WESTERN DIGITAL CORPORATION
WD1003S-RAH
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  | 
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)  |