Copyright: ® Intel Corporation


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Contents

System Specifications

DIMENSIONS

ENVIRONMENTAL SPECIFICATIONS

POWER REQUIREMENTS

System Characteristics

I/O MAP

SYSTEM MEMORY

SYSTEM JUMPER SETTINGS

SYSTEM INTERRUPTS

SYSTEM VIDEO MODES

FLASH BIOS UPGRADE

Pinouts

CONNECTOR AND HEADER LOCATIONS


DIMENSIONS

Dimension	Specification

Width	17.2 inches (43.7 cm)

Depth	16.2 inches (41.1 cm)

Height	4.3 inches (11.0 cm)

Weight	20.0 lb (9.1 kg) without peripherals


ENVIRONMENTAL SPECIFICATIONS

Parameter	Specification

Operating temperature	10 to 35 °C (50 to 95 °F)

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

Operating humidity  (no hard disk drive)	20% to 80% at 35 °C (95 °F)

Non-operating humidity	95% at 35 °C (95 °F)

Operating altitude	to 10,000 ft (3048 m)

Non-operating altitude	to 50,000 ft (15,240 m)

Maximum idle noise	40 dB (peripherals idle, at 1 m)

ac power	90 to 132 V ac, 47 to 63 Hz

180 to 264 V ac, 47 to 63 Hz

Shock (non-operating)	30.0 G, 11 ms, 1/2 sine


POWER REQUIREMENTS

A 120 W switchable power supply powers the S-Series system.

Related Topics:

Power Supply Output Ratings

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

System Current Drain (+5V)


Power Supply Output Ratings

Available	Maximum	Required	Peak
Voltage	Power	Continuous	Min Load	Surge

     +5	12.5	16.0	2.5	18.0

     -5	0.2	0.2	0.0	0.3

  +12	2.8	3.0	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, +12V, -12V)

Element	-5 V	 +12 V	-12 V

System Board  (typical)	0.0	0.7	0.7

3 1/2-inch Floppy  Disk Drive

          Maximum	0	0.3	0

          Nominal	0	0.01	0

All current values are in Amperes.


System Current Drain (+5V)

Element	Icc Max	Icc Typical

System Board

     Intel 486 SX @ 20/25 MHz	4260	2900

     Intel486 DX @ 33 MHz	4600	3200

     Intel486 DX2 @ 66 MHz	4900	3475

i487SX

     @ 20 MHz	775	542

     @ 25 MHz	950	665

OverDrive Processor

     @ 25 MHz	950	775

     @ 33 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

     2 Mb x 36 (8 MB)	2240	1568

    1 Mb x 36 (4 MB)	1120	784

    4 Mb x 9 (4 MB)	900	630

    1 Mb x 9 (1 MB)	280	196

    256 Kb x 9 (256 KB)	210	147

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 (1 Mb x 36), but no ISA add-in boards.

WARNING

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.


I/O MAP

Address Range	Function

022	Index for OPTi chip set

024	Data for OPTi chip set

061	AT-compatible configuration port

078	System configuration port

079	B.I.T. (BIOS independent timer)

07A	Bidirectional parallel port configuration

1F0 - 1F7	IDE (87310)

278 - 27F	Parallel port 2

2F8 - 2FF	Serial port 2

378 - 37F	Parallel port 1

3B0 - 3DF	Video controller

3F0 - 3F7	Floppy disk controller

3F3	Configuration port for 87310 (write only)

3F8 - 3FF	Serial port 1

46E8	Video controller

All addresses are hexadecimal


SYSTEM MEMORY

The system board contains a single 36-bit SIMM socket defined as Bank A, and eight 9-bit sockets defined as Banks B and C.  All configurations of the S-Series system ship with a 4 MB (1024 Kb x 36) SIMM in Bank A with none of the sockets in Banks B and C populated.  The 4 MB 36-bit SIMM can be replaced by a 2 MB (512 Kb x 36) SIMM or an 8 MB (2048 Kb x 36) SIMM.  (The Bank A SIMM can be removed and not replaced if SIMMs are installed in Bank B and/or C.)  Bank A SIMMs can be single- or double-sided.

The eight 9-bit sockets are grouped into two banks; B and C.  Bank B contains four sockets (U75, U76, U78, U79).  Bank C contains four sockets (U82, U83, U87, U88).  These sockets can be populated with 256 KB (256 Kb x 9), 1 MB (1024 Kb x 9), or 4 MB (4096 Kb x 9) SIMMs.  Bank B and C SIMMs can only be single-sided, and all four sockets of a bank must be populated for the system to operate properly.

You can mix SIMM types between banks but not within a bank.  For example, Bank B could have 1 MB SIMMs and Bank C could have 4 MB SIMMs.  All supported SIMMs should be 80 ns fast page-mode DRAM.  Faster devices can be used but will not improve system performance.  The S-Series system can support up to 40 MB of DRAM.

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

When you install SIMMs in Banks B and C, you should begin with Bank B in  socket U75.

By using various combinations of SIMMs you can configure the system memory from 1 MB to 40 MB.

Related Topics:

System Memory Allocation

Memory Options


System Memory Allocation

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	Western Digital 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 A SIMMs	Bank B SIMMs	Bank C SIMMs

2 MB	512 Kb x 36	-	-

6 MB	512 Kb x 36	1 Mb x 9	-

10 MB	512 Kb x 36	1 Mb x 9	1 Mb x 9

18 MB	512 Kb x 36	4 Mb x 9	-

22 MB	512 Kb x 36	4 Mb x 9	1 Mb x 9

34 MB	512 Kb x 36	4 Mb x 9	4 Mb x 9

4 MB	1 Mb x 36	-	-

8 MB	1 Mb x 36	1 Mb x 9	-

12 MB	1 Mb x 36	1 Mb x 9	1 Mb x 9

20 MB	1 Mb x 36	4 Mb x 9	-

24 MB	1 Mb x 36	4 Mb x 9	1 Mb x 9

36 MB	1 Mb x 36	4 Mb x 9	4 Mb x 9

8 MB	2 Mb x 36	-	-

12 MB	2 Mb x 36	1 Mb x 9

16 MB	2 Mb x 36	1 Mb x 9	1 Mb x 9

24 MB	2 Mb x 36	4 Mb x 9	-

28 MB	2 Mb x 36	4 Mb x 9	1 Mb x 9

40 MB	2 Mb x 36	4 Mb x 9	4 Mb x 9

1 Mb	-	256 Kb x 9	-

2 MB	-	256 Kb x 9	256 Kb x 9

4 MB	-	1 Mb x 9	-

5 MB	-	1 Mb x 9	256 Kb x 9

8 MB	-	1 Mb x 9	1 Mb x 9

16 MB	-	4 Mb x 9	-

17 MB	-	4 Mb x 9	256 Kb x 9

20 MB	-	4 Mb x 9	1 Mb x 9

32 MB	-	4 Mb x 9	4 Mb x 9

One SIMM is installed  in Bank A.  Four SIMMs are installed in Banks B and C.


SYSTEM JUMPER SETTINGS

Note

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

Jumper Block	Function	Factory Default Setting

J9	Battery Type (rd/offboard)	1-2 (see Table 5-7)

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

J14	FLASH Enable	2-3  (see Table 5-5)

J16	Secondary Cache Memory	None installed (see Table 5-4)

J19	CPU Configuration	i486SX processors, 1-3, 2-4;

i486DX processors, 3-5, 4-6.

i486DX2 processors, 3-5, 4-6

(factory set only)

J20	Clear CMOS	In (see Table 5-6)

J26	CPU Speed	Factory set to model shipped

 	20 MHz, 2-3

25 MHz, 1-2

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

J27	CPU Speed	Factory set to model shipped

20 MHz, 1-2

25 MHz, 2-3

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

J28	Onboard Video	2-3  (see Table 5-11)

J29	Password Enable	2-3  (see Table 5-9)

J30	Floppy Write Protect	2-3  (see Table 5-10)

J31	Super I/O Controller	2-3  (factory set only)


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

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

Mode No.	Resolution	Colors	Fonts (4)	Clock (5)	Vertical Refresh

 21/54H	132 x 43 (1)	16	9 x 9	44.9

   41H	80 x 34 (1)	16	9 x 9	44.9

   47H	132 x 28 (1)	16	8 x 16	44.9

   55H	132 x 25 (1)	16	8 x 16	44.9

   56H	132 x 43 (1)	4 (3)	9 x 9	44.9

   57H	132 x 25 (1)	4 (3)	8 x 16	44.9

 58/6AH	800 x 600 (2)	16	8 x 8	36	56 Hz

40	60 Hz

50	72 Hz

  5AH	1024 x 768 (2)	2	8 x 16	44.9	Int @ 44/88 Hz

65	Non-int @ 60 Hz

75	INon-Int @ 70 Hz

Non-Int @ 72 Hz

  5CH	800 x 600 (2)	256	8 x 8	36	56 Hz

40	60 Hz

50	72 Hz

  5DH	1024 x 768 (2)	16	8 x 16	44.9	Int @ 44/88 Hz

65	Non-int @ 60 Hz

75	Non-Int @ 70 Hz

Non-Int @ 72 Hz

(1) = cols x rows;  (2) = pixels x pixels;  (3) = Mono; (4) = pixels; (5) = MHz


FLASH BIOS UPGRADE

The S-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 J13 and J14.  (Jumper J13 is only used when you wish to prevent FLASH from being upgraded.)

Related Topics:

FLASH Jumper Settings

FLASH Memory Addresses

FLASH BIOS Recovery

Programming The VGA Extended Modes


FLASH Jumper Settings

Jumper	Setting	Action

J13	1-2†	Enable +12V to FLASH (erasable)

2-3	Disable +12V to FLASH

J14	1-2	Boot from boot block

2-3†	Boot from standard BIOS

    † 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 J14 to pins 1-2.

2.	Install bootable upgrade floppy disk into drive A.

3.	Reboot the system.

4.	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.

5.	Reset the jumper on J14 to pins 2-3.

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

7.	Continue with the original upgrade.


Programming The VGA Extended Modes

The extended video modes of the Western Digital 90C31 super VGA controller can be set by either the standard SETMODE BIOS call or the SET SPECIAL MODE BIOS call.  Additional support is provided for setting and locking non-VGA modes and reading and writing the controller registers via the EXTENDED FUNCTIONS Setmode BIOS call.  All of the extended functions are supported by the BIOS with the following exceptions: read/write dot and and read char are not supported in 1024 x 768 modes.

The extended 800 x 600 graphics modes (hex 58, 59) and 1024 x 768 graphics modes (hex 5A, 5B, 5D) require a multifrequency monitor.  No checking is performed by the BIOS or hardware to verify if such a monitor is connected.  These modes are available independently of the setting of the multifrequency monitor special timing switch (switch lever 1).

Setmode (BIOS call AH=00) has been extended as follows:

AH = 00H	SETMODE

AL = extended video mode.  This call will set the
extended super VGA controller video modes:

54H, 55H, 56H, 57H, 58H, 59H

AX = 007F	EXTENDED FUNCTIONS

This call supports the following functions:

BH = 00	SET VGA OPERATION

BH = 01	SET NON-VGA OPERATION
The controller must be set a valid code for non-
VGA operation.  Color modes (0, 1, 2, 3, 4,
5, 6) will set non-VGA CGA  operation.
Monochrome mode 7 will set non-VGA MDA/
Hercules operation.

BH = 02	QUERY MODE STATUS
Upon exit, the following data is returned:
BL  = 0 if operating in VGA mode
BL  = 1 if operating in non-VGA mode
CH  = total video RAM size in 64K units
CL  = video RAM used by the current mode

BH = 03	LOCKS CURRENT MODE
Allows current mode (VGA or non-VGA)
to survive reboot.

The following are the super VGA controller extended function calls:

BH = 09	WRITE CONTROLLER REGISTER 0A (3CE index 9)
BL = Value to set in controller register

BH = 0A	WRITE CONTROLLER REGISTER 0B (3CE index A)
BL = Value to set in controller register

BH = 0B	WRITE CONTROLLER REGISTER 1 (3CE index B)
BL = Value to set in controller register

BH = 0C	WRITE CONTROLLER REGISTER 2 (3CE index C)
BL = Value to set in controller register

BH = 0D	WRITE CONTROLLER REGISTER 3 (3CE index D)
BL = Value to set in controller register

BH = 0E	WRITE CONTROLLER REGISTER 4 (3CE index E)
BL = Value to set in controller register

BH = 19	READ CONTROLLER REGISTER 0A (3CE index 9)
Upon exit, the following data is returned:
BL = Value of the controller register

BH = 1A	READ CONTROLLER REGISTER 0B (3CE index A)
Upon exit, the following data is returned:
BL = Value of the controller register

BH = 1B	READ CONTROLLER REGISTER 1 (3CE index B)
Upon exit, the following data is returned:
BL = Value of the controller register

BH = 1C	READ CONTROLLER REGISTER 2 (3CE index C)
Upon exit, the following data is returned:
BL = Value of the controller register

BH = 1D	READ CONTROLLER REGISTER 3 (3CE index D)
Upon exit, the following data is returned:
BL = Value of the controller register

BH = 1E	READ CONTROLLER REGISTER 4 (3CE index E)
Upon exit, the following data is returned:
BL = Value of the controller register

BH = 1F	READ CONTROLLER REGISTER 5 (3CE index F)
Upon exit, the following data is returned:
BL = Value of the controller register

Upon exit, the BH register will equal 7F if the call has been successful.  Note that the state of the controller registers cannot be assumed between standard Setmode calls and should not be assumed in general.


CONNECTOR AND HEADER LOCATIONS

The following illustration shows the location of the system board connectors and headers.

A.	VGA video connector J1

B.	Parallel connector J2

C.	Serial port 1 connector J3

D.	Serial port 2 connector J4

E.	Mouse connector J5

F.	Keyboard connector J6

G.	Offboard battery header J7

H.	Auxiliary fan power header J11

I.	Power connectors J10, J15

J.	3 1/2-inch floppy disk drive header J18

K.	IDE disk drive header J17

L.	ISA riser card connector J8

M.	Front panel reset switch header J24

N.	Front panel keyboard lock switch/power LED header J23

O.	Front panel hard disk drive activity LED header J22

P.	VESA-compliant 8514/A standard feature header J12

Related Topics:

VGA VIDEO CONNECTOR

PARALLEL CONNECTOR

SERIAL CONNECTORS

KEYBOARD AND MOUSE CONNECTORS

OFFBOARD BATTERY HEADER

AUXILIARY FAN POWER HEADER

POWER CONNECTORS

FLOPPY DISK DRIVE HEADER

IDE HARD DISK DRIVE HEADER

ISA RISER CARD CONNECTOR

RESET SWITCH HEADER

KEYBOARD LOCK SWITCH/POWER LED HEADER

HARD DISK DRIVE ACTIVITY LED HEADER

VESA-COMPLIANT 8514/A STANDARD FEATURE HEADER


VGA VIDEO CONNECTOR

The system board illustration shows the location of  the VGA video connector.

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 system board illustration shows the location of the parallel connector.

Pin Number	Signal Name	Pin Number	Signal Name

1	Strobe* (1)	10	ACK* (3)1

2	Data bit 0 (2)	11	BUSY (3)1

3	Data bit 1 (2)	12	Paper end (3)

4	Data bit 2 (2)	13	SLCT  (3)

5	Data bit 3 (2)	14	Auto feed XT (1)

6	Data bit 4 (2)	15	ERROR* (3)

7	Data bit 5 (2)	16	INIT* (1)

8	Data bit 6 (2)	17	SLCT IN (1)

9	Data bit 7 (2)	18 - 25	Ground

(1) = Output; (2) = Bidirectional; (3) = Input


SERIAL CONNECTORS

The system board illustration shows the location of the serial connectors.  Serial Port 1 (COM1) is J3 and Serial Port 2 (COM2) is J4.

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 connectors.

Pin Number	Signal Name

1	Data

2	No Connection

3	Ground

4	+5 V dc (Vcc)

5	Clock

6	No connection


OFFBOARD BATTERY HEADER

The system board illustration shows the location of  the offboard battery header J7.

Pin Number	Signal Name

1	+3.6 V dc battery

2	Key

3	Ground

4	Ground


AUXILIARY FAN POWER HEADER

The system board illustration shows the location of  the auxiliary fan power header (not used) J11.

Pin Number	Signal Name

1	Ground

2	+12 V dc

3	Ground


POWER CONNECTORS

The system board illustration shows the location of the system board power connectors J10 and J15.

Pin Number	Signal Name	Pin Number	Signal Name

J10-1	Power good	J15-1	Ground

J10-2	+5 V dc (Vcc)	J15-2	Ground

J10-3	+12 V dc	J15-3	-5 V dc

J10-4	-12 V dc	J15-4	+5 V dc (Vcc)

J10-5	Ground	J15-5	+5 V dc (Vcc)

J10-6	Ground	J15-6	+5 V dc (Vcc)


FLOPPY DISK DRIVE HEADER

The system board illustration shows the location of the floppy disk drive connector J18.

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


IDE HARD DISK DRIVE HEADER

The system board illustration shows the location of the IDE hard disk drive header J17.

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


ISA RISER CARD CONNECTOR

The system board illustration shows the location of the ISA riser card connector J8.

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


RESET SWITCH HEADER

The system board illustration shows the location of the front panel reset switch header J24.

Pin Number	Signal Name

1	RESET

2	Ground


KEYBOARD LOCK SWITCH/POWER LED HEADER

The system board illustration shows the location of the front panel keyboard lock switch/power LED J23.

Pin Number	Signal Name

1	LED power

2	Key

3	Ground

4	KEYLOCK*

5	Ground


HARD DISK DRIVE ACTIVITY LED HEADER

The system board illustration shows the location of the front panel hard disk drive activity LED header J22.

Pin Number	Signal Name

1	LED power (+ 5 V dc)

2	HD_ACTIVE*

* = Active low signal


VESA-COMPLIANT 8514/A STANDARD FEATURE HEADER

The system board illustration shows the location of the VESA-compliant 8514/A standard feature header J12.

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