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WD1003-RAH, WD1003-WAH

WESTERN DIGITAL CORPORATION

WD1003-RAH, WD1003-WAH

Replaced by the WD1003V-SR1

and WD1003V-MM1 respectively

Data bus: 16-bit, PC/AT

Size: Full-length, full-height card

Hard drives supported: WD1003-RAH: Two RLL ST506/412 drives

WD1003-WAH: Two MFM ST506/412 drives

Floppy drives supported: None

CONNECTIONS

Function

Location

34-pin data cable connector-hard drive

J1

20-pin data cable connector-drive 0

J2

20-pin data cable connector-drive 1

J3

4-pin connector-drive active LED

J6

USER CONFIGURABLE SETTING - WD1003-RAH

Function

Location

Setting

Auto deselect enabled (PC/AT)

W1

closed

 

Auto deselect disabled (Compaq)

W1

open

Hard drive port address is 1F0-1F7 & 3F0-3F7h

W2

open

 

Hard drive port address is 170-177 & 370-377h

W2

closed

 

WD11C00C-22 chip at U8 or if W5/pins 2-3 closed

W3

open

 

WD11C00-22 chip at U8 & W5/pins 1-2 closed

W3

closed

Drive 0 translation disabled

W4

pins 2 & 3 closed

 

Drive 0 translation enabled

W4

pins 1 & 2 closed

Write gate and drive select lines enabled

only when drive is accessed

W5

pins 2 & 3 closed

 

Write gate and drive select lines are disabled during power-up and when +5V is < +4.15V

W5

pins 1 & 2 closed

Drive 1 logical translation disabled

W6

pins 2 & 3 closed

 

Drive 1 logical translation enabled

W6

pins 1 & 2 closed

USER CONFIGURABLE SETTINGS - WD1003-WAH

Function

Location

Setting

Auto deselect enabled (PC/AT)

W1

closed

 

Auto deselect disabled (Compaq)

W1

open

Hard drive port address is 1F0-1F7 & 3F0-3F7

W2

open

 

Hard drive port address is 170-177 & 370-377

W2

closed

 

WD11C00A-22 chip at U8 or if W5/pins 2-3 closed

W3

open

 

WD11C00-22 chip at U8 & W5/pins 1-2 closed

W3

closed

Ties firmware sense bit high

W4

pins 2 & 3 closed

 

Supports 2 head, 612 cyl. second drive with tandard system setup for 4 head, 306 cyl. drive

W4

pins 1 & 2 closed

Write gate and drive select lines enabled

only when drive is accessed

W5

pins 2 & 3 closed

 

Write gate and drive select lines are disabled during power-up and when +5V is < +4.15V

W5

pins 1 & 2 closed

Ties input high, 35 m

W6

pins 2 & 3 closed

 

Ties input low, 16 m

W6

pins 1 & 2 closed