
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

