WESTERN DIGITAL CORPORATION

WD1002S-WX2A

Data bus: 8-bit, PC/XT

Size: Full-length, full-height card

Hard drives supported: Two MFM ST506/412 drives

Floppy drives supported: None

[Image]

                        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

               Function                     Location          Setting

  »   Not used                              W1 & W2             N/A

  »   BIOS enabled                             W3              closed

      BIOS disabled                            W3               open

  »   I/O port address 320h                    W4            pins 2 & 3
                                                               closed

      I/O port address 324h                    W4            pins 1 & 2
                                                               closed

  »   BIOS size 32K or 64K                     W5            pins 1 & 2
                                                               closed

      BIOS size 16K                            W5            pins 2 & 3
                                                               closed

  »   16 head hard drive supported             W6            pins 1 & 2
      (Head Select 3)                                          closed

      8 Head hard drive with RWC               W6            pins 2 & 3
      supported                                                closed

  »   Hard Drive Interrupt is IRQ5             W7            pins 1 & 2
                                                               closed

      Hard Drive Interrupt is IRQ2             W7            pins 2 & 3
                                                               closed

  »   Factory setting                          W8            pins 2 & 3
                                                               closed

      CO23 setting                             W9            pins 1 & 2
                                                               closed

  »   Standard Configuration                  W10            pins 2 & 3
                                                               closed

      Special feature                         W10            pins 1 & 2
                                                               closed

  »   Factory configured - do not         SW1/jumper 5          open
      alter

  »   Factory configured - do not         SW1/jumper 6          open
      alter

  »   Hard Drive Interrupt is IRQ5        SW1/jumper 7          open

      Hard Drive Interrupt is IRQ2        SW1/jumper 7         closed
      (JP7/pins 2-3 must be closed
      and a custom BIOS must be
      install)

  »   AT mode enabled                     SW1/jumper 8         closed

      XT mode enabled                     SW1/jumper 8          open

                BIOS REVISION "SUPER BIOS" DRIVE TYPE TABLE

      Drive     Drive
        1        0

  #   SW1/1    SW1/2     SW1/3    SW1/4    Cap.   Hds   Cyls.   WP    RWC

  0   closed   closed    closed   closed   21MB   4     612     450   450

  1   open     closed    open     closed   10MB   4     306     0     153

  2   closed    open     closed   open     10MB   2     615     450   450

  3   open      open     open     open     21MB   4     615     450   450

                    BIOS REVISION "G" DRIVE TYPE TABLE

  #   Drive    Drive
        1        0

  #   SW1/1    SW1/2    SW1/3    SW1/4    Cap.   Hds.   Cyl.   WP    RWC

  0   closed   closed   closed   closed   20MB    4     612    0    none

  1   open     closed    open    closed   10MB    2     612    128   128

  2   closed   open     closed    open    20MB    4     612    128  none

  3   open     open      open     open    10MB    4     306    0    none

                    BIOS REVISION "H" DRIVE TYPE TABLE

                    JUMPERS 3, 4, & 8 CONFIGURE DRIVE 0

                    JUMPERS 1, 2 & 7 CONFIGURE DRIVE 1

  #    SW1/1 &   SW1/2 &    SW1/7 &   Cap.    Hds   Cyl.     WP      RWC
         3          4         8

  0    closed    closed     closed    42MB    5     977     none    none

  1     open     closed     closed    31MB    5     733     300     none

  2    closed     open      closed    33MB    6     640     none    none

  3     open      open      closed    62MB    8     1024    1024    1024

  4    closed    closed      open     42MB    6     820     none    none

  5     open     closed      open     10MB    2     612     128      128

  6    closed     open       open     20MB    4     612     128     none

  7     open      open       open     10MB    4     306      0      none

                       MISCELLANEOUS TECHNICAL NOTES

  This controller can be purchased with several different BIOS revisions.
    The Super BIOS revision includes the following features not found in
       other revisions: ability to format bad tracks, dual controller
   operation, automatic configuration, virtual drive operation, and PC/AT
                              compatibility.

   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.