ADAPTEC, INC.

AHA-1540C, AHA-1542C

Data bus:                16-bit, ISA
Size:                    Half-length, full-height card
Hard drive supported:    Up to seven SCSI devices
Floppy drives supported: 360KB, 720KB, 1.2MB, or 1.44MB (2)

[Image]

                       CONNECTIONS

                 Function                     Location

  SCSI drive interface (50 pin) internal        CN1

  SCSI drive interface (50 pin) external        CN2

  Floppy drive interface (AHA-1542C only)       CN3

  Hard drive activity LED                       CN4

                        USER CONFIGURABLE SETTINGS

               Function                     Location          Setting

  »   SCSI Termination set with           SW1/switch 1          off
      configuration software

      SCSI Termination enabled            SW1/switch 1           on

  »   Floppy drive enabled                SW1/switch 5          off

      Floppy drive disabled               SW1/switch 5           on

                I/O PORT ADDRESS CONFIGURATION

    Address      SW1/switch 2    SW1/switch 3    SW1/switch 4

    330-333h          off             off            off

    334-337h          on              off            off

    230-233h          off             on             off

    234-237h          on              on             off

    130-133h          off             off             on

    134-137h          on              off             on

    Reserved          off             on              on

    Reserved          on              on              on

                  BIOS ADDRESS CONFIGURATION

    Address      SW1/switch 6    SW1/switch 7    SW1/switch 8

     DC000h           off             off            off

     D8000h           on              off            off

     D4000h           off             on             off

     D0000h           on              on             off

     CC000h           off             off             on

     C8000h           on              off             on

    Reserved          off             on              on

    Disabled          on              on              on