
WESTERN DIGITAL CORPORATION

WD1007A-WX2

Card Type               Hard drive controller card
Hard Drives supported   Two ESDI drives
Floppy drives supported Two 360KB, 720KB, 1.2MB, or 1.44MB
Data Bus                16-bit ISA
Card Size               Three-quarter length, full-height card

[Image]

                                CONNECTIONS

        Function          Location           Function           Location

  34-pin control cable       J1       34-pin data cable            J4
  connector-hard drive                connector-floppy drive

  20-pin data cable          J2       4-pin connector-drive        J5
  connector-drive 0                   active LED

  20-pin data cable          J3
  connector-drive 1

                        USER CONFIGURABLE SETTINGS

                   Function                      Label        Position

     Factory configured (BIOS enabled)           W3           Closed

     Factory configured (floppy drive            W4            Open
      controller)

     Factory configured (single spindle          W5            Open
      speed select)

     Floppy drive port address is 3F0-3F7h       W6         Pins 2 & 3
                                                               closed

      Floppy drive port address is 370-377h       W6         Pins 1 & 2
                                                               closed

     Factory configured (floppy drive            W7         Pins 1 & 2
      select)                                                  closed

     WD1007 emulation mode                       W8            Open

      WD1005 emulation mode                       W8           Closed

     Factory configured (chassis ground          W9            Open
      disconnected)

     Digital input register unlatched            W10           Open

      Digital input register latched              W10          Closed

     Factory configured (floppy change           W11          Closed
      enable with FDC option)

     Factory configured (secondary address       W12           Open
      select)

     Floppy controller enabled (diskette         W13          Uncut
      drive controller enabled in etch)

     Sector translation enabled                  W14           Open

      Sector translation disabled                 W14          Closed

     Factory configured (ECC length is 4         W15           Open
      bytes)

                          BIOS ADDRESS SELECTION

            Address                      W1                   W2

           C8000-C9FFFh         Pins 2 & 3 closed     Pins 2 & 3 closed

            CA000-CBFFFh         Pins 2 & 3 closed     Pins 1 & 2 closed

            CC000-CDFFFh         Pins 1 & 2 closed     Pins 2 & 3 closed

            CE000-CFFFFh         Pins 1 & 2 closed     Pins 1 & 2 closed

                    MISCELLANEOUS TECHNICAL INFORMATION

    The WD1007A supports 1:1 interleave drives with up to 2048 cylinders
                               and 16 heads.

