WESTERN DIGITAL CORPORATION
WD1002A-27X
Replaced by the WD1004A-27X
Data bus: 8-bit, PC/XT
Size: Half-length, full-height card
Hard drives supported: Two RLL ST506/412 drives
Floppy drives supported: None
Maximum heads/cyl.: 16 heads and 1024 cylinders
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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 |
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USER CONFIGURABLE SETTINGS | ||||
|
Mode |
Mode Description |
Jumper |
Position | |
|
1 |
Supports low-level and dynamic low-level formatting. Performs logical translations; (i.e.-4 hds., 615 cyls. and 26 SPT would be seen by DOS as 4 hds. 940 cyls. 17 SPT. Supports only up to 16 heads and 663 cylinders (physical). |
W1 W2 |
closed closed | |
|
2 |
Supports low-level and dynamic low-level formatting. Does not do logical translation. Supports up to 16 heads and 1024 cylinders (physical). |
W1 W2 |
open open | |
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MISCELLANEOUS TECHNICAL NOTES |
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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. |