WESTERN DIGITAL CORPORATION

WDAT-440

Data bus: 16-bit, PC/AT

Size: Half-length, full-height card

Hard drives supported: Two IDE (AT) Interface drives

Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB

Special features: Two serial and one parallel port

[Image]

                                CONNECTIONS

                     Function                             Location

  34-pin data cable connector-floppy drive                   J1

  25-pin parallel port-external                              J2

  40-pin IDE (AT) Interface control cable                    J5
  connector-internal

  4 pin connector drive- active LED                          J6

  9-pin serial port-external                                 J8

                           DIRQ14 SIGNAL SELECT

                 DIRQ                          W3                W3

  »   DIRQ14 signal passed to host         pins 1 & 2        pins 2 & 3
      computer                                open             closed

      Conner CP342/CP3022 in true IBM      pins 1 & 2        pins 2 & 3
      AT                                     closed             open

WESTERN DIGITAL CORPORATION

WDAT-440

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

  »   Floppy controller enabled               W4              closed

      Floppy controller disabled              W4               open

  »   Floppy drive port address is            W4               open
      3F0-3F7h

      Floppy drive port address is            W4              closed
      370-377h

  »   Single speed floppy drive               W5               open

      Dual speed floppy drive                 W5              closed

  »   Logic ground independent of             W6               open
      chassis

      Logic ground connected to               W6              closed
      chassis

  »   Printer Interrupt is IRQ7               W7             pins 3 & 4
                                                              closed

      Printer Interrupt is IRQ5               W7             pins 1 & 2
                                                              closed

  »   COM2 Interrupt is IRQ3                  W7             pins 5 & 6
                                                              closed

      COM2 Interrupt is IRQ4                  W7             pins 5 & 7
                                                              closed

      COM1 Interrupt is IRQ3                  W7             pins 6 & 8
                                                              closed

      COM1 Interrupt is IRQ4                  W7             pins 7 & 8
                                                              closed

  »   Printer enabled                    W8/jumper 1          closed

      Printer disabled                   W8/jumper 1           open

  »   Printer address, LPT1 =            W8/jumper 2           open
      378-37Fh

      Printer address, LPT2 =            W8/jumper 2          closed
      278-27Fh

  »   External Serial Port = COM1        W8/jumper 3          closed
      (3F8-3FFh)

      External Serial Port = COM3        W8/jumper 4          closed
      (3E8-3EFh)

  »   Internal Serial Port = COM2        W8/jumper 5          closed
      (2F8-2FFh)

      Internal Serial Port = COM4        W8/jumper 6          closed
      (2E8-2EFh)

  »   Enable intelligent drive                W9              closed
      interface

      Disable intelligent drive               W9               open
      interface