(TXT) View Source
       
       # 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
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        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                 |
          |------------------------------------------------------------|
          | Mode  |        Mode Description        | Jumper | Position |
          |-------+--------------------------------+--------+----------|
          |   | » | Supports low-level and dynamic |        |          |
          |   |   | low-level formatting. Performs |        |          |
          |   | » | logical translations; (i.e.-4  |   W1   |  closed  |
          |   |   | hds., 615 cyls. and 26 SPT     |        |          |
          |   | 1 | would be seen by DOS as 4 hds. |   W2   |  closed  |
          |   |   | 940 cyls. 17 SPT. Supports     |        |          |
          |   |   | only up to 16 heads and 663    |        |          |
          |   |   | cylinders (physical).          |        |          |
          |---+---+--------------------------------+--------+----------|
          |   |   | Supports low-level and dynamic |   W1   |   open   |
          |   |   | low-level formatting. Does not |        |          |
          |   | 2 | do logical translation.        |   W2   |   open   |
          |   |   | Supports up to 16 heads and    |        |          |
          |   |   | 1024 cylinders (physical).     |        |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               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.           |
          +------------------------------------------------------------+