COMPAQ COMPUTER CORPORATION

000519 HARD DISK DRIVE CONTROLLER BOARD

  Data bus:                16-bit, ISA

  Size:                    Three/quarter-length, full-height card

  Hard drive supported:    Two IDE (AT) Interface drives

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

[Image]

                              CONNECTIONS

                    Function                           Location

  40-pin IDE(AT) Interface connector                      CN1

  34-pin control cable connector - floppy drive           CN2

  10-pin serial port (COM1/2) - external                  CN3

  25-pin parallel port (LPT1/2) - external                CN4

                        USER CONFIGURABLE SETTINGS

             Function                     Location            Setting

  »   Hard drive port address is       SW500/switch 1           open
      1F0-1F7h

      Floppy drive port address
      is 3F0-3F7h

      Hard drive port address is       SW500/switch 1          closed
      170-177h

      Floppy drive port address
      is 370-377h

  »   High-speed floppy drive          SW500/switch 2          closed
      transfer rate enabled

      High-speed floppy drive          SW500/switch 2           open
      transfer rate disabled

  »   Hard drive enabled               SW500/switch 3           open

      Hard drive disabled              SW500/switch 3          closed

  »   Serial Port (CN3) is set to      SW500/switch 4           open
      COM1

      Serial Port (CN3) is set to      SW500/switch 4          closed
      COM2

  »   Serial Port (CN3) enabled        SW500/switch 5           open

      Serial Port (CN3) disabled       SW500/switch 5          closed

  »   Parallel Port (CN3) enabled      SW500/switch 6           open

      Parallel Port (CN3)              SW500/switch 6          closed
      disabled