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.