AUVA COMPUTER, INC.

HFDC-II

  Data bus:                  16-bit ISA

  Size:                      Three-quarter length, full-height card

  Hard drive supported:      Two MFM ST-506/412 drives

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

[Image]

                              CONNECTIONS

                    Function                           Location

  4-pin connector - drive active LED                      J1

  20-pin data cable connector - drive 1                   J2

  20-pin data cable connector - drive 0                   J3

  34-pin control cable connector - hard drive             J4

  34-pin control cable connector - floppy drive           J5

                        USER CONFIGURABLE SETTINGS

              Function                    Location           Setting

      LED always "on" when system           W1/1               open
      on

      LED "on" only when drive is           W1/1              closed
      being accessed

  »   Four byte ECC enabled                 W1/2               open

      Reserved - do not use                 W1/2              closed

      Cache enabled                         W1/3               open

      Cache disabled                        W1/3              closed

      Interleave ratio is 1:1               W1/4               open

      Maximum interleave ratio is           W1/4              closed
      1:3

      Floppy drive primary address           W2                open
      is 3F2-3F7h

      Floppy drive secondary                 W2               closed
      address is 372-377h

  Note: Close W1/4 when using disks formatted under the WD1003-WAH
  controller.

                   USER CONFIGURABLE SETTINGS CONTINUED

            Function                   Location             Setting

  Hard drive primary address is           W3                  open
  1F0-1F7h

  Hard drive secondary address            W3                 closed
  is 170-177h

  Floppy drive single speed               W4                  open
  enabled

  Floppy drive dual speed                 W4                 closed
  enabled