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WD1002S-WX2

WESTERN DIGITAL CORPORATION

WD1002S-WX2

Data bus: 8-bit, PC/XT

Size: Full-length, half-height card

Hard drives supported: Two MFM ST506/412 drives

Floppy drives supported: None

CONNECTIONS

Function

Location

34-pin control cable connector-hard drive

J1

20-pin data cable connector-drive 0

J2

20-pin data cable connector-drive 1

J3

USER CONFIGURABLE SETTINGS

Function

Location

Setting

 

Reserved for BIOS

SW1/8

open

 

Reserved for BIOS

SW1/7

open

 

Reserved for BIOS Virtual option

SW1/6

open

 

Reserved for BIOS Auto-config option

SW1/5

open

Normal operation

W1

pins 1 & 2 closed

 

Factory test

W1

pins 2 & 3 closed

Normal operation

W2

pins 1 & 2 closed

 

Factory test

W2

pins 2 & 3 closed

BIOS enabled

W3

closed

 

BIOS disabled

W3

open

I/O port address 320h

W4

pins 2 & 3 closed

 

I/O port address 324h

W4

pins 1 & 2 closed

BIOS size 32K or 64K (hard-wired)

W5

pins 1 & 2 closed

 

BIOS size 16K

W5

pins 2 & 3 closed

8 Head hard drive with RWC supported

W6

pins 2 & 3 closed

 

16 head hard drive supported (Head Select 3)

W6

pins 1 & 2 closed

Hard Drive Interrupt is IRQ5 (hard-wired)

W7

pins 1 & 2 closed

 

Hard Drive Interrupt is IRQ2

W7

pins 2 & 3 closed

BIOS DRIVE TYPE TABLE - SW1

JUMPERS 1 AND 2 CONFIGURE DRIVE 1

JUMPERS 3 AND 4 CONFIGURE DRIVE 0

#

Jumper 1 & 3

Jumper 2 & 4

Cap.

Hds.

Cyls.

WP

RWC

0

closed

closed

21MB

4

612

613

613

1

open

closed

10MB

2

612

128

128

2

closed

open

21MB

4

612

128

613

3

open

open

10MB

4

306

all (0)

306

MISCELLANEOUS TECHNICAL NOTES

This controller has a built-in low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5.