  Boards built with these reworked fabs are designated as  -102. Our vendors now have corrected the layer thickness problem, and Intel is now able to produce the original Fab F -100 boards. Intel has only shipped -100 boards built with correct layer thickness. The ability to correctly produce Fab F boards allowed Intel to delay indefinitely the implementation of Fab G.

During the investigation of this problem, Intel discovered that our method of fab specification could be improved.Intel decided that specifying impedance would be preferable to specifying layer thickness.Boards built using the impedance specification will be designated -103.


Classic R-Series Plus Board Product History
Board Product History (Classic R-Plus)

July, 1994

AA Numbers: 615529, 615531, 615533, 615535

Classic R-Series Plus products ship with either 4 MB (1 M x 32 SIMM, 70 ns) or 8 MB (2 M x 32 SIMM, 70 ns) of system DRAM and 1 MB of video DRAM.  The four printed-circuit board assembly (AA) numbers reflect the four processor product choices available.  Although all four of the AAs share the same system printed-circuit board (PB), each AA contains a different processor as shown in the following table.

AA Number	Features
615529	i486SX-25, 4 MB System Board
615531	i486SX-33, 4 MB System Board
615533	i486DX-33, 8 MB System Board
615535	i486DX2-66, 8 MB System Board

See the Classic R-Series General Information Section for information regarding BIOS, system memory, secondary cache memory, and processor upgrades.

Version -001	effective August, 1993

The first Classic R-Series Plus Microcomputer version released into manufacturing and fully supported by Intel.

Additional Information:

- PB number 612194-004 (Rev D)

- PB schematic number 616562

- Phoenix ROM BIOS PLUS Version 1.00.05.AC0

Version -003	effective August, 1993

The following changes were incorporated in the -002 version of the motherboard (AA):

Removes the RC network from the reset circuit of the Cirrus VGA controller - capacitor C60 is removed and resistor block R7 changes from a 10K ohm to a 0 ohm value.  The RC network is unnecessary and caused periodic power-up failures on the Rev D fab.

Version -004	effective November, 1993

The -004 version of the motherboard (AA) incorporates the following changes:

The standard i486 CPUs were replaced with the newer SL Enhanced i486 CPUs which incorporate power management features and provide an additional 1-2 watts of power savings when the system is in power-down mode. Initially, only the i486 SX-25, SX-33, and DX-33 products incorporated SL Enhanced CPUs and the DX2-66 SL Enhanced CPU were made available in early Q1 of 1994.

Version -005	effective February, 1994

The -005 version of the motherboard (AA) incorporates the following changes:

The 10K ohm pull-up resistors (R10, R15, R16, R18, R19, & R24) on the SD bus were found to allow the outputs of the VLSI 82C480 to oscillate and produce high-frequency noise on the D bus.  The noise on the D bus resulted in intermittent parity errors during MEMR accesses by bus masters such as the newer Olicom and Proteon 1392 Token Ring cards. Reducing the value of the SD pull-up resistors from 10K ohms to 4.7K ohms eliminates the noise on the D bus as well as the parity errors. In addition, the pull-up resistors on the DRQ0, DRQ5-7, MDEN*, IRQSH/LD, MEMR*, and MEMW* were changed to 4.7K ohm values.

Version -100	effective April, 1994

The motherboard fab changes from rev. D to rev. F (rev. E was never released) and incorporates the following changes (note that the AA revision level rolls to -100 rather than -006 to simplify internal product tracking):

Adds a 16R8 EPLD device to "stretch" four of the interrupts (IRQ5, 9, 10, & 11) to workaround the existing VLSI 82C480 erratum that renders certain adapter cards incompatible with the Classic R-Series. Cards that are known to suffer from this interrupt problem include the Intel TokenExpress ISA/16s, Olicom 16/4 Token Ring, and IBM Token Ring Network 16/4 Adapter II Token Ring adapters.

Deletes the IRQ9 trace from the VGA controller (U11-52) so that IRQ2/IRQ9 is available for adapter cards and adds test points for manufacturing use.

Converts four no-connects on CPU PGA socket to Vss ties.

Adds 47pF capacitor to the IOR# & IOW# signals to filter ringing that caused a problem on a customer's proprietary communication adapter.

Adds a 10K ohm pullup resistor to the BUSY line of the parallel port so that the BIOS properly returns an error when a print request is made and the printer is either powered down or unattached.

Attaches PWRGD signal to U9-58 (SMC 651 I/O chip) and removes R5. This fix addresses a 1.1% fallout rate in manufacturing test due to intermittent "Floppy Drive 0 Failure" errors. The error was seen during POST after power up and was traced to the SMC 651 I/O chip not powering up in a known state. BIOS 1.00.07.AC0 implemented a workaround by forcing the I/O chip into a known state at power up.

Adds a 100pF capacitor to the IOCHRDY signal to fix a noise problem seen with Intel EtherExpress 16 C Flash adapters (A- and B-step versions, only) which resulted in occasional network transmission errors.

Adds a 10K ohm pullup resistor to the BUSY signal of the parallel port.  When data is sent to the printer port and the printer is powered off or the cable is unattached, the BIOS will return an error message as expected.

Version -102	effective May, 1994

The -102 version of the motherboard (PBA) incorporates the following changes:

Added a 180 nH inductor to the IOW# and IOR# signals to correct a noise issue discovered in some boards of the first production run of the Fab F motherboard due to incorrect layer thickness. This change requires traces to be rerouted using blue wires for the IOR# signal and R106 replaced with the inductor for IOW#.

Version -103	effective July, 1994

The -103 version of the motherboard (PBA) incorporates the following changes

Changes the Fab F PB drawing to call out 65 ohms +/-15% specification for inner-layer impedance.  This impedance specification gives Intel greater control over board fab vendors by replacing the previous requirement for layer thickness with the more important and measurable impedance requirement.

Important Update Regarding Fab F Boards

On the initial high volume production build of Fab F (-100 boards), the factory experienced high fallout.After two weeks of analysis, root cause was determined to be fabs that were not built to specification.Intel verified a rework which fixed the marginality on the signal causing the problem and did extensive testing of this solution including four corners and signal analysis.  Boards built with these reworked fabs are designated as  -102. Our vendors now have corrected the layer thickness problem, and Intel is now able to produce the original Fab F -100 boards. Intel has only shipped -100 boards built with correct layer thickness. The ability to correctly produce Fab F boards allowed Intel to delay indefinitely the implementation of Fab G.

During the investigation of this problem, Intel discovered that our method of fab specification could be improved.Intel decided that specifying impedance would be preferable to specifying layer thickness.Boards built using the impedance specification will be designated -103.


Classic R-Series System Product History
System Product History

July, 1994

The Classic R-Series system was first released into manufacturing and fully supported by Intel in April, 1993.  All systems ship with 4 MB of system DRAM, 512 KB of video DRAM, one 3.5" floppy drive (TEAC model FD-235HF-4291), a 145 Watt switching power supply (Astec model SA145-3430), one 3.5" floppy cable, one IDE hard disk cable, and a country kit.  Each country kit contains a Product Guide, a Cirrus Logic GD5424 Display Drivers and Power Manager diskette, and an AC power cord.

The Classic R-Series Plus system was first released into manufacturing and fully supported by Intel in August, 1993.  All systems ship with either 4 MB or 8MB of system DRAM, 1 MB of video DRAM, one 3.5" floppy drive (TEAC model FD-235HF-4291), a 145 Watt switching power supply (Astec model SA145-3430), one 3.5" floppy cable, one IDE hard disk cable, and a country kit.  Each country kit contains a Product Guide, a Cirrus Logic GD5424 Display Drivers and Power Manager diskette, and an AC power cord.

Product Codes:

Classic R Systems	Features
R486SX254F	i486SX-25 CPU, 4 MB, 3-½" floppy drive
R486SX334F	i486SX-33 CPU, 4 MB, 3-½" floppy drive
R486DX334F	i486DX-33 CPU, 4 MB, 3-½" floppy drive
R486DX2664F	i486DX2-66 CPU, 4 MB, 3-½" floppy drive
Classic R-Plus Systems	Features
R486SX254FP	i486SX-25 CPU, 4 MB, 3-½" floppy drive
R486SX334FP	i486SX-33 CPU, 4 MB, 3-½" floppy drive
R486DX338FP	i486DX-33 CPU, 8 MB, 3-½" floppy drive
R486DX2668FP	i486DX2-66 CPU, 8 MB, 3-½" floppy drive

Additional Information:

Chassis paint color is Fuller O'Brien 271026C Dusty Beige.  Chassis front bezel color is General Electric chip H86204.

Change History:

Power Supply (Classic R)	effective August, 1993

The Astec SA145-3420 power supply (145 watts) was replaced with the Astec SA145-3430-226 power supply (120 watts). The new supply is more efficient (> 62% @ Pin = 30W) and improves system performance in power-save mode by consuming less power.  One way in which this new supply  accomplishes this improved efficiency is to incorporate a fan speed control circuit which will run the fan at a lower speed until inner chassis temperature warrants an increase in cooling.  Both the 3420 and 3430 use the same fan, which is rated at 28 CFM.

Country Kit (Classic R/Classic R-Plus)	effective August, 1993

A product guide addendum (P/N 614953-001) was added to the country kit in addition to the existing product guide (P/N 612775-001). The addendum covers the new power management features, no-parity SIMM support, and other technical changes/corrections to the product guide.

The software driver diskettes were modified to include release 1.32 of the Cirrus Logic CL-542X video drivers and new power management software for Microsoft Windows 3.1.  The 1.32 driver diskette part numbers are 615266-001 (Classic R) and 615267-001 (Classic R+).

Country Kit (Classic R/Classic R-Plus)	effective January, 1994

The software driver diskettes were updated to include release 1.40 of the Cirrus Logic CL-542X video drivers.  The 1.40 driver diskette part numbers are 619784-001 (Classic R) and 619783-001 (Classic R+).

Front Bezel (Classic R/Classic R-Plus)	effective February, 1994

The plastic front bezel design was modified to incorporate "keyhole" cut-outs instead of the upper two plastic tabs. These cut-outs allow the upper portion of the bezel to be attached to the front of the chassis by two screws instead of plastic tabs, resulting in a more secure bezel attachment. Existing versions of the chassis already contain the necessary threaded holes on the front panel and no modifications are required.

LED Wire Harness (Classic R/Classic R-Plus)	effective February, 1994

A ferrite core is being added to the cables that connect the front panel LEDs to the motherboard. This ferrite core reduces marginal EMI characteristics seen during the Classic R+ system qualification process.

IDE Hard Drive Cable (Classic R/Classic R-Plus)	effective April, 1994

The IDE hard drive cable is being reduced from 24 inches to 18 inches in length to ensure compliance with the IDE AT specification.  Although the existing cable length has not resulted in any known problems to date, this change will help ensure that noise-related problems do not arise with the next generation of hard drives.  Future hard drives will utilize higher data transfer rates and will therefore display a higher sensitivity to signal noise.

ISA Card Guide (Classic R/Classic R-Plus)	effective April, 1994

The metal bracket (with plastic inserts) card guide assembly in the front of the chassis will be replaced with a newly designed snap-in plastic card guide. This change is being made to allow both ISA- and PCI-based LPX systems to share the same chassis design.

Ferrite bead tie-wrap (Classic R/Classic R-Plus)  effective 5/94

A tie-wrap will be added to secure the front panel wiring ferrite bead. This is being added because of a limited number of field reports of this ferrite bead breaking during shipment.

Intel Inside Logos  (Classic R/Classic R-Plus)  effective 6/94

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.

Country Kit (Classic R/Classic R-Plus)	effective  9/94

The software driver diskettes were updated to include release 1.43 of the Cirrus Logic CL-542X video drivers and Powr Manager V2.0.  The 1.43 driver/Power Manager V2.0 diskette part numbers are 629035-001 (Classic R) and 629036-001 (Classic R+).


Classic R-Series Orderable Spare Parts List
Orderable Spare Parts

April, 1994

PART NUMBER	DESCRIPTION
612209-xxx	Classic R Board, i486SX-25, 4 MB
612477-xxx	Classic R Board, i486SX-33, 4 MB
612478-xxx	Classic R Board, i486DX-33, 4 MB
612479-xxx	Classic R Board, i486DX2-66, 4 MB
615529-xxx	Classic R-Plus Board, i486SX-25, 4 MB
615531-xxx	Classic R-Plus Board, i486SX-33, 4 MB
615533-xxx	Classic R-Plus Board, i486DX-33, 8 MB
615535-xxx	Classic R-Plus Board, i486DX2-66, 8 MB
455114-003	Floppy Drive, 3.5", 1.44 MB
614703-003	Power Supply, 145 Watt
612815-001	3-slot Riser Card Assembly (Classic R)
519200-001	5-slot Riser Card Assembly (Classic R-Plus)
518761-003	Cable Assembly, Floppy Drive
519148-003	Cable Assembly, Hard Drive
613032-001	Cable Assembly, LED
612294-001	Chassis Assembly, Complete (Classic R)
613028-001	Chassis Assembly, Base (Classic R)
519168-003	Chassis Assembly, Top Cover (Classic R)
613029-001	Chassis Assembly, Front Bezel (Classic R)
519146-004	Chassis Assembly, Complete (Classic R-Plus)
615007-001	Chassis Assembly, Base (Classic R-Plus)
519168-003	Chassis Assembly, Top Cover (Classic R-Plus)
613029-001	Chassis Assembly, Front Bezel (Classic R-Plus)
613030-001	Cover, 5.25" Peripheral, Plastic
613031-001	Cover, 5.25" Peripheral, EMI, Metal
613034-001	Cover, Power Switch
519619-001	I/O Shield
613035-001	Peripheral Carrier, 3.5"
108520-001	Power Cord, 125 V., 6 ft.
202168-001	3V Lithium Coin-Cell Battery
618021-001	60mm Aux. Fan
623249-001	80mm Aux. Fan (for use with card guide 622355-001)
622355-001	Three Slot Plastic Card Guide


Classic R-Series BIOS History
BIOS History

April, 1994

All Classic R-Series and R-Series Plus products utilize the same Phoenix Technologies system and Cirrus Logic video BIOS incorporated in an Intel 28F001B FLASH EEPROM device.  This 1 Mbit (128 KB) FLASH device (part number 201358-222) resides at location U16 on the PB and is easily upgraded using the FLASH update utility FMUP.EXE.  The latest FLASH update utility and BIOS code can be downloaded from the iPAN bulletin board.  See FLASH BIOS Upgrade for information regarding BIOS upgrades.

Version 1.00.02.AC0	effective April, 1993

Initial production release of the Classic R-Series system and video BIOS.

Version 1.00.03.AC0	effective June, 1993

This release of the Classic R-Series system and video BIOS was not officially released into production due to a problem which sometimes caused the VLSI 82C480 chip set to be programmed for non-parity memory when parity SIMMs were installed.  However, this version of the BIOS was made available to customers on a request basis and incorporates the following features:

System BIOS

Corrects the problem which allowed entry to the CMOS setup program when the CMOS SETUP jumper on the system board was set to DISABLED.

New version of the Cirrus video BIOS (CL-GD540x/542x version 1.20).  This replaces the Beta 3 version that was used previously.

Corrects a problem which required a double-boot sequence instead of a single boot during testing in the manufacturing process - this problem was not visible to customers.

Setup

When the Onboard Diskette entry is set to Disabled, both the Diskette A and Diskette B entries offer a 3.5", 2.88 MB option.  The onboard controller does not support the 2.88 MB floppy format.

CMOS setup options for Cache allow selection of Disabled, Memory Only, or System & Video BIOS, Memory. These additional secondary cache selections were necessary since the VLSI 82C480 chipset does not properly write-protect cached BIOS regions. Some applications attempt to write to the cached BIOS areas and can cause a system hang if BIOS caching is enabled.

The new Power Save Mode: Hot Key (CTRL-ALT- ) entry allows selection of the key used in conjunction with the CTRL and ALT keys to initiate the power management features of Classic R.  Any key can be used except Setup command keys or those that are not passed on to the keyboard controller.  The Hot Key is only recognized from a DOS prompt.

The new Power Save Mode: Video Mode and Power Save Mode: Hard Drive Spin Down entries also support the power management features of Classic R.  These entries allow selection of a power-down mode for the video monitor and specify whether the hard drive spins down, respectively, when Classic R enters Power Save mode.

Version 1.00.04.AC0	effective July, 1993

This release of the Classic R-Series system and video BIOS incorporates the following features:

System BIOS

Powering up the system with no SIMMs installed now generates a 1-3-3 beep code.

Support for the keyboard lock feature was removed since it is not supported by the VLSI 82C113 keyboard controller.  The "Keyboard is Locked - Please Unlock" message (error 060) will never be generated.

Support is added for non-parity SIMMs.  If the BIOS detects the presence of a non-parity SIMM in either memory bank during POST, parity checking is disabled - parity checking will be enabled only if parity SIMMs are detected in both banks.

The disk initialization code was modified to update the floppy drive count information in the CMOS data area (byte 14H) as well as in the BIOS data area (40h:10h).  This modification eliminates a warning generated by some applications that check the CMOS floppy count byte.

The Intel EtherExpress 16C LAN adapter Softset utility no longer fails - INT19 is now properly handled by the system BIOS.

Video power save mode will not be entered if an add-in video card is in use.

Setup

The hard drive parameter table has been updated.

The CMOS setup options for the Parallel Port entry allow selection of I/O addresses 3BCH, 378H, and 278H - each option can be selected as Output Only or Bi-directional.

The CMOS setup options for the Parallel Port Interrupt entry have been changed to Disabled (Polled Mode), IRQ5, and IRQ7. IRQ levels no longer correspond to a particular I/O address.

The CMOS setup options for the Serial Port 1 entry have been changed to Disabled, 3F8H, 338H, 3E8H, 2E8H, and 220H.  Serial Port 2 options have been changed to Disabled, 2F8H, 238H, 2E8H, 2E0H, and 228H.

The CMOS setup options for the Power Save Mode: Hard Drive Spin Down entry have been changed to Enabled and Disabled.

Version 1.00.05.AC0	effective July, 1993

This release of the Classic R-Series system and video BIOS was released into production on an emergency ECO basis and incorporates the following features:

System BIOS

Fixes a hang condition that occurred at bootup when 128KB of L2 cache was installed in a system with BIOS version 1.00.04.AC0. This problem only existed in version 1.00.04.AC0 and did not occur with L2 cache sizes of either 64KB or 256KB.

The boot block BIOS was updated to correct a system hang condition that occurred when performing a Flash recovery sequence using a DOS 6.0 recovery boot diskette. Systems that contain the previous version of boot block BIOS can be identified by a part number of 615026-001 (or lower) on the Flash device located at location U16 on the system board. Flash devices containing the version that fixes the recovery hang problem have a part number of 615402-001 (or higher). Note that any recovery boot diskette formatted with a DOS version lower than 6.0 works properly with any version of the boot block BIOS.

Version 1.00.06.AC0	effective August, 1993

This release of the Classic R-Series system and video BIOS incorporates the following features:

System BIOS

Corrects a problem which prevented the remote boot option from working when the onboard IDE controller was disabled in CMOS setup. This problem was seen on Intel EtherExpress network adapters using an optional Novell boot ROM device and also affected other network adapters in a remote boot configuration.

Modified the delay provided by the INT15 service routine which corrects a timing problem seen in a CA Clipper application.

New version of the Cirrus Logic VGA video BIOS (CL-GD5422/5424/5426/5428 version 1.30).

Version 1.00.07.AC0	effective October, 1993

This release of the Classic R-Series system and video BIOS was released into production on an emergency ECO basis and incorporates the following features:

System BIOS

Corrects a 1.1% fallout rate seen in manufacturing test due to intermittent "Floppy Drive 0 Failure" error.  The error was seen during POST after power up and was traced to the SMC 651 I/O chip not powering up in a known state.  BIOS 1.00.07.AC0 implements a workaround by forcing the I/O chip into a known state at power up and does not incorporate any other changes.  There are no other known problems associated with this I/O chip power up condition.  Although there have been no reported problems in the field due to this condition, if the above error message is seen at power up, it is recommended that the system first be upgraded to the new BIOS to see if the error condition goes away.

Version 1.00.08.AC0	effective February, 1994

This release of the Classic R-Series system and video BIOS incorporates the following features:

System BIOS

Fixes a CMOS corruption problem that occurred with certain DigiBoard adapter cards.

The algorithm for determining serial and parallel ports in the system has been updated.  This fixes the problem where offboard port addresses would appear twice in the BIOS data area.  Also, if a conflict is detected, the user will be prompted to enter Setup, where a "Serial Port Conflict" and/or "Parallel Port Conflict" message will appear.  It is up to the user to resolve the conflict.

The BIOS key click volume parameter in the BIOS data area now defaults to 0, i.e. silent.

The ASTF single boot code was updated to ensure that the century byte is 19H and that the time registers in the Real Time Clock are set to less than their maximum value.

The vertical refresh rate is correctly set to 72Hz when 640x480 driver is in use (assuming that 72Hz has been enabled in Setup).

A workaround was placed in the BIOS to prevent screen flicker that appeared prior to video initialization on some older model monitors in conjunction with the C-stepping of the Cirrus GD5424 video controller.

New version of the Cirrus Logic VGA video BIOS (CL-GD5422/5424/5426/5428 version 1.41).

Version 1.00.09.AC0	effective April, 1994

This release of the Classic R-Series system and video BIOS incorporates the following features:

System BIOS

Fixes a problem that occurred in DOS when using the power save hot-key to spin down a Quantum LPS170AT hard drive.  This problem also occurs when using the power management screen saver in Windows and is fixed with version 1.42 of the POWERMAN.386 driver available on the Intel APPS BBS.  This problem only affected spin-down operation -- the Quantum hard drive operated normally in all other respects if the power save mode was disabled.

Fixes a system hang condition that occurred when performing a Ctrl-Alt-Del with the ATI Ultra Pro video card installed in the system.


Classic R-Series Software Driver History
Software Driver History (Classic R)

February, 1994

All Classic R-Series systems include a country kit that contains a CL-GD542X Display Drivers diskette.  The Cirrus Logic display drivers provide support for additional features of the CL-GD5424 Super VGA video controller such as greater speed, higher resolution, and more available colors.  Additional display driver support for Microsoft Windows 3.0, IBM OS/2, and the CLMODE utility are not included on the driver diskette but can be downloaded either from the Intel iPAN BBS or directly from the Cirrus Logic BBS at (510) 440-9080.

612530-001	effective April, 1993

Initial production release of the R-Series CL-GD5424 Display Drivers diskette that incorporates Release 1.30 of the Cirrus Logic DOS and Windows display drivers.  This release includes video driver support for the applications listed in the following table:

Application	Release Version
AutoCad 286	R 9, 10, 11
AutoCad 386	R 10, 11
AutoCad 386	R 12
AutoDesk 3D Studio	V 1.0
AutoShade	V 1.x
AutoSketch	V 3.x
AutoShade w/RenderMan	V 2.0
Gem/3	V 3.0
Ventura Publisher	V 3.0
Lotus 1-2-3	V 2.x
Lotus 1-2-3	V 3.0
Lotus 1-2-3	V 3.1
Windows	V 3.1
Word	V 5.0 V 5.1
WordPerfect	V 5.1
WordStar	V 5.5, 7.0
WordStar 2000	V 3.5
615266-001	effective August, 1993

The R-Series CL-GD5424 Display Drivers and Power Manager diskette was upgraded to include Release 1.32 of the Cirrus Logic DOS and Windows display drivers.  This release also included new power management and installation software as well as video driver support for the applications listed in the following table:

Application	Release Version
AutoCad 286	R 9, 10, 11
AutoCad 386	R 10, 11, 12
AutoDesk 3D Studio	V 1.0, 2.0
AutoDesk ADI	V4.2
AutoShade	V 1.x
AutoSketch	V 3.x
AutoShade w/RenderMan	V 2.0
Gem/3	V 3.0
Ventura Publisher	V 3.0
Lotus 1-2-3	V 2.x
Lotus 1-2-3	V 3.x
Windows	V 3.1
Word	V 5.0 V 5.5
WordPerfect	V 5.1
WordStar	V 5.0, 7.0
WordStar 2000	V 3.5, 4.0
619784-001	effective January, 1994

The R-Series CL-GD5424 Display Drivers and Power Manager diskette was upgraded to include Release 1.40 of the Cirrus Logic DOS and Windows display drivers.  This release also included new versions of the installation and power management software.  See the above tables for driver supported applications.

629035-001	effective September, 1994

The R-Series CL-GD5424 Display Drivers and Power Manager diskette was upgraded to include Release 1.43 of the Cirrus Logic DOS and Windows display drivers.  This release also included new versions of the installation and power management software designated Power Manager V2.0.  See the above tables for driver supported applications.


Classic R-Series Software Driver History
Software Driver History (Classic R-Plus)

February, 1994

All Classic R-Series Plus systems include a country kit that contains a CL-GD542X Display Drivers diskette.  The Cirrus Logic display drivers provide support for additional features of the CL-GD5428 Super VGA video controller such as greater speed (Windows acceleration), higher resolution, and more available colors.  Additional display driver support for Microsoft Windows 3.0, IBM OS/2, and the CLMODE utility are not included on the driver diskette but can be downloaded either from the Intel iPAN BBS or directly from the Cirrus Logic BBS at (510) 440-9080.

615267-001	effective August, 1993

Initial production release of the R-Series CL-GD5428 Display Drivers and Power Manager diskette that incorporates Release 1.32 of the Cirrus Logic DOS and Windows display drivers.  This release includes power manager and installation software as well as video driver support for the applications listed in the following table:

Application	Release Version
AutoCad 286	R 9, 10, 11
AutoCad 386	R 10, 11, 12
AutoDesk 3D Studio	V 1.0, 2.0
AutoDesk ADI	V4.2
AutoShade	V 1.x
AutoSketch	V 3.x
AutoShade w/RenderMan	V 2.0
Gem/3	V 3.0
Ventura Publisher	V 3.0
Lotus 1-2-3	V 2.x
Lotus 1-2-3	V 3.x
Windows	V 3.1
Word	V 5.0 V 5.5
WordPerfect	V 5.1
WordStar	V 5.0, 7.0
WordStar 2000	V 3.5, 4.0
619783-001	effective January, 1994

The R-Series CL-GD5428 Display Drivers and Power Manager diskette was upgraded to include Release 1.40 of the Cirrus Logic DOS and Windows display drivers.  This release also included new versions of the installation and power management software.  See the above tables for driver supported applications.

629036-001	effective September, 1994

The R-Series Plus CL-GD54248 Display Drivers and Power Manager diskette was upgraded to include Release 1.43 of the Cirrus Logic DOS and Windows display drivers.  This release also included new versions of the installation and power management software designated Power Manager V2.0.  See the above tables for driver supported applications.


Introduction to the Classic R-Series
Introduction to the Intel486 Classic R-Series Microcomputer

The Intel486 processor-based Classic R-Series is a low profile desktop design which features a local bus SuperVGA solution along with power saving features in a very affordable platform.

A wide range of CPUs provides immediate performance flexibility and the single 238-pin ZIF (Zero Insertion Force) processor socket allows an easy upgrade path to higher performance in the future. The Type 2 processor socket accepts either an i487SX chip to enhance performance with numeric intensive applications, or an OverDrive™ Processor, Intels upgrade component that doubles the speed of all i486 CPU internal processes. Support for the next generation OverDrive Processor, based on the Pentium CPU, protects todays investment in the Classic R-Series. Performance also may be enhanced by installing standard SRAM devices for up to 256 KB of secondary cache.

Two levels of graphics performance are available from the Classic R and the Classic R-Plus systems. Both graphics subsystems are local bus SuperVGA solutions including an integrated 24-bit RAMDAC and clock synthesizer. Classic Rs solid performance comes from a Cirrus Logic CL-GD5424 located on the i486 local bus. The Classic R-Plus achieves even greater performance by utilizing the Windows acceleration features of the Cirrus Logic CL-GD5428.

The Classic R-Series platforms easily comply with the requirements of the EPA Energy Star* program. System power consumption is reduced by the highly integrated design, while the BIOS and software utilities support user-definable options to spin down the hard drives and turn off the monitor. Software drivers are supplied to provide power management capabilities while running Windows 3.1.

With three slots and four bays, the Classic R platform provides the expandability needed for traditional desktop PC applications. For those environments requiring additional expansion, the Classic R-Plus platform incorporates two additional half-length slots for a total of five. The system integrates IDE hard disk and floppy disk controllers on the motherboard, along with PS/2*-style keyboard and mouse connectors, two 9-pin serial ports and one 25-pin parallel port.

The mini-LPX board  with i486 CPU, upgradable cache, and integrated video  is the smallest motherboard solution on the market today that is upgradable to an OverDrive processor based on Pentium technology.


Classic R-Series System Features Menu

This document outlines the features and specifications of the Intel Classic R-Series product line.  A basic understanding of the R-Series will be provided by detailing the features, capabilities, and benefits of the product.  Detailed technical information is provided in the appendices for those users who would like to know more about interfacing additional hardware with the R-Series.

Memory	LPX Form Factor
Video Subsystem	Power Supply
Cache	Peripheral Bays
CPU	Front Panel
Battery Real Time Clock	Chassis
I/O Ports	Add In Cards
Phoenix Technologies BIOS	Back Panel Connector
Keyboard Utilities	Floppy Drive
VLSI Chip Set	Security
Power Management Utilities


Power Management Utilities

The EPA Energy Star Computers program requires that a system consume 30 watts or less while idle. To  meet this requirement, the Classic R-Series platforms come with BIOS features and software utilities which allow the sytem to spin down hard drives and power down monitors when the system is not being used. The BIOS setup allows users to select a DOS "hot key" combination that will immediately power down the monitor and hard drives, as configured in the setup. Power management drivers and utilities for Windows 3.1 are provided on a diskette along with the video drivers. Users have the option of clicking on an icon to invoke power management or configuring the screen saver to automatically power down the system after a pre-set period of inactivity. DOS 6.0 users may invoke the POWER.EXE utility to save up to an additional 6 watts when using an SL-enhanced i486 DX processor.

Table 1 lists the power consumption of the various processor types found in a standard Classic R system.  The configuration consists of a floppy drive, 4 MB of DRAM, 512 KB of video DRAM and no secondary cache. All measurements were obtained ising the Astec 3430 power supply.

Processor	POWER.EXE off	POWER.EXE on
i486 SX/25	18w	16w
i486 SX/33	19w	17w
i486 DX/33	19w	17w
i486 DX2/66	21w	18w
i486 SX/25 SL-Enhanced	17w	15w
i486 SX/33 SL-Enhanced	18w	15w
i486 DX2/66 SL-Enhanced	21w	15w
Table 1. Typical Processor Power Consumption

Adding hard drives, second level cache, video DRAM or additional system memory will increase the power consumption of the Classic R system. To determine the typical power consumption, add each of the appropriate values shown in Table 2.

System Component	Comments	Power Consumption
	Normal Operation	4w
Hard Disk Drive	Power Save Mode (spin down)	1-2w
Cache	128 KB	1w
	256 KB	2w
Video DRAM	1 MB	½w
System Memory	12 MB  (one additional 8 MB SIMM)	1w
Table 2. Power Consumption of additional components.

For example, a fully configured system with an i486 DX2/66 (18w), 256 KB of cache (2w), 1 MB of video DRAM (½w), 12 MB of system memory (1w), and a 340 MB hard drive (~2w) would consume approximately 23 watts when idle.


Classic R-Series Video Subsystem Features
Video Subsystem

The SVGA video subsystem supports backward software compatibility with MDA, CGA, EGA, and VGA video standards.  The Display ram is paged into 128 KB of RAM located between A0000H and BFFFFH.

Classic R

The standard configuration includes 512 KB of Video DRAM, allowing resolutions up to 1024 x 768 x 16 colors or 800 x 600 x 256 colors. The video memory can be increased to a total of 1 MB by adding four 256 KB x 4 fast page mode 70 ns DRAMs to the four DIP sockets on the system board to support resolutions of 1280 x 1024 x 16 colors or 1024 x 768 x 256 colors.

Classic R-Plus

The Classic R-Plus comes with a full 1 MB of video DRAM in the standard configuration supporting maximum resolutions of 1280 x 1024 x 16 colors or 1024 x 768 x 256 colors.

Video Connectors

A standard PS/2 15pin analog VGA connector is provided on the system back panel. A VESA compliant 8514/A feature connector is located on the baseboard. The 8514/A interface typically is used as a VGA pass-through when an auxiliary video subsystem is installed in one of the expansion slots, such as an 8514/A compatible video card or DVI board.

Video Drivers and Utilities

Video drivers and utilities for DOS and Windows 3.1 are shipped with the Classic R-Series system.  Included on the diskette are enhanced mode drivers for common MS-DOS software applications such as AutoCAD, AutoDesk, AutoShade, AutoSketch, GEM/3, Lotus 123, Microsoft Word, WordPerfect, WordStar, and Ventura Publisher. These drivers come in a compressed form and are extracted by using an installation utility provided on the diskette. The Video drivers for Windows 3.1 include a utility called SetRES which allows the user to change the screen resloution, number of colors, and large or small fonts while in Windows.  After the new options have been selected, the user can choose to immediately restart Windows or have the new options take place the next time Windows is started.  Video drivers for SCO and Interactive UNIX should be obtained from the respective UNIX vendor. Video drivers also are available for downloading from iPAN, the electronic bulletin board service of IntelTechDirect™.

See Also:

Software Driver History

Video Modes

Upgrade Parts


Cache Features

The Classic R-Series was designed to accept a second level cache using industry-standard SRAM. The VLSI 82C480 chipset includes a direct-mapped, write-back cache controller. The motherboard includes DIP sockets for installation of 64 KB, 128 KB, or 256 KB of cache SRAM and the VLSI 82C480 chip set includes a direct-mapped, write-back cache controller.  Some jumper changes may be required when installing cache memory.

See Also:

Upgrade Parts

Jumper Settings


Central Processing Unit (CPU) Features

The Intel486 Classic R-Series has a wide price/performance range to meet a variety of customer needs. Four base CPU options are available:

 an i486 SX running at 25 MHz or 33 MHz;

 an i486 DX at 33 MHz; or

 an i486 DX2 at 66 MHz.

The R-Series supports all of the functionality of the i486. Common features of the CPUs include backward compatibility with the 8086, 80286,  and i386 CPUs, burst mode bus cycles, and an on-chip 8 KB cache.  The cache is 4-way set associative, uses a write-through policy, and can be disabled via software.

The i486 DX CPU contains an on-chip numeric coprocessor to increase the speed of floating point operations. This coprocessor is backward code-compatible with i387 DX and i387 SX math coprocessors and complies with ANSI/IEEE standard 754-1985. The i486 SX does not include the numeric coprocessor. The i486 DX2 incorporates clock-doubling technology developed by Intel to offer the highest CPU performance available today.

Performance Upgrade

The Classic R-Series incorporates a single 238-pin (Type 2) processor socket allowing easy upgrades to CPU performance. All Classic R-Series systems can be upgraded with an OverDrive Processor  including future OverDrive Processors based on the Pentium architecture. These upgrades will provide significantly higher CPU performance and numerics capability. Systems with an i486SX CPU can improve floating point performance by installing an i487 SX in place of the CPU.  When replacing an i486SX CPU with an OverDrive Processor a jumper change is required on the system board.

See Also:

Upgrade Parts

Jumper Settings


Real-Time Clock, Keyboard Controller, and Battery Features

82C113A real-time clock and keyboard controller

The real-time clock (RTC), PS/2-compatible keyboard controller, and battery-backed CMOS RAM are contained within the VLSI 82C113A. This device provides a clock accurate to 12 minutes/year, 14 bytes of CMOS RAM for timekeeping, and 50 bytes of general non-volatile RAM for storage of setup information. All CMOS RAM is reserved for BIOS use. A jumper on the baseboard or a setup option can be used to set system CMOS to its default values.

Onboard battery

Battery power is provided by a 3V Sanyo lithium coin cell installed in a holder on the motherboard near the front of the chassis. The expected life of the battery is three years. Replacement batteries (Sanyo CR2032, or similar) can be ordered via Intel spare sales.

See Also:

Jumper Settings

Orderable Spare Parts List


I/O Ports Features

SMC FDC37C651 (SuperI/O)

Control for the integrated serial ports, parallel port, floppy drive and IDE hard drive interface is incorporated into a single component, the SMC FDC37C651. This component provides:

Two NS16450 UARTs (No FIFO support)

IBM and Centronics compatible bi-directional parallel port controller

Industry standard floppy controller (1.44 MB floppy support)

IDE hard disk decode and chip select

Speaker

The speaker is integrated onto the Classic R-Series motherboard to reduce unnecessary cabling and improve manufacturability. This piezo device can be enabled or disabled using the Setup utility or can be programmed via port 61H. A connector (J33) also is provided for installing an optional external speaker. The speaker provides error beep code information during the Power-On Self Test if the system cannot use the video interface. The R-Series product guide (Order # 612775-001) contains beep and error code information.


Phoenix Technologies BIOS Features

The Phoenix Technologies BIOS provides ISA compatibility. This BIOS, along with the Cirrus Video BIOS, is incorporated into an Intel 28F001B 1 Mbit FLASH EEPROM device (location U16) to facilitate easy BIOS upgrades from a floppy disk. BIOS upgrades will be available for download from iPAN, the electronic bulletin board service of IntelTechDirect™. The Classic R-Series supports video and system BIOS shadowing, allowing for the execution of any BIOS routines from fast 32-bit onboard DRAM memory instead of the slower 8-bit FLASH device.

FLASH Implementation

The Intel 28F001B 1 Mbit FLASH component is organized as 128 Kbit X 8 (128 KB). The Flash device is divided into five areas, as described in Table 2.

System Address		FLASH Memory Area
F0000H	FFFFFH	64 KB Main BIOS
EE000H	EFFFFH	8 KB Boot Block (Not FLASH erasable)
ED000H	EDFFFH	4 KB Flash User area (available)
EC000H	ECFFFH	Intel Reserved
E8000H	EBFFFH	CMOS Setup
E0000H	E7FFFH	Cirrus Logic GD542x Video BIOS
Table 1. Flash Memory Organization

The FLASH device resides in system memory in two 64 KB segments starting at E0000H, and is distributed in two different organizations, depending on the mode of operation. In Normal Mode address line A16 is inverted, switching the E000H and F000H segments so that the BIOS is organized as shown in the system address column above. Recovery mode removes the inversion on address line A16, swapping the E000H and F000H segments so that the 8 KB boot block resides at FE000H where the i486 expects the bootstrap loader to exist. This mode is only necessary in the unlikely event that a BIOS upgrade procedure is interrupted, causing the BIOS area to be left in an unusable state.


BIOS identifier/revision level

The Classic R-Series BIOS sign-on during POST is 1.00.07.AC0.  As BIOS updates occur, the BIOS revision number will increment by one (i.e. 1.00.07.AC0 increments to 1.00.08.AC0)

Upgrade Utility

The FLASH upgrade utility (FMUP.EXE; downloadable from iPAN) has three BIOS upgrade options:

 The FLASH BIOS can be updated from a file on a disk;

 The current BIOS code can be copied from the FLASH EEPROM to a disk file as a backup in the event that an upgrade cannot be successfully completed; and

 The BIOS in the FLASH device can be compared with a disk file to ensure the system has the correct BIOS version.

Setup UTILITY

Classic R-Series incorporates many commonly used system setup features into the FLASH EEPROM. The setup utility is accessible only during the Power-On Self Test by pressing the <F1> key at the 135 POST code.  A screen prompt for this key press can be enabled or disabled. The ROM-based setup allows the system configuration to be modified without opening the system for most basic changes.

Flash User area

Classic R-Series supports a 4 KB programmable Flash User area located at ED00-EDFF. A programmer may use this area to display a customized message or to execute a small program. The Classic R-series BIOS accesses the user area just after completing the POST (Power-On Self-Test) if the setup option is enabled. The flash user area may be updated by running the FMUP.EXE utility, which expects the update files to have a .USR extension. Sample programs and instructions are in the file CLSUSER.ZIP on the iPAN bulletin board.

See Also:

Jumper Settings

BIOS History Menu


Keyboard Utilities

•	CTRL-ALT-DEL: System software reset. This sequence performs a software reset of the system by jumping to the beginning of the BIOS code and running the POST operation, excluding memory tests.

•	CTRL-ALT-1 and CTRL-ALT-2: Turbo mode selection. CTRLALT1 sets the system for de-turbo mode (emulation of an 8 Mhz 80286 CPU using wait states) and CTRLALT2 sets the system for turbo mode (its normal operation at 25 MHz or 33MHz). Changing the Turbo mode may be prohibited by an operating system or application software.

See Also:

BIOS History Menu


VLSI Chip Set Features
VLSI Chip Set

82C480 Single Chip System Controller

 CPU reset control

 CPU internal cache control

 CPU burst mode control

 CPU interface control

 Integrated write-back cache controller with tag comparator

 Page-mode DRAM controller

 Burst line fill control logic

 Data bus conversion

 Parity generation/detection

 AT-BUS direction control

 Clock source for 82C206 and keyboard controller

 Chip select for keyboard controller and RTC

 Speaker control

 NMI logic

 Floating-point coprocessor interface

 Keyboard reset and gate A20 emulation logic

 DMA control

 Interrupt controller

 Real Time Clock

 Timers


LPX Form Factors
LPX Form Factor

The Classic R-Series motherboard matches the LPX/LPM standards established by Western Digital. This standard specifies the maximum board size, board mounting locations, connector locations for all external I/O features, and riser card pinout. The Classic R-Series meets all of these capabilities in a very small form-factor motherboard (LPM). Figure 1 illustrates the smaller size of the R-Series board by comparing the layout and mounting hole dimensions with those of the S-Series (LPX). A list of several chassis suppliers supporting the LPX standard is included in Appendix I.

Figure 1. Classic S-Series (LPX) and Classic R-Series (LPM) Motherboard dimensions.


Power Supply Features
Power Supply

A 145 watt switchable power supply (maximum power dissipation: 120 w) is integrated into the Classic R-Series to provide power for onboard resources, add-in cards, and peripherals. The Astec 3430 power supply can be set to operate at either 90-132VAC (5 Amps AC) or 180-264 VAC (3 Amps AC) using a switch on the back of the system. The Auxiliary AC power outlet is rated at 2A max. for 100-120V and 1A max. for 200-240V. Table 1 lists the current outputs.

DC Voltage	Max. Continuous Current	Peak Current 15 Seconds	Minimum  Current Load
+5V	18.0A	18.0	2.5A
-5V	0.3A	0.3A	0A
+12V	4.2A	6.0A	0.5A
-12V	0.3A	0.3A	0A
Table 2. Classic R-Series Current Outputs

Table 2 lists the current used by system resources. This information is preliminary and is provided only as a guide for calculating approximate total system power usage with additional resources added.

Resource	Typical Power
R-Series baseboard, 16 MB (8 MB each bank), 256K cache, 1MB Video DRAM	< 15 Watts
Teac 3½" Floppy drive	1.7 Watts
Table 3. Current Use by System Resources (Preliminary)

See Also:

Power Requirements


Peripheral Bays

Four peripheral bays offer ample expandability for add-in devices. The system provides two 5¼" half-height bays, one 3½" one-inch bay, and one 3½" 1.6" bay. Both 5¼" and one of the 3½" bay are accessible from the front panel. The final 3½" hard drive bay is internal. The two 5¼" bays also can accommodate a single 5¼" full-height drive.


i486 Classic Front Panel
Front Panel

The front panel provides access to the system power switch.  A power-on LED and a hard disk access LED provide visual system information. The front panel also provides access to three peripheral bays (two 5¼" and one 3½"), as described above.


Classic R-Series Chassis Features
Chassis Features

A slimline case gives the Classic R-Series a sleek look, while four peripheral bays and three ISA slots offer the expandability required for traditional PC applications.  A 145 watt power supply insures that the system can support installation of the maximum number of peripherals and add-in cards.  The Classic R-Series has been tested to ensure it meets stringent environmental requirements.


Classic R-Series Add In Cards
Add In Cards

The Classic R system provides three slots for full-length 16-bit ISA add-in cards. Viewed from the front of the chassis, all three cards are oriented horizontally on the left side of a riser card. The Classic R-Plus has two additional slots which support 16-bit half-length ISA add-in cards for a total of five slots. These additional slots are located on the right side of the riser card as viewed from the front of the chassis. A bracket on the Classic R-Plus chassis secures the half-length cards, eliminating the need to remove the system power supply.

Riser Card

The Classic R-Series riser card conforms to all LPX standards. The riser has all three 16-bit slots on the same side of the board and an opening is provided along the top of the riser card to allow cables to be routed from one side of the chassis to the other without interfering with the top cover. The bottom slot of the riser card is 1.2" above the motherboard to allow a full length add-in card to comfortably fit above a 1" high SIMM.


Classic R-Series Back Panel Connector
Back Panel Connector

The backpanel provides external access to all of the I/O devices integrated on the Classic R-Series motherboard. Figures 5 and 6 show the back panel connections for the Classic R and Classic R-Plus.

Figure 5. Classic R (three slot) Back Panel

Figure 6. Classic R-Plus (five slot) Back Panel


Model i486 Floppy Drive Features
Floppy Drive

Every Classic R-Series system has an integrated Teac FD-235HF floppy disk drive in the top 3½" bay.  This is the same proven floppy disk drive that is used on many other Intel systems.


Classic R-Series Security Features
Security

BIOS Password

A BIOS password feature provides security during the boot process. A password can be entered using the Setup utility and must be re-entered prior to disk boot each time the system is reset. The password can be changed at the password prompt by entering <old password>/<new password>/<new password><enter>.  The password also can be cleared by entering <old password>/<enter>. If the password is forgotten, it can be cleared by turning off the system and setting jumper J20 to 1-2. After the system has finishes the Power-On Self Test, turn the system off and reset jumper J20 to 2-3. This allows the user to again access the password feature, but with the forgotten password cleared.

Floppy Write-Protect Jumper

A jumper on the baseboard allows the floppy drive(s) to be write-protected to prevent the copying of data to a floppy diskette from any other data storage device. Setting jumper J17 to 2-3 enables the write protect feature.

Setup Enable Jumper

A jumper on the baseboard controls access to the BIOS Setup utility. By setting jumper J21 to 2-3, the user is prevented from accessing the Setup utility during the Power-On Self Test or at any other time.

See Also:

Jumper Settings

Orderable Spare Parts List


Classic R-Series Certification Letters Menu
Certifications Menu

Banyan Certification

Novell Certification

Safety Certifications

EMI Certifications

Intel Verification Lab Approval


Banyan certification for the Classic R-Series
Banyan Certification

The Classic R-Series is not currently Banyan certified.  However, Banyan was compatibility tested and no known Banyan compatibility issues exist at this time.


Novell Certification Letter for the Classic R-Series
Novell Certification

Classic R-Series	F-1695

by Intel Corportion	19 MAY 1993

Tested and Approved NetWare compatible as a File Server/Workstation with the following Novell products:

NetWare (v3.11)	NetWare SAA Token-Ring (v1.1 )

NetWare Lite (v1.1)	Novell Print Server (v1.21)

DR DOS (v6.0)	NetWare NNS (v1.0)

NetWare for Macintosh (v3.01 )	NetWare Access (v1.22)

LAN WorkPlace for DOS (v4.01 )	OnLAN/PC (v1.22)

NetWare 3270 LAN Workstation (v2.0)	NetWare Link/64 (v1.1 )

NetWare FTAM (v1.2)	NetWare Link/T1 (v1.1 )

NetWare Btrieve (v5.15)	NetWare Asynchronous Remote Router (v1.2a)

NetWare SQL (v2.11a)	NetWare Asynchronous Communications Server (v3.0)

Product Configuration:

Product Name/Model/Rev:	Classic R-Series i486DX2-66/R-Series/Rev. B

CPU Family/Clock Speed:	80486DX2/66 MHz

Controller(s)/Fixed Disk(s):	Integrated IDE Interface

IDE (124 Megabytes) Maxtor 7120A

Bus Type:	ISA (Three 16-bit slots)

ROM BIOS Version:	PhoenixBIOS(TM) A486 Version 1.00.02.AC0

Main/CPU Board Revision:	PBA 612477-001

CPU Memory:	Base 640 Extended 7168

Video Adapter:	Integrated VGA Model CL5424

Vendor Software:	MS DOS (5.0), MS Windows (3.1)

Novell Labs certification only applies to the exact configuration documented in this bulletin. For more information regarding the specific test configuration, please contact:

Intel Corporation

5200 NE Elam Young Parkway

Hillsboro,OR 97124-6497

(503) 696-8080

Disk controllers and drivers verified through testing:

Controller	Driver Name	Driver Date

Integrated IDE	IDE.DSK	11 JUN 1992

Adapters and drivers used in testing:

Adapter	Driver Type	Driver Name	Driver Date

Novell NE2000	3.11 Server	NE2000.LAN	26 JUL 1991

DOS IPXworkstation	SNE2000.0BJ	18 JUL 1990

DOS ODI workstation	NE2000.COM	03 JUN 1991

IBM Token-Ring 16/4	3.11 Server	TOKEN.LAN	09 SEP 1991

DOS IPX workstation	STOKEN.OBJ	23 AUG 1991

DOS ODI workstation	TOKEN.COM	14 JUN 1991

SMC PC-130 ARCNET	3.11 Server	TRXNET.LAN	07 JAN 1991

DOS IPX workstation	STRXNET.OBJ 	17 DEC 1990

DOS ODI workstation	TRXNET.COM 	06 AUG 1991

Novell NE2100	3.11 Server	NE2100.LAN	09 OCT 1991

DOS IPX workstation	SNE2100.0BJ	19 FEB 1991

DOS ODI workstation	NE2100.COM	11 OCT 1991

Novell NE1000	3.11 Server	NE1000.LAN	25 JUL 1991

DOS IPX workstation	SNE1000.0BJ	31 AUG 1990

DOS ODI workstation	NE1000.COM	29 JUL 1991

3Com EtherLink II (3C503)	3.11 Server	3C503.LAN	21 JAN 1991

DOS IPXworkstation	S3C503.0BJ	09 JAN 1992

DOS ODI workstation	3C503.COM	14 JUN 1991

3Com EtherLink Plus (3C505) 2012	3.11 Server	3C505.LAN	17 JAN 1991

DOS IPXworkstation	S3C505.0BJ	17 JAN 1991

DOS ODI workstation	3C505.COM	29 JUL 1991

Intel EtherExpress(tm) 16	3.11 Server	EXP16.LAN	18 NOV 1991

DOS IPXworkstation	EXP16SH.OBJ	10 APR 1992

DOS ODI workstation	EXP16ODI.COM	27 JAN 1992

Novell WNIM+ Adapter	Communications	COMWNIM.COM	23 JAN 1992

Novell Synchronous/V.35+	Communications	(Built into software)


Intel Verification Lab Approval for the Classic R-Series
Intel Verification Lab Approval

The Classic R-Series has been approved by Intel Verification Labs for processor upgradability.  The system was  noted as IVL System # SV13.


Classic R-Series Compatibility List
Compatibility List

Operating Systems

SCO UNIX Open Desktop  v2.0

Interactive UNIX V.4.3

IBM OS/2 v2.1GA

Intel OS/2 v1.3

Microsoft Windows 3.1

Microsoft DOS v6.0

Microsoft DOS v5.0A

Microsoft DOS v4.01

Microsoft Windows NT v3.1

Digital Research DOS (DR DOS) v6.0

Network O/S and Network Cards

Novell Netware 386 v3.11, Server

Novell Netware 286 v2.2, Server

Novell NetWare Workstations

IBM TokenRing 16/4

Novell NE2000 TP

Novell NE2000

Banyan Vines v5.5, Server

Banyan Vines Workstation

IBM TokenRing 16/4

Novell NE2000

Novell NE2000 TP

Banyan ICA

Microsoft LAN Manager v2.2, Server

3COM 3C509

IBM Tokenring II Short Card

Madge Smart 16/4 Ring-Node

Intel EtherExpress 16

Software Packages Tested:

Lotus 1-2-3 r2.2

Lotus 1-2-3 for Windows v1.0

Symphony v2.2

Harvard Graphics v2.12

Harvard Graphics v2.3

Minitab v7.2

Word for Windows v1.1

Project for Windows v1.00

Excel for Windows v3.0

Excel for Windows v4.0

Power Point for Windows v3.0

Wordperfect for Windows v5.1

Grammatik v2.0

Grammatik v5.0 for Windows

Quatro Pro v3.0

Word Perfect v5.1

DBase IV v1.1

Autocad 11

Norton Utilities v4.5

Paradox v3.5

Mathematica v1.2

Mathematica v2.0

PageMaker for Windows v4.0

MODEMs & Communication S/W

Intel 2400ex modem

Hayes 9600 SmartModem

Procomm Plus v2.0

Intel Mtez

Crosstalk

First Choice

Intel SatisFAXtion 400

Intel SatisFAXtion modem 100

Benchmarks and Diagnostics

Landmark Benchmarks v2.0

PC Labs Benchmarks Bench 29 test

Matlab 387 v3.25

XTree Gold v1.3

PC Tech Journal VGA Suite v1.0

QAFE

PC Labs Benchmarks v7.0

Desqview

Memory and Drive managers

EMM386.sys

Himem.sys

Smartdrive.sys

RAMdrive.sys

Disk Optimizer v4.05

Fastback Plus v2.09

QEMM

Qualitas 386max

ViewMAX

TaskMAX

MemoryMAX

Misc. Software

Sidekick Plus v1.00a

Superkey v1.3

Prokey v3.0

Keyboards

Chicony AT

Tatung PS/2

IBM PS/2

Keytronics  AT

Hi-Tek AT

Hi-Tek PS/2

Cherry Narrow AT

Cherry Regular AT

OEMMAX AT

BTC AT

Mice

Microsoft PS/2 mouse

Microsoft serial mouse

Microsoft bus mouse

Logitech serial mouse

Logitech PS/2 mouse

Logitech Bus mouse

Mouse Systems

Memory Boards

Aboveboard Plus

JRAM

AST RAMpage

Video Adapters

Onboard

Orchid Farenheit 1280 1MB

ATI Ultra Pro 2MB

Paradise Plus 16

Disk Controllers

Onboard IDE

Acculogic IDE ISA

UltraStor 15C 2MB IDE ISA

Future Domain 168C SCSI ISA

Adaptec 1542B SCSI ISA

Adaptec 1542C SCSI ISA

Hard Drives and Tape

Connor CP30104H	IDE

Fujitsu M2622FA	SCSI

Quantum 105S	SCSI

Fujitsu M2624FA	SCSI

Seagate ST3283N	SCSI

Seagate 3283A	IDE

Maxtor LXT213SY	IDE

WD 2170A	IDE

Archive 2150S	SCSI

Maxtor 7120AT 	IDE

Quantum 120AT	IDE

Bernoulli Box II

EmulexDCP-286i

Emulex DCP-MUXi

CD ROM Drives

Toshiba XM-3301E1

NEC CDR-74-1

Sony CDU-6211

Multi-Media Sound Boards

SoundBlaster

Sound Blaster Pro 2

Sound Blaster 16ASP

ProAudio Spectrum 16

Microsoft Sound Board

Multimedia applications

Beethoven

Bookshelf 1992

Battle Chess

Mammals

MCS Stereo


Classic R-Series CMOS - Setup Usage
CMOS - Setup Usage

Setup stores hardware configuration settings in CMOS random-access memory (RAM), which is contained in the real-time clock (RTC) chip.  This memory storage is backed up by a battery even when power to the system is off.  The settings take effect when you boot up the system.  POST checks the settings against the actual hardware configuration.  If they do not agree, POST generates an error message or error code.  In this case, you must run Setup to correct the configuration error.

Setup Screen 1 Options and Default Settings

Setup Screen 2 Options and Default Settings

Setup Screen 3 Options and Default Settings


Setup Screen 1 Options and Default Settings

Choice	Settings
Time	Current time (no default)
Date	Current time (no default)
Onboard Diskette	Enabled Disabled
Diskette A	Not Installed 5.25", 360 KB 5.25", 1.2 MB 3.5", 720 KB 3.5", 1.44 MB 3.5", 2.88 MB*
Diskette B	Not Installed 5.25", 360 KB 5.25", 1.2 MB 3.5", 720 KB 3.5", 1.44 MB 3.5", 2.88 MB*
Onboard IDE	Enabled Disabled
Hard Drive 1	Type x  Not Installed
Hard Drive 2	Type x  Not Installed
User Definable Drives	2 and 3  48 and 49
Boot Device	Diskette or Hard Drive Hard Drive Only
POST Memory Test Prompt	Enabled Disabled
POST Setup Prompt	Enabled Disabled
Scan FLASH User Area	Enabled Disabled
Speaker	Enabled Disabled
Onboard Mouse	Enabled Disabled
Keyboard	Installed Not Installed
Numlock on at Boot	Yes No
Password	Installed Not Installed

The default is shown in bold type.

* - The 3.5", 2.88 MB option is available only if the Onboard Diskette option is set to "Disabled".


Setup Screen 2 Options and Default Settings

Choice	Settings
Base Memory	Display only; cannot be changed
Extended Memory	Display only; cannot be changed
Base Memory Above 512K	Enabled Disabled
Parallel Port	Address 3BCH: Output Only Address 378H: Output Only Address 278H: Output Only Address 3BCH: Bi-directional Address 378H: Bi-directional Address 278H: Bi-directional Disabled
Parallel Port Interrupt	IRQ7 IRQ5 Disabled (Polled Mode)
Serial Port 1	3F8H 338H 3E8H 2E8H 220H Disabled
Serial Port 2	2F8H 238H 2E8H 2E0H 228H Disabled
Video Type	Not Installed VGA/EGA CGA40 CGA80 MDA
Video Horizontal Refresh	31.5 kHz 31.5 & 35.5 kHz (8514) 31.5 - 35.1 kHz 31.5 - 37.8 kHz 31.5 - 48.0 kHz 31.5 - 56.0 kHz 31.5 - 64.0 kHz
640x480 (VGA) Vertical Refresh	Read-only (see Table 3-3)
800x600 Vertical Refresh	Read-only (see Table 3-3)
1024x768 Vertical Refresh	Read-only (see Table 3-3)
1240x1024 Vertical Refresh	Read-only (see Table 3-3)
VGA Mode Refresh Rate	Read-only when Video Horizontal Refresh is set within the range of 31.5 to 35.2 kHz 60 Hz (see Table 3-3) 72 Hz (see Table 3-3)
Onboard Video BIOS Mapping	To E0000H To C0000H

The default is shown in bold type.
Read-only states appear as gray type on the Setup screen.


Setup Screen 3 Options and Default Settings

Choice	Settings
CPU Speed	Fast Slow
Cache	Memory Only System & Video BIOS, Memory Disabled
Refresh Mode	Synchronous Asynchronous Decoupled
Shadow C0000 to C3FFF	Enabled Disabled
Shadow C4000 to C7FFF	Enabled Disabled
Shadow C8000 to CBFFF	Enabled Disabled
Shadow CC000 to CFFFF	Enabled Disabled
Shadow D0000 to D3FFF	Enabled Disabled
Shadow D4000 to D7FFF	Enabled Disabled
Shadow D8000 to DBFFF	Enabled Disabled
Shadow DC000 to DFFFF	Enabled Disabled
Power Save Mode: Hot Key <Ctrl-Alt-__>	(Any key) G
Power Save Mode: Video Mode	Screen Blank VESA Standby VESA Off VESA Suspend
Power Save Mode: Hard Drive Spin Down	Enabled Disabled

The default is shown in bold type.


Classic R-Series Errata

October 28, 1994

The following errata list is provided to assist users of the Intel Classic-R Series platforms in resolving any potential compatibility or usability issues. For clarification or additional information, please call your local Intel sales representative.

Open Items

ERRATUM:

The Digiboard PC/x adapter card has been shown to sometimes fail full duplex transfers and diagnostic tests.

CAUSE: Interrupt request signal initialization failure.  This failure is caused by a momentary increase in the ISA bus clock speed.  The ISA bus clock speed will change from its normal 8 Mhz to the system frequency (25 or 33 Mhz), and change back to 8 Mhz during the system initialization.  The temporary increase in the ISA bus clock speed causes the Digiboard circuitry to lock up and cause the interrupt request signal to fail.

WORKAROUND: No known workaround.

ERRATUM:

The first revision of the Classic-R / R-Plus Windows Power Management software would sometimes not restore the completely, leaving Black Bars at different locations on the display

CAUSE: Error in version 1.0 of power management software

WORKAROUND:  Version 2.0 of the Classic R / R Plus Windows Power Management S/W, due to be released August 1994

ERRATUM:

The Sound Blaster Pro Audio Card fails to correctly recreate 4-operator sound during the Sound Blaster-supplied install test.  The 2-operator and digitized sound portions of this test function normally.  The 4-operator test checks the DMA channel, the interrupt, and the port settings for conflicts.  The 4-operator sound is inaccurate and of poor quality.  This test works fine using the Sound Blaster Pro2 card.

CAUSE: Design problem with the Sound Blaster Pro card.

WORKAROUND: No known workaround.

ERRATUM:

The Microsoft Sound System card causes sound hesitations whenever three simultaneous sources are active.  The normal test combination of media player (CD audio) and/or jukebox (MIDI files) and chatterbox (WAV files) causes the sound to hesitate every 20-30 seconds.  This hesitation does not occur when the Sound Blaster Pro card is used.  This Erratum has also been seen on other systems using the Microsoft Sound System card.

CAUSE: Design problem with the Microsoft Sound System card.

WORKAROUND: No known workaround.

ERRATUM:

Microsoft Flight Simulator 4.0 may produce an unacceptable amount of screen flicker when running in a DOS compatibility box under IBM OS/2 2.0.  Flight Simulator operates normally if system is booted from DOS.

CAUSE: Microsoft acknowledges a problem in Flight Simulator when running in environments with a i486, certain graphics controllers, and high-performance operating systems such as OS/2.

WORKAROUND: No known workaround.

ERRATUM:

Certain keyboards may be incompatible with the Classic R-Series.

CAUSE: The VLSI 82C113 runs faster than a standard 8742-based keyboard controller.  This can cause problems with keyboards that have slower than usual timing.  To date, only two keyboards have been found that are incompatible with the Classic R-Series: Cherry G81-1816 and BTC-53.

WORKAROUND: No known workaround.

Closed Items

ERRATUM:

When using some hard disk drives with long spin up times, Power Manager V2.0 for Windows  causes the error  Serious disk error writing to drive C: when exiting the power manage state using the hard drive spin down option.  A retry of the write operation will restore normal operation of the system.   Specific failing drives are Conner Peripheral CFS420A and CP30104H.   Note that even though this error occurs, the drive data integrity is not effected.

CAUSE: The sequence of events in the Power Manager software combined with the spin up time of some hard disk drives can cause Windows to time-out while waiting to access the drive when returning from the power manage state.

WORKAROUND:  A new Power Manager file called FASTPMAN.386, which will correct the drive access time-out problem, can be used in place of the standard POWERMAN.386 Windows file.  This file has the drive spin up sequence modified to work with drives with slower spin up times.  The file can be copied over the existing POWERMAN.386 file in the Windows directory and is available from the Intel Product Support BBS in a self extracting ZIP file (FASTPMAN.EXE).

NOTE:  Due to the change in drive spin up sequence in the new FASTPMAN.386 code there exists a limitation regarding network access to local drives that are in a power manage state.  If a local hard disk drive is in a power manage spin down state and is accessed by a network, the drive will spin up and can be accessed by the network, but will not spin down until the Classic R/R+ system reenters another power manage cycle.  This limitation should be taken into account  when using the FASTPMAN.386 code to solve drive error problems.

ERRATUM:

In certain cases Power Manager V2.0 for Windows causes any window that was active before the power manage state was entered to be inactive when the system returns from power manage mode.

CAUSE: When a screen saver is used other than the supplied POWERMAN.SCR in the Power Manager Setup window, and entrance into power manage mode is interrupted before video shutdown and/or hard drive spin down has occurred, no windows will be active when the system is returned to the Windows screen.

WORKAROUND:  Use the Intel supplied POWERMAN screen saver in both the Windows Desktop setup and in the Power Manager Setup screens.

ERRATUM:

WordPerfect Office hot keys do not work when used from WordPerfect Shell.

CAUSE:  The power manager hot key in the BIOS conflicts with the hot keys defined in WordPerfect Shell causing the shell hot keys to fail.  This applies to BIOS 1.00.04.AC0 and above.

WORKAROUND:  Set the BIOS power manager hot key in the CMOS setup to CTRL-ALT-BACKSPACE.

ERRATUM:

Classic R+ systems containing the Actionmedia II card connected to the video feature connector, have shown problems running  applications which use the Actionmedia II card.  The Cirrus 5428 on the Classic R+ mother board will not properly transfer control from the standard VGA output to the video Feature Connector.  The result is the failure of the application which uses the Actionmedia II card resulting in this case results in a system hang.  The VSET software which is supplied with the Actionmedia II card is used to re-direct the video to the video feature connector.

CAUSE:  The root cause of this problem has been traced to a bug in the CM step of the Cirrus 5428 video chip.

WORKAROUND:   A later step of the Cirrus 5428 chip will eliminate this problem.  Later revisions of the 5428 video chip have shown proper functionality of the video feature connector with the Actionmedia II card.  Any system board that contains the CM step of the Cirrus 5428 video chip and fails when using the video feature connector in the manner described above should have the Cirrus 5428 chip changed to a chip that is NOT a CM step part.

Cirrus 5428 step identification.

The markings of a Cirrus 5428 chip are listed below:

CL-GD5428-80QC-A

xxxxx-xxxnn-y

zzzz z

<country name>

Line 1 is the part number of the chip.

Line 2 identifies the stepping of the chip.

xxxxx-xxx     are numerical characters.

nn    are letters that identify the step of the chip.  This is where step CM will appear.

y     is a letter or will not exist.

Line 3 is the date code of the chip.

zzzz  z  is the year and week the chip was manufactured. Year is first, week number follows.

Line 4 is the country where the chip was manufactured.

Note that the CM step chips were manufactured during weeks 35-40 of 1993, i.e. 9335 - 9340.

ERRATUM:

Older versions of the  Digiboard COMX/i adapter card have been shown to cause boot failures where the Classic-R series will fail to boot from power off before the BIOS banner is displayed approximatley 10% of the time..

CAUSE: Incomatable bus accesses between the Digiboard and the Classic-R series POST routine.

WORKAROUND: A rev K Digiboard COMX/i has been proven to not cause this problem.

ERRATUM:

The Digiboard COMX/i adapter card has been shown to cause CMOS checksum errors at a rate of 1% to 2% at boot time.

CAUSE: Incompatable bus accesses between the Digiboard and the Classic-R series POST routine.

WORKAROUND: A rev K Digiboard COMX/i has been proven to not cause this problem when used with a Fab F based motherboard (AA -100 or above).

ERRATUM:

The Intel TokenExpress ISA/16s (product code PCLA8130A), Olicom 16/4 Token Ring, IBM Token Ring Network 16/4 Adapter II Token Ring, and Eicon HSI X.25 cards have been determined to be incompatible with the VLSI 82C480 chip set and will not work with the Classic R-Series.

CAUSE: Design problem in the VLSI 82C480 chip set which requires a longer interrupt request time than the minimum allowed by the IEEE PC Bus Specification.  The network adapters listed above have interrupt request times that are longer than the PC bus minimum but are not long enough to be recognized by the VLSI 82C480 chip set.

WORKAROUND: The Intel TokenExpress ISA/8, IBM Token Ring II, IBM Token Ring Network 16/4, 3COM TokenLink, and Proteon P1390 Token Ring adapters have been tested and are compatible with the Classic R-Series.  The Intel TokenExpress ISA/16s adapter will undergo a revision that will make it compatible with Classic R in early-mid Q4, 1993 (product code PCLA8130R).

In addition, the Classic R/R+ motherboard will undergo a revision in April 1994 (AA# -100) that will "stretch" interrupts 5, 9, 10, and 11 thereby allowing the above adapters to work properly if configured to use one of these interrupts.

ERRATUM:

If a front panel keylock is activated before the system is booted, the BIOS mistakenly reports a message during POST that the keyboard is locked.  If the keylock is switched to the disabled mode during DOS operation, the keyboard is not disabled.

CAUSE: The keyboard controller in the VLSI 82C113 device does not support the KEYLOCK feature when it is programmed for PS/2 mode.

WORKAROUND: Support for the keylock feature was removed in BIOS 1.00.04.AC0.

ERRATUM:

Add-in cards that use ISA mapped memory and latch the LA address lines during DMA cycles may be incompatible with Classic R.

CAUSE: The VLSI 82C480 chip set has a known Erratum due to the fact that the 82C480 multiplexes the function of RAMW# and EALE# on the same pin and EALE# is driven high during DMA cycles.  This will cause the VL82C113/113A to latch the LA address lines.

The problem will only occur if an add-in card is installed that uses ISA mapped memory that latches memory address on the falling edge of memory write.  If an application accesses that memory just prior to a DMA operation there is a chance an invalid memory address will be latched.  The result would be a DMA write operation to the wrong location.

Extensive compatibility testing involving a wide variety of network, SCSI, and other add-in cards failed to reveal any other compatibility issues due to this Erratum.  To date, we have seen this problem occur only with an add-in VGA video card running with Microsoft Windows.  For example, if the mouse is moved during a floppy DMA transfer then video memory can be corrupted and pixels will appear to "drop" from the display.  This is caused by the DMA operation incorrectly writing to the video memory - system memory will not be corrupted and the system continues to operate normally in all other respects.

WORKAROUND: This erratum was fixed with the release of -004 PBA revisions (Rev D fab) in 7/93.

ERRATUM:

Novell client software reports parity errors when two NE2000A cards and an Adaptec 1542B SCSI controller are used.  Also, using a WANG WLOC network card sometimes causes the message "Error 983: Unresolved I/O Expansion Board NMI" to be displayed - disabling NMI after this message is displayed allows normal operation of this adapter card.

CAUSE: Noise on the ISA MEMR# signal caused by the VLSI 82C480 chip set.

WORKAROUND: This erratum was fixed with the release of -004 PBA revisions (Rev D fab) in 7/93.

ERRATUM:

The VESA feature (8514/A) connector on the system board is not functional.

CAUSE: This is a known Erratum with the BF stepping of the Cirrus Logic GD5424 graphics controller.  An external RAMDAC on the ISA bus is not recognized by the system because the CL-GD5424 blocks access to the ISA bus for RAMDAC read and write operations.

WORKAROUND: This Erratum was fixed with the C-step revision of the CL-GD5424 released into production on -005 PBA revisions in 10/93.

ERRATUM:

LAN adapters which have a network boot ROM device installed are not recognized by the system BIOS following a reboot if the Onboard IDE setup option is disabled.  In a "floppy-only" configuration the system attempts to boot directly from the floppy drive and does not pass control to the LAN adapter ROM as expected.  Systems that are configured with an IDE hard disk drive will recognize the LAN adapter properly and allow a remote boot across the network.

CAUSE: This problem is caused by a bug in the system BIOS.  Although this problem was initially seen using an Intel Ether Express LAN adapter, it is believed that all LAN adapters supporting the network boot feature are affected.

WORKAROUND: System BIOS 1.00.06.AC0 corrected this erratum.

ERRATUM:

The extended memory test in QAPLUS/fe version 5.11 causes a system reboot if L2 cache memory is enabled.

CAUSE: QAPLUS/fe makes use of a CPU feature (page cache disable bit) that is not supported by the Classic R-Series.

RESOLUTION: No known workaround other than to disable L2 cache via CMOS setup prior to running the QAPLUS/fe extended memory test.

ERRATUM:

The Intel EtherExpress 16C LAN adapter Softset utility fails when run with the Classic R-Series.

CAUSE: The system BIOS does not properly handle INT19.

RESOLUTION: System BIOS 1.00.04.AC0 corrected this erratum.

ERRATUM:

System hangs during startup if 128Kb of L2 cache memory is installed and the BIOS version is 1.00.04.AC0.  This erratum only existed in BIOS version 1.00.04.AC0 and did not occur with L2 cache sizes of either 64Kb or 256Kb.

CAUSE: A bug was introduced in the 1.00.04.AC0 version of the system BIOS.

RESOLUTION: System BIOS version 1.00.05.AC0 corrects this Erratum and was released into production in early Q3 on an emergency ECO basis.

ERRATUM:

System hangs during the FLASH recovery sequence using a DOS 6.0 recovery boot diskette.  The FLASH recovery sequence normally allows the system to be returned to a bootable state in the event that a FLASH upgrade operation is interrupted by loss of power, for example.

CAUSE: A bug existed in the boot block BIOS which disabled interrupts - DOS 6.0 requires use of the keyboard and timer interrupts during the boot process.

RESOLUTION: A new version of the boot block BIOS was released with system BIOS version 1.00.05.AC0 on an emergency ECO basis.  Systems containing the previous version of boot block BIOS can be identified by a part number of 615026-001 (or lower) on the FLASH device located at U16 on the system board.  FLASH devices containing the version of boot block BIOS that fixes the recovery hang erratum have a part number of 615402-001 (or higher).  Note that any recovery boot diskette formatted with a DOS version lower than 6.0 works properly with any version of the boot block BIOS.

ERRATUM:

Add-in cards that use devices which are sensitive to overshoot on the ISA bus may be incompatible with Classic R.

CAUSE: This is a known Erratum with the VLSI 82C480 chip set.  Fast edge rates coming out of the 82C113 address lines and the 82C480 control lines causes ringing and overshoot of 7.8 to 8.0 volts.

WORKAROUND: No known workaround. This Erratum was seen on a custom ISA card that used a PAL22V10 to decode ISA signals and generated invalid glitches during large DMA transfers.  The PAL22V10 device is known to be susceptible to overshoot - cards which buffer ISA signals should not experience this problem.

ERRATUM:

Keyboard controller in the VLSI 82C113A device does not report the correct status when the PS/2 mouse and keyboard interface tests are executed.  The test returns a status of 01H rather than the correct value of 00H.  The following problems have resulted from this bug:

The SCO ODT 2.0 login screen will not start following installation because the operating system improperly fails to recognize the PS/2-style mouse.

Novell servers that use the PS/2-style mouse port to talk to an uninterruptible power supply (UPS) will shut down as soon as the UPS driver is started.

The Microsoft Mouse INSTALL utility incorrectly reports that the mouse was not found.  However, the driver installs successfully and the mouse works properly.

CAUSE: The pull-up resistors used for the keyboard controller clock and data lines do not meet signal rise time requirements.

RESOLUTION: This Erratum is fixed in version -002 of the PBA by changing the values of two resistor R-blocks and four capacitors on the keyboard/mouse clock and data lines.

ERRATUM:

Norton Utilities (System Info) and CHECKIT (memory scan) will hang the system if any secondary (L2) cache memory is installed.

CAUSE: The VLSI 82C480 chip set has a known bug that prevents the write-protect cacheable option of the segment cachebility registers from working.  This makes it possible for a program to overwrite any of the system BIOS (F000H - FFFFH) that has been cached in L2 memory.

RESOLUTION: System BIOS version 1.00.04.AC0 corrects this Erratum.  The BIOS setup program now allows the user to disable cache, enable cache of system memory only (default), or enable cache of all regions (system memory, video and system BIOS).

ERRATUM:

SCO ODT v2.0 incorrectly displays the warning message "WARNING: CMOS Floppy Count Incorrect" after the system is booted.  The warning is only displayed when two floppy drives are installed in the system.

CAUSE: The system BIOS does not properly update the CMOS data area.

RESOLUTION: System BIOS version 1.00.04.AC0 corrected this Erratum.

ERRATUM:

It is possible to enter the CMOS SETUP program even when the CMOS SETUP jumper on the system board is set to DISABLED.

CAUSE: This is caused by a software bug in the system BIOS.

RESOLUTION: System BIOS version 1.00.04.AC0 corrected this Erratum.

See Also:

Support Information


Classic R-Series Qualified SIMM List
Qualified SIMM List

April, 1994

Listed below are the Single In-Line Memory Module (SIMM) requirements for the Classic R-Series platforms.  Systems will generally work with faster speed SIMMs installed, but will show no performance improvement.  Reliable operation cannot be guaranteed if the SIMM connector contact material does not match that specified for the particular system (for example, a SIMM with gold edge fingers when tin-lead is specified).  BIOS versions 1.00.04.AC0, and later, support both parity (x 36) and non-parity (x 32) SIMM types.  Both memory banks need not contain the same SIMM size or type, however, parity checking is only enabled when parity SIMMs are detected by the BIOS during POST.  Following the table is a list of SIMM vendors qualified by Intel.

Please see the product specific documentation for complete memory configuration and capacity information.

MOTHERBOARD MODEL	SIMM Type speed/mode/connector contacts	Supported  SIMM Sizes
Classic R-Series	70 ns, Fast-Page, Tin-lead (parity) 70 ns, Fast-Page, Tin-lead (no-parity)	512K x 36 1M x 36 2M x 36 4M x 36 512K x 32 1M x 32 2M x 32 4M x 32
The following tables list SIMMs that are known to be compatible with the R-Series 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 Approved and Tested:  The device has been electrically tested by Intel and is known to be compatible with the specified platform(s). In addition, the vendor has met or exceeded Intel's product change, quality control, and availability requirements and is listed on our Approved Manufacturing List.

2. Intel Tested: The device has been electrically tested by Intel across voltage and temperature margins ("four corners") and is known to be compatible with the specified platform(s).

3. Customer Tested: The device has been electrically tested by a customer and is reported to be compatible with the specified platform(s).

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 R-Series tin-leaded SIMM sockets. Mixing dissimilar metal contact types has been shown to result in unreliable memory operation.

Classic R-Series Platforms

1M X 32 (4MB per SIMM)

Tin-lead contacts, 70 ns (no-parity)

Texas Instruments	1	TM124BBK32S-70
Samsung Corning Co.	1	KMM5321000BV-7
Micron Tech.	1	MT8D132M-7
Hyundai	1	HYM53200M-70NT
Fujitsu Ltd.	1	MB85341A-70
PNY Electronics, Inc.	2	32100070-8T	OKI M514400A-70SJ
Centon Electronics, Inc.	3	CE321020AS-70
MGV	3	G0401327H

2M X 32 (8MB per SIMM)

Tin-lead contacts, 70 ns (no-parity)

Micron Tech.	1	MT160232M-7	1.0" SIMM height
Texas Instruments	1	TM248CBK32	1.0" SIMM height
Fujitsu Ltd.	1	MB85342A-70	1.0" SIMM height
Samsung Corning Co.	1	KMM5322000B-7	1.25" SIMM height
PNY Electronics, Inc.	2	32200070-16T	Hitachi HM514400AS7
Centon Electronics, Inc.	3	CE322040AS-70
MGV	3	G0802327L

4M X 32 (16MB per SIMM)

Tin-lead contacts, 70 ns (no-parity)

Texas Istruments	2	TM497BBK32S-70
PNY Electronics, Inc.	2	32400070-32	Hitachi HM514100BS7
Centon Electronics, Inc.	3	CE324020AS-70
MGV	3	G1604327H

512K X 36 (2MB per SIMM)

Tin-lead contacts, 70 ns

Samsung Corning Co.	1	KMM536512C-7
Texas Instruments**	1	TM512LBK36B-70
Toshiba Corp.	1	THM365120AS-70
Micron Tech.	3	MT18D51236M-7
Micron Tech.	3	MT20D51236M-7
Centon Electronics	3	CE51236-LT-7/8

1M X 36 (4MB per SIMM)

Tin-lead contacts, 70 ns

Fujitsu Ltd.	1	MB85346A-70PS
Samsung Corning Co.	1	KMM5361000B-7
Samsung Corning Co.	1	KMM5361003-7
Smart Mod. Tech. Inc	1	SMI5361000-7
Texas Instruments**	1	TM124MBK36A-70
Texas Instruments**	1	TM124MBK36B-70
Texas Instruments**	1	TM124MBK36R-70
Texas Instruments**	1	TM124MBK36T-70
Toshiba Corp.	1	THM361010AS-70
Toshiba Corp.	1	THM361020AS-70
Micron Tech.	3	MT9D136M-7
Samsung Corning Co.	3	KMM5361000B-7
Kelly Micro Systems	2	KMS1000SD36-60
Centon Electronics	3	CE1036LT-7
MGV	3	G0401367
MPM	3	1MX3670T
** Must specify tin-lead contacts at time of order.

2M X 36 (8MB per SIMM)

Tin-lead contacts, 70 ns

Fujitsu Ltd.	1	MB85347A-70PS
Samsung Corning Co.	1	KMM5362000B1-7
Samsung Corning Co.	1	KMM5362000B2-7
Smart Mod. Tech. Inc.	1	SMI5362000-7
Toshiba Corp.	1	THM362040AS-70
Micron Tech.	3	MT18D236M-7
Micron Tech.	3	MT24D236M-7
Kelly Micro Systems	2	KMS2000SD36-60
Samsung Corning Co.	1	KMM5362000B-7
MGV	3	G0802367H
Centon Electronics	3	CE2036LT-7
MPM	3	2MX3670T

4M X 36 (16MB per SIMM)

Tin-lead contacts, 70 ns

Texas Instruments**	2	TM497MBK36Q-70
Samsung Corning Co.	2	KMM5364100A-7
Kelly Micro Systems	2	KMS4000SD36-70
Samsung Corning Co.	3	KMM5364100-07
MGV	3	G1604367H
Centon Electronics	3	CE4036LT-7
MPM	3	4MX3670T
** Must specify tin-lead contacts at time of order.


Additional Information

Dimensions	Environmental Specifications
Safety Certifications	EMI Certifications
Reliability Data	Power Requirements
I/O Map	System Memory
Jumper Settings	System Video Modes
System Interrupts	FLASH BIOS Upgrade
FLASH User Area	Connector & Header Pinouts
Customer Support	Upgrade Parts


DIMENSIONS

System Dimension	Specification

Width	17.2 inches (43.7 cm)

Depth	16.2 inches (41.1 cm)

Height	4.3 inches (11.0 cm) with feet installed

Weight	20.0 lbs (9.1 kg) with floppy installed

Board Dimension	Specification

Length	9.4 inches (23.876 cm)

Width	7.95 inches (20.193 cm)

Height	1.2 inches (3.05 cm) with SIMM installed


ENVIRONMENTAL SPECIFICATIONS

Parameter	Condition	Specification

Temperature	Non-operating	-40 to +70 °C (-40 to 158 °F)

Operating	+10 to +35 °C (50 to 95 °F)

Humidity	Non-operating	92% Relative Humidity max. @ 36 °C

Operating (no hard drive)	80% Relative Humidity max. @ 36 °C

Packaged product	92% Relative Humidity max. @ 40°C

Altitude	Non-operating	50,000 feet (15,240 m)

Operating	10,000 feet (3048 m)

ESD	1.0 kV	No errors

2.5 kV	No errors

5.0 kV	5% soft errors, 0% hard errors, no physical damage

7.5 kV	10% soft errors, 0% hard errors, no physical damage

10.0 kV	25% soft errors, 5% hard errors, no physical damage

12.5 kV	50% soft errors, 10% hard errors, no physical damage

15.0 kV	100% soft errors, 25% hard errors, no physical damage

25.0 kV	100% soft errors, 100% hard errors, no physical damage

Shock	Non-operating	30.0G, 11 ms, 1/2 sine

Accoustical Noise	1 meter, peripherals idle	Less than 40 dB max.


SAFETY CERTIFICATIONS

Underwriters Laboratories (U.S.A.)	UL 1950, 1st Edition 1991	Listed

CSA (Canada)	CSA C22.2 No. 950-M89	Certified

TUV (Rheinland of N.A. - Germany)	EN 60 950-1988 + A1/A2	Certified

IEC 950 (2nd Edition 1991)

NEMKO (Norway) (includes SEMKO,
Sweden, SETI, & Finland certifications)	EN 60 950-1988 + A1/A2	Certified


EMI CERTIFICATIONS

Federal Communications	CFR 47, Parts 2	Certified
Commission (U.S.A.)	and 15 Class B

BZT  (Germany)	CISPR 22, Class B	Registered to Vfg. 243/1991

Dept. of Communications	C.R.C., c. 1374, Class B	Compliant
 (Canada)

VCCI (Japan)	Class 2 I.T.E.	Compliant

VDE (Germany)	VDE 0871 Class B	Tested/compliant

NEMKO (Norwary) (includes	EN 55 022, Class B	Certified
SEMKO, Sweden, SETI, &
FInland certifications)


RELIABILITY DATA

The following Mean-Time-Between-Failures (MTBF) data is calculated from predicted data @ 35 °C.

System:

Classic R-Series i486SX-25 system, 4 MB DRAM memory,
3-1/2 inch floppy disk drive	47,072 hours

Sub-assemblies:

Classic R-Series baseboard (i486 SX-25), 4 MB DRAM memory	96,511 hours

Power Supply (Astec SA 145-3420)	100,000 hours

3-1/2 inch floppy disk drive (Teac FD-235HF-4240)	30,000 hours


POWER REQUIREMENTS

A 145 W switchable power supply powers the R-Series system.

Related Topics:

POWER SUPPLY OUTPUT RATINGS

System Current Drain (+5V)

System Current Drain (-5V, +12V, -12V)


Power Supply Output Ratings

Available	Maximum	Required	Peak
Voltage	Power	Continuous	Min Load	Surge

     +5	12.5	18.0	2.5	18.0

     -5	0.2	0.3	0.0	0.3

  +12	2.8	4.2	0.5	6.0

  -12	0.3	0.3	0.0	0.3

All current values are in Amperes.
Available power is for ISA slots and peripherals in an integrated system.
Peak surge is for a duration of 15 seconds.


System Current Drain (+5V)

Element	Icc Max	Icc Typical

System Board

     Intel486 SX @ 25 MHz	3500	2500

     Intel486 SX @ 33 MHz	3650	2600

     Intel486 DX @ 33 MHz	3850	2800

     Intel486 DX2 @ 66 MHz	4150	3075

i487SX

     @ 25 MHz	950	665

OverDrive Processor

     @ 50 MHz	950	775

     @ 66 MHz	1200	975

Optional 512 KB Video DRAM	32	22

Secondary Cache SRAM

     64 KB	1065	746

     128 KB	720	504

     256 KB	1200	840

SIMM DRAM

     512 Kb x 36 (2 MB)	780	624

    1024 Kb x 36 (4 MB)	1120	896

    2048 Kb x 36 (8 MB)	1150	920

    4096 Kb x 36 (16 MB)	3600	2880

3 1/2-inch Floppy Disk Drive	460	340

NOTES:  All current values are in mA
Typical Icc is used where available and 70% of Icc (max) is used otherwise.  Vcc = 5.25 V.
System board values include 4 MB SIMM (1024 Kb x 36), but no ISA add-in boards.
Current drain values are with no power management installed.

WARNING

The maximum capacity of the power supply and the system board ISA bus connectors must be considered when adding add-in boards.  The system board ISA bus connectors are limited to 3 A per pin maximum.  To avoid damage to the system board or power supply, do not exceed 16.0 A when you add up the total +5 V current drain for the system board, add-in boards, and peripherals.


System Current Drain (-5V, +12V, -12V)

Element	-5 V	 +12 V	-12 V

System Board  (typical)	0.0	0.05	0.05

All current values are in Amperes.


I/O MAP

Address Range	Function

0000 - 000F	DMA #1

0020 - 003F	Interrupt Controller #1

0040 - 0043	Counter/Timer

0060	Keyboard Controller

0061	Port B

0064	Keyboard Controller

0070 - 0071	NMI Enable, Real-Time Clock

0080 - 008F	DMA Page Registers

0092	Port A

00A0 - 00BF	Interrupt Controller #2

00C0 - 00DE	DMA #2

00EC	Configuration Index (VLSI 82C480 and 82C113)

00ED	Configuration Data (VLSI 82C480 and 82C113)

00EE	Fast A20

00EF	Fast Reset

00F0	Coprocessor Busy Clr

00F1	Coprocessor Reset

00F4	Slow CPU

00F5	Fast CPU

00F9	Configuration Protect

00FB	Configuration Unprotect

01F0 - 01F7	IDE (SMC 37C651)

0278 - 027B	Parallel port 2 base address

02F8 - 02FF	Serial port 2 base address

0378 - 037F	Parallel port 1 base address

03BC - 03BF	Parallel port 3 base address

03F0 - 03F7	Floppy disk controller

03F8 - 03FF	Serial port 1 base address

46E8	Video controller

All addresses are hexadecimal


SYSTEM MEMORY

The system board contains two 72-pin SIMM sockets (Figure 1, R, S) defined as Bank 0 and Bank 1.  All configurations of the R-Series System ship with either a 4 MB (1024 Kb ´ 32) or 8 MB (2048 Kb ´ 32) SIMM in Bank 0.

Classic R (All) and Classic R-Plus (i486 SX)

The standard configuration is 4 MB of memory in a single SIMM. The second SIMM socket can accept a 256 K, 512 K, 1 M, 2 M, or 4 M SIMM, for totals of 5, 6, 8, 12 or 20 MB. For configurations of 16 MB or greater than 20 MB, the original 1 M x 32 SIMM must be replaced.

Classic R-Plus (i486 DX and DX2)

The standard configuration is 8 MB of memory in a single 2 M x 32 SIMM. Adding a second SIMM to the i486 DX or DX2 Classic R-Plus can result in totals of  9, 10, 12, 16, and 24 MB.

Both non-parity (x 32) and parity (x 36) SIMM types are supported with BIOS versions 1.00.04.AC0 and later.  If a non-parity is detected in either bank during POST, the BIOS will automatically disable memory parity checking - parity checking is enabled only if all installed SIMMs are parity (x 36) devices.  In addition to mixing parity and non-parity SIMM types, you can also mix different size SIMMs between banks.  For example, Bank 0 could have a 2 MB SIMM and Bank 1 could have a 4 MB SIMM.  All supported SIMMs should be 70 ns fast page-mode DRAM.  Faster devices can be used but will not improve system performance.  The R-Series System can support up to 32 MB of DRAM.

WARNING

The plating on the SIMM pins must be the same type as the plating on the SIMM socket pins.  Failure to match the plating may result in the unreliable operation of the system.  For example, the Classic R-Series uses tin-plated SIMM sockets and must have tin-plated SIMMs installed.

The R-Series system automatically detects installed system memory eliminating the need to set jumpers.

When you install SIMMs, you should first install a SIMM in Bank 0 (socket U56) and then in Banks 1 (socket U57).

By using various combinations of SIMMs you can configure the system memory from 2 MB to 32 MB.

Related Topics:

Approved SIMM List

System Memory Map

Memory Options


System Memory Map

Address Range	Amount	Function

0 to 7FFFF	512 KB	Base memory

80000 to 9FBFF	127 KB	Extended base memory enabled in Setup

9FC00 to 9FFFF	1 KB	Extended BIOS data

A0000 to AFFFF	64 KB	VGA display memory (not available to the ISA bus)

B0000 to B7FFF	32 KB	VGA & mono display memory (not available to the ISA bus)

B8000 to BFFFF	32 KB	VGA display memory (not available to the ISA bus)

C0000 to C7FFF	32 KB	Optional VGA BIOS (enabled via setup; if disabled, available to the ISA bus)

C8000 to DFFFF	96 KB	Available high DOS memory; available to the ISA bus

E0000 to E7FFF	32 KB	Cirrus Logic video BIOS

E8000 to ECFFF	20 KB	Phoenix setup program; available high DOS memory

ED000 to EDFFF	4 KB	User Flash area (available as high DOS memory if no user information is here)

EE000 to EFFFF	8 KB	Flash boot block (available as high DOS memory)

F0000 to FFFFF	64 KB	Reserved for Phoenix BIOS ROM

100000 to FDFFFF	15232 KB	Extended memory

FE0000 to FFFFFF	128 KB	System and video BIOS copy

1000000 to 2800000	20480 KB	Extended memory

All addresses are hexadecimal


Memory Options

Total Memory	Bank 0 SIMM Type	Bank 1 SIMM Type

2 MB	512 Kb x 32/36	-

4 MB	512 Kb x 32/36	512 Kb x 32/36

6 MB	512 Kb x 32/36	1024 Kb x 32/36

10 MB	512 Kb x 32/36	2048 Kb x 32/36

18 MB	512 Kb x 32/36	4096 Kb x 32/36

4 MB	1024 Kb x 32/36	-

6 MB	1024 Kb x 32/36	512 Kb x 32/36

8 MB	1024 Kb x 32/36	1024 Kb x 32/36

12 MB	1024 Kb x 32/36	2048 Kb x 32/36

20 MB	1024 Kb x 32/36	4096 Kb x 32/36

8 MB	2048 Kb x 32/36	-

10 MB	2048 Kb x 32/36	512 Kb x 32/36

12 MB	2048 Kb x 32/36	1024 Kb x 32/36

16 MB	2048 Kb x 32/36	2048 Kb x 32/36

24 MB	2048 Kb x 32/36	4096 Kb x 32/36

16 MB	4096 Kb x 32/36	-

18 MB	4096 Kb x 32/36	512 Kb x 32/36

20 MB	4096 Kb x 32/36	1024 Kb x 32/36

24 MB	4096 Kb x 32/36	2048 Kb x 32/36

32 MB	4096 Kb x 32/36	4096 Kb x 32/36


JUMPER SETTINGS
SYSTEM JUMPER SETTINGS

Note: Table cross-references are found in Chapter 5 of the R-Series system Product Guide.

Jumper Block	Function	Factory Default Setting

J11	Secondary Cache Memory	256 KB, 1-2, 3-4, 7-8 (see Table 5-5)

J12	FLASH Enable	1-2  (see Table 5-6)

J13	FLASH Boot Source	1-2  (see Table 5-6)

J16	Onboard Video	1-2  (see Table 5-11)

J17	Floppy Write Protect	2-3  (see Table 5-9)

J18	CPU Speed	Factory set to model shipped

25 MHz, 1-2

33 MHz, 1-2 (see Table 5-1)

J19	CPU Speed	Factory set to model shipped

25 MHz, 1-2

33 MHz, 2-3 (see Table 5-1)

J20	Password Enable	2-3  (see Table 5-8)

J21	Setup Protection	1-2 (see Table 5-10)

J22	Upgrade Processor Type	Intel486 SX, 1-2 (PGA)

Intel486 SX (PQFP), 2-3

Intel486 DX, 2-3

Intel486 DX2, 2-3

Intel487 SX, 2-3

All OverDrive Processors, 2-3
J23	Upgrade Processor Type	Intel486 SX (PGA), 2-3

Intel 486 SX (PQFP), 1-2

Intel486 DX, 1-2

Intel486 DX2, 1-2

Intel487 SX, 1-2

ALL OverDrive Processors, 1-2
J24	Upgrade Processor Type	Intel486 SX (PGA), 2-3

Intel486 SX (PQFP), 1-2

Intel486 DX, 1-2

Intel486 DX2, 1-2

Intel 487 SX, 1-2

All OverDrive Processors, 1-2
J25	Upgrade Processor Type	Intel486 SX (PGA), 2-3

Intel 486 SX (PQFP), 1-2

Intel486 DX, 1-2

Intel486 DX2, 1-2

Intel487 SX, 1-2

All OverDrive Processors, 1-2
J28	Clear CMOS	In (see Table 5-7)


SYSTEM INTERRUPTS

Interrupt Request	System Resource

NMI	Parity Error

0	Reserved, Interval Timer

1	Reserved, Keyboard buffer full

2	Reserved, Cascade interrupt from slave PIC

3	Onboard Serial Port 2

4	Onboard Serial Port 1

5	User available

6	Onboard Floppy controller

7	Onboard Parallel Port

8	Real-time Clock

9	User available (reserved on PBA revision levels -005, and later)

10	User available

11	User available

12	Onboard Mouse Port if enabled, else user available

13	Reserved, Math coprocessor

14	Onboard IDE hard disk controller

15	User available


SYSTEM VIDEO MODES

CMOS Setup
Mode No.	Monitor	Horizontal	Display
Freq (kHz)	Examples	Freq (kHz)	Vertical Freq (Hz)	Resolutions

 31.5	IBM 8503, 8512,	31.5	60 or 72	640 x 480
8513

 31.5 & 35.5	IBM 8514, 8515	31.5	60 or 72	640 x 480
35.5	43.5 interlaced	1024 x 768

 31.5 - 35.2	NEC 2A	31.5	60 or 72	640 x 480
35.2	56	800 x 600
43.5 interlaced	1024 x 768

 31.5 - 35.5	NEC II	31.5	60 or 72	640 x 480
35.2	56	800 x 600
35.5	43.5 interlaced	1024 x 768

 31.5 - 37.8	NEC 3D	31.5	60 or 72	640 x 480
37.8	60	800 x 600
37.8	43.5 interlaced	1024 x 768

 31.5 - 48	Sony CPD-1304	31.5	60 or 72	640 x 480
NEC 3FGX, Nanao	48.0	72	800 x 600
9065S, 9070U	48.0	60 non-interlaced	1024 x 768
48.0	43.5 interlaced	1280 x 1024

31.5 - 56	NEC 4D, 4FG,	31.5	60 or 72	640 x 480
Nanao T240i	48.0	72	800 x 600
56.0	70 non-interlaced	1024 x 768
48.0	43.5 interlaced	1280 x 1024

31.5 - 64	NEC 5D, 5FG, 6FG	31.5	60 or 72	640 x 480
Nanao T550i, T560	48.0	72	800 x 600
T560i, T660i, F550	58.3	72 non-interlaced	1024 x 768
F750i	48.0	43.5 interlaced	1280 x 1024


FLASH BIOS UPGRADE

The R-Series system incorporates system and video BIOS in a FLASH EPROM.  This allows the BIOS to be easily upgraded without the necessity of replacing the BIOS EPROM.  Subsequent upgrades can be easily done from a floppy disk, hard disk, or over a network with a simple utility.

The DOS-based upgrade utility has three options for BIOS upgrades: (1) the capability to update the FLASH BIOS with a file on disk, (2) copies the current BIOS code from the FLASH to a disk file to allow the user a backup should a situation occurs that prevents the upgrade from being completed, (3) compares the FLASH BIOS to a disk file to verify they are identical, thus ensuring that the system has the correct BIOS version.

The following table shows the jumper pin settings for the FLASH Write and FLASH Boot Block jumpers J12 and J13.  (Jumper J12 is only used when you wish to prevent FLASH from being upgraded.)

Related Topics:

FLASH Jumper Settings

FLASH Memory Addresses

FLASH BIOS Recovery


FLASH Jumper Settings

Jumper	Setting	Action

J12	1-2†	Enable programming of the FLASH part

2-3	Disable programming of the FLASH part

J13	1-2†	Normal FLASH operation

2-3	Invoke boot block recovery

    † Default Setting

Contact your service representative for information on obtaining the latest FLASH BIOS release.  This will normally be supplied on a bootable floppy disk with menu-driven utilities for installation.  Follow the directions of the menu program.

The Intel 28F001BXT 1 Mb FLASH component is organized as 128Kb x 8 (128KB).  The FLASH device is divided into five addressable areas.


FLASH Memory Addresses

System Address	FLASH Memory Area

E000 to EBFFF	48KB BIOS extensions (system and video)

EC000 to ECFFF	4KB Parameter block (BIOS only)

ED000 to EDFFF	4KB Parameter block (Reserved)

EE000 to EFFFF	8KB Boot block (not FLASH eraseable)

F0000 to FFFFF	64KB main BIOS

All addresses are in hexadecimal

The FLASH device resides in system memory in two 64K segments starting at E0000H, and is distributed in two different organizations, depending on the mode of operation.  In Normal mode, address line A16 is inverted, switching the E0000H and F0000H segments so that the BIOS is organized as shown in the previous table.  Recovery mode will only be necessary in the unlikely event that the BIOS upgrade procedure is interrupted which may cause the BIOS area to be left in an unusable state.


FLASH BIOS Recovery

In the unlikely event that the FLASH upgrade is interrupted catastrophically, it is possible the BIOS can be left in an unusable state.  Recovering from this condition requires the following steps to be performed.

CAUTION

Ensure that no BIOS calls will be made while the FLASH memory is being updated.  If a call does occur, the BIOS update will be corrupted requiring the procedure to be performed a second time.

1.	Change jumper for J13 to pins 2-3 and verify that jumper J12 is set to 1-2.

1.	Install bootable upgrade floppy disk into drive A.

2.	Reboot the system.

3.	Because of the small amount of code available in the non-erasable boot block area, no video is available to direct the procedure.  The procedure can be monitored by listening to the speaker and looking at the floppy drive LED.  The system will sound one long beep and the drive LED will light, indicating that the system is copying the recovery code into the FLASH device.  As soon as the system sounds two short beeps and the drive LED goes off, the system can be turned off.

4.	Reset the jumper on J13 to pins 1-2.

5.	Leave the bootable upgrade floppy disk in drive A and re-apply power to the system.

6.	Continue with the original upgrade.

Note:

The boot block BIOS was updated in July 1993 to correct a system hang condition that occurred when performing a FLASH recovery sequence using a DOS 6.0 recovery boot diskette.  Systems that contain the previous version of boot block BIOS can be identified by a part number of 615026-001 (or lower) on the FLASH device located at location U16 on the system board.  FLASH devices containing the version of boot block BIOS that fixes the recovery hang problem have a part number of 615402-001 (or higher).  Note that any recovery boot diskette formatted with a DOS version lower than 6.0 works properly with any version of the boot block BIOS.


FLASH USER AREA

The R-Series system supports a 4 KB programmable FLASH User area located at ED00-EDFF.  A programmer may user this area to display a customized message to to execute a small program.  The BIOS accesses the user area just after POST has completed.  The FLASH user area may be updated by running the FMUP.EXE utility, which expects the update files to have a *.USR extension.  Sample programs and instructions are in the file CLSUSER.ZIP on the iPAN bulletin board.


CONNECTOR AND HEADER PINOUTS

VGA Video Connector (J1)

Parallel Connector (J2)

Serial Connectors (J4-COM1, J3-COM2)

Keyboard And Mouse Connectors (J5-Mouse, J6-Keyboard)

Power Connectors (J8, J9)

IDE Hard Disk Drive Header (J14)

Floppy Disk Drive Header (J15)

ISA Riser Card Connector

External Speaker Header (J33)

+12 V Auxiliary Fan Header (J32)

System Reset Header (J31)

Keylock/Power LED Header

Hard Disk Drive LED Header (J29)

+5 V Auxiliary Fan Header (J26)

VESA-Compliant 8514/A Standard Feature Header (J10)


VGA Video Connector

The VGA video output is connector J1.

Pin Number	Signal Name	Pin Number	Signal Name

1	Red	9	No connection

2	Green	10	Ground

3	Blue	11	No connection

4	No connection	12	No connection

5 	Ground	13	Horizontal sync

6	Ground	14	Vertical sync

7 	Ground	15	No connection

8	Ground


Parallel Connector

The parallel port (LPT1) is connector J2.

Pin Number	Signal Name	Direction

1	Strobe*	Output

2	Data bit 0	Bidirectional

3	Data bit 1	Bidirectional

4	Data bit 2	Bidirectional

5	Data bit 3	Bidirectional

6	Data bit 4	Bidirectional

7	Data bit 5	Bidirectional

8	Data bit 6	Bidirectional

9	Data bit 7	Bidirectional

10	ACK*	Input

11	BUSY	Input

12	Paper end	Input

13	SLCT 	Input

14	Auto feed XT	Output

15	ERROR*	Input

16	INIT*	Output

17	SLCT IN	Output

18 - 25	Ground	-


Serial Connectors

Serial Port 1 (COM1) is J4 and Serial Port 2 (COM2) is J3.

Pin Number	Signal Name

1	DCD* (Data carrier detect)

2	SIN (Serial Input)

3	SOUT (Serial Output)

4	DTR* (Data terminal ready)

5	Ground

6	DSR* (Data set ready)

7	RTS* (Request to send)

8	CTS* (Clear to send)

9	RI* (Ring indicator)

* = Active low signal


Keyboard And Mouse Connectors

The system board illustration shows the location of  the keyboard and mouse (PS/2 style) connectors J6 and J5 respectively.  The +5 V line on these connectors is protected with a PolySwitch® circuit which acts like a fuse except that it re-establishes the connection after an over-current condition has been removed.  This feature eliminates the need for a fuse but care must still be taken to turn the system power off before connecting or disconnecting a keyboard or mouse connector.

Pin Number	Signal Name

1	Data

2	No Connection

3	Ground

4	+5 V dc (Vcc)

5	Clock

6	No connection


Power Connectors

The system board illustration shows the location of the system board power connectors J8 and J9.  The maximum power dissipation allowed by the power supply is 120 Watts.

Pin Number	Signal Name	Pin Number	Signal Name

J8-1	Power good	J9-1	Ground

J8-2	+5 V dc (Vcc)	J9-2	Ground

J8-3	+12 V dc	J9-3	-5 V dc

J8-4	-12 V dc	J9-4	+5 V dc (Vcc)

J8-5	Ground	J9-5	+5 V dc (Vcc)

J8-6	Ground	J9-6	+5 V dc (Vcc)


IDE Hard Disk Drive Header

The system board illustration shows the location of the IDE hard disk drive header J14.

Pin Number	Signal Name	Pin Number	Signal Name

1	Reset IDE	2	Ground

3	Host Data 7	4	Host Data 8

5	Host Data 6	6	Host Data 9

7	Host Data 5	8	Host Data 10

9	Host Data 4	10	Host Data 11

11	Host Data 3	12	Host Data 12

13	Host Data 2	14	Host Data 13

15	Host Data 1	16	Host Data 14

17	Host Data 0	18	Host Data 15

19	Ground	20	Key

21	IOCHRDY	22	Ground

23	I/O Write	24	Ground

25	I/O Read	26	Ground

27	IOCHRDY	28	BALE

29	Reserved	30	Ground

31	IRQ 14	32	IOCS 16

33	Addr 1	34	Ground

35	Addr 0	36	Addr 2

37	Chip Select 0	38	Chip Select 1

39	Activity 	40	Ground


Floppy Disk Drive Header

The system board illustration shows the location of the floppy disk drive connector J15.

Pin Number	Signal Name	Pin Number	Signal Name

1	Ground	2	Reduced Write*

3	Ground	4	Reserved

5	Key	6	Reserved

7	Ground	8	Index

9	Ground	10	Master Enable A

11	Ground	12	Drive Select B

13	Ground	14	Drive Select A

15	Ground	16	Motor Enable B

17	Ground	18	DIR

19	Ground	20	STEP

21	Ground	22	Write Data

23	Ground	24	Write Gate

25	Ground	26	Track 00

27	Ground	28	Write Protect

29	Ground	30	Read Data

31	Ground	32	Side 1 Select

33	Ground	34	Diskette Change

* = Active low signal


ISA Riser Card Connector

The system board illustration shows the location of the ISA riser card connector J7.

Pin Number	Signal Name	Pin Number	Signal Name

A1	+12 V	B1	+12 V

A2	Ground	B2	+5 V (Vcc)

A3	Ground	B3	Ground

A4	IOCHK*	B4	Ground

A5	SD (7)	B5	RST ISA

A6	SD (6)	B6	+5 V (Vcc)

A7	SD (5)	B7	IRQ (9)

A8	SD (4)	B8	-5 V

A9	SD (3)	B9	IRQ (2)

A10	SD (2)	B10	-12 V

A11	SD (1)	B11	0WS

A12	SD (0)	B12	+12 V

A13	IOCHRDY	B13	Ground

A14	AEN	B14	SMEMW*

A15	SA (19)	B15	SMEMR*

A16	SA (18)	B16	IOW*

A17	SA (17)	B17	IOR*

A18	SA (16)	B18	DACK (3)

A19	SA (15)	B19	DRQ (3)

A20	SA (14)	B20	DACK (1)

A21	SA (13)	B21	DRQ (1)

A22	SA (12)	B22	REF*

A23	SA (11)	B23	SYSCLK

A24	SA (10)	B24	IRQ (7)

A25	SA (9)	B25	IRQ (6)

A26	SA (8)	B26	IRQ (5)

A27	SA (7)	B27	IRQ (4)

A28	SA (6)	B28	IRQ (3)

A29	SA (5)	B29	DACK (2)

A30	SA (4)	B30	T / C

A31	SA (3)	B31	BALE

A32	SA (2)	B32	+5 V (Vcc)

A33	SA (1)	B33	OSC14

A34	SA (0)	B34	Ground

A35	Ground	B35	Ground

A36	Ground	B36	+5 V (Vcc)

A37	+5 V (Vcc)	B37	+5 V (Vcc)

A38	SBHE	B38	MEMCS16*

A39	LA (23)	B39	IOCS16*

A40	LA (22)	B40	IRQ (10)

A41	LA (21)	B41	IRQ (11)

A42	LA (20)	B42	IRQ (12)

A43	LA (19)	B43	IRQ (15)

A44	LA (18)	B44	IRQ (14)

A45	LA (17)	B45	DACK (0)

A46	MEMR*	B46	DRQ (0)

A47	MEMW*	B47	DACK (5)

A48	SD (8)	B48	DRQ (5)

A49	SD (9)	B49	DACK (6)

A50	SD (10)	B50	DRQ (6)

A51	SD (11)	B51	DACK (7)

A52	SD (12)	B52	DRQ (7)

A53	SD (13)	B53	+5 V (Vcc)

A54	SD (14)	B54	MASTER

A55	SD (15)	B55	Ground

A56	Ground	B56	Ground

A57	Ground	B57	Ground

A58	Ground	B58	+5 V (Vcc)

A59	+5 V (Vcc)	B59	+5 V (Vcc)

A60	+5 V (Vcc)	B60	+5 V (Vcc)

* = Active low signal


External Speaker Header

The system board illustration shows the location of  the external speaker header J33.

Pin Number	Signal Name

1	SPK3

2	Key

3	SPK4

4	+5 V


+12 V Auxiliary Fan Header

The system board illustration shows the location of  the +12 V auxiliary fan power header (not used) J32.

Pin Number	Signal Name

1	Ground

2	+12 V

3	Ground


System Reset Header

The system board illustration shows the location of the system reset header (not used) J31.

Pin Number	Signal Name

1	RESET

2	Ground


Keylock/Power LED Header

The system board illustration shows the location of the keylock/power LED header J30.  Note that support for the keyboard lock feature was removed in BIOS versions 1.00.04.AC0, and later, since this feature is not supported by the VLSI 82C113 keyboard controller.

Pin Number	Signal Name

1	LED power

2	Key

3	Ground

4	KEYLOCK*

5	Ground


Hard Disk Drive LED Header

The system board illustration shows the location of the hard disk drive LED header J29.

Pin Number	Signal Name

1	LED power (+ 5 V)

2	HD_ACTIVE*

3	Key

4	Ground


+5 V Auxiliary Fan Header

The system board illustration shows the location of  the +5 V auxiliary fan header (not used) J26.

Pin Number	Signal Name

1	+ 5 V

2	Key

3	Ground

4	Ground


VESA-Compliant 8514/A Standard Feature Header

The system board illustration shows the location of the VESA-compliant 8514/A standard feature header J10.

Pin Number	Signal Signal	Pin Number	Signal Name

1	Ground	2	Pixel Data 0

3	Ground	4	Pixel Data 1

5	Ground	6	Pixel Data 2

7	Enable External Pixel Data	8	Pixel Data 3

9	Enable External Sync	10	Pixel Data 4

11	Enable External Pixel Clock	12	Pixel Data 5

13	No Connection	14	Pixel Data 6

15	Ground	16	Pixel Data 7

17	Ground	18	Pixel Clock

19	Ground	20	Blanking

21	Ground	22	Horizontal Sync

23	No Connection	24	Vertical Sync

25	Key	26	Ground


CUSTOMER SUPPORT

The R-Series system is backed by Intel's industry-leading support groups in the OEM Products and Services Division (OPSD), including IntelTechDirectä. OPSD can support many of your network integration and service needs, including worldwide integration and system repair services. IntelTechDirect provides the following 4 major services:

iPAN (INTEL PRODUCT ASSISTANCE NETWORK)

An electronic Bulletin board with current product information, demo software and more...

- Available worldwide through direct-dial at 916-356-3600

- Modem speeds up to 14.4k baud with standard software

- FLASH BIOS upgrade files

- Modem set at no parity, 8 data bits, 1 stop bit

iPUB (INTEL PRODUCT UPDATE BULLETIN)

- Monthly Product updates available 24 hours a day from iPAN

- Official notification of engineering changes and technical data

- Easy information retrieval using Windows Help file format

- Intel platform system, board, and BIOS revision histories

- Hardware and software compatibility notes

- Documentation updates, spare parts and order information

iPALS (INTEL PHONE ACTION LINE SUPPORT)

A direct telephone support line backed by highly qualified and well trained technical personnel.

- Toll-free access to Intel support engineers for problem resolution (1-800-628-8686)

- Responses within 24 hours Monday-Friday

- Expert assistance geared to the secial needs of OEMs and VARs

FAXBACK™

- Product descriptions and technical data sent to any fax machine from a touchtone phone

- Information on End-of-Life products

- Available worldwide through direct dial at 916-356-3105 or toll free in the U.S. at 1-800-628-2283

For information about IntelTechDirect please contact your local Intel Sales Representative.


Classic R-Series Upgrade Parts
Upgrade Parts

Cache SRAM

The Classic R-Series can be upgraded with a second level cache by adding industry-standard SRAM components to DIP sockets on the baseboard. Possible combinations are listed in the following table. The design requires 15 ns or 20 ns DATA SRAM components and 12 ns TAG bit SRAM. A jumper change may also be required.

	SRAM Size
Cache Size	Bank 0  U23,U26,U29,U35	Bank 1 U10,U14,U15,U20	Tag Bit U40
64 K	(4) 8Kb x 8	(4) 8Kb x 8	(1) 8Kb x 8
128K	(4) 32Kb x 8	none	(1) 32Kb x 8
256K	(4) 32Kb x 8	(4) 32Kb x 8	(1) 32Kb x 8
The following cache SRAM vendors and part numbers have been approved by Intel for use in the Classic R-Series.

8K x 8, 12 ns (TAG)	8K x 8, 15/20 ns (DATA)
MOTOROLA		MCM6264CP15
CYPRESS		CY7C185-15PC
IDT	71B64S12TP	7164S15TP
SAMSUNG		KM68685BP-15
32K x 8, 12 ns (TAG)	32K x 8, 15/20 ns (DATA)
AT&T	ATT7C199-P12
ALLIANCE SEMI.			AS7C256-20PC
CYPRESS	CY7C199-12PC	CY7C199-15PC	CY7C199-20PC
HYUNDAI	HY658256S-12	HY658256S-15
IDT	IDT71256SA12TP	71256SA15TP	71256SA20TP
MICRON TECH.		MT5C2568-15	MT5C2568-20
MOTOROLA		MCM6206CP-15	MCM6206DP-20
PARADIGM	PDM41256SA12P	PDM41256A15P	PDM41256A20P
SAMSUNG		KM68257BP-15	KM68257BP-20
TOSHIBA	TC55B328P-12	TC55328AP-15
WINBOND ELEC.		WY24257AK-15	WY24257AK-20

Video DRAM

The Classic R-Series systems can be upgraded to 1 MB of video DRAM by installing four 70 ns 256 K x 4 page mode DIP DRAM components into socket locations U22, U25, U28, and U34. Classic R-Series Plus systems ship with 1 MB of video DRAM as standard.  The following table lists several vendors and their part numbers.

Vendor	Part Number
Texas Instruments	TMS44C256-70N
Hyundai	HY534256ALJ-60
Hyundai	HY534256ALJ-70
Mosel/Vitelic	V53C104F-60
Mosel/Vitelic	V53C104F-70
Sanyo	LC324256BP-70
Siemens	HYB514256B-70
Toshiba	TC514256AP-70
NEC	uPD424256

i487TMSX/OverDriveTM

Both of these upgrade components are available from Intel's Personal Computer Enhancement Division.  To obtain the location of the nearest Intel dealer contact 1 (800) 538-3373.

See Also:

Optional Cache

Processor Upgrades

Video Subsystem