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WD1003S-RAH

WESTERN DIGITAL CORPORATION

WD1003S-RAH

Data bus: 16-bit, ISA

Size: Half-length, full-height card

Hard drives supported: Two ST506/412 RLL drives

Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS

Function

Location

34-pin control cable connector-hard drives

CN1

20-pin data cable connector-Drive 0

CN2

20-pin data cable connector-Drive 1

CN3

34-pin data cable connector-secondary hard drive (See JP7 settings)

CN5

4-pin connector-drive active LED

CN6

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Auto deselect enabled (PC/AT)

JP1

pins 1 & 2 closed

 

Auto deselect disabled (Compaq)

JP1

open

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

JP2

open

 

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

JP2

closed

Drive 0 translation disabled

JP4

pins 1 & 2 closed

 

Drive 0 translation enabled*

JP4

pins 2 & 3 closed

Write Gate and drive select lines are enabled only

when drive is accessed

JP5

pins 2 & 3 closed

 

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

JP5

pins 1 & 2 closed

Drive 1 translation disabled

JP6

pins 1 & 2 closed

 

Drive 1 translation enabled*

JP6

pins 2 & 3 closed

Input tied high

JP8

pins 1 & 2 closed

 

Seek to LZ (663) on seek > than 615. Step rate 0

(11 m m

JP8

pins 2 & 3 closed

Note: Translates 4 x 615 x 26 to 6 x 615 x 17

DRIVE ATTACHMENT CONFIGURATION

Function

JP7

Both drives daisy-chained from CN1, or Drive 0 is attached to CN1 and drive 1 is attached to CN5

 

pins 1 & 2 and 2 & 3 closed (vertically)

Drive 0 attached to CN5, Drive 1 attached to CN1

pins 1 & 3 and 2 & 4 closed (horizontally)