ADAPTEC, INC.

AHA-1540

  Data bus:                  16-bit ISA

  Size:                      Full-length, full-height card

  Hard drive supported:      Up to seven SCSI drives

  Floppy drives supported:   None

[Image]

                       CONNECTIONS

               Function                    Location

  50-pin SCSI connector - internal            CN1

  2-pin connector - drive active LED          LED

                        USER CONFIGURABLE SETTINGS

              Function                    Location            Setting

  »   Synchronous negotiation               J1/A               open
      disabled

      Synchronous negotiation               J1/A              closed
      enabled

  »   Factory configured - do not           J1/B               open
      alter

  »   Parity enabled                        J1/C               open

      Parity disabled                       J1/C              closed

  »   Wait state disabled                    J4                 N/A

      Wait state enabled                     J4                 N/A

                        SCSI ADDRESS CONFIGURATION

      Address             J1/D              J1/E               J1/F

  »        7              open              open               open

           0             closed            closed             closed

           1              open             closed             closed

           2             closed             open              closed

           3              open              open              closed

           4             closed            closed              open

           5              open             closed              open

           6             closed             open               open

                           DMA CHANNEL SELECTION

   Channel       J1/G        J1/H         J6/A        J6/B        J6/C

  »     5        open       closed        open       closed       open

        0       closed      closed       closed       open        open

        6       closed       open         open        open       closed

        7        open        open         open        open        open

                       DMA CHANNEL SELECTION (CON’T)

   Channel       J6/D        J7/A         J7/B        J7/C        J7/D

  »     5        open        open        closed       open        open

        0        open       closed        open        open        open

        6        open        open         open       closed       open

        7       closed       open         open        open       closed

                          AT INTERRUPT SELECTION

       IRQ           J1/I       J1/J        J1/K       J8/A        J8/B

  »       11         open      closed       open       open        open

          9          open       open        open      closed       open

          10        closed      open        open       open       closed

          12        closed     closed       open       open        open

          14         open       open       closed      open        open

          15        closed      open       closed      open        open

          Not        open      closed      closed       N/A        N/A
       defined

          Not       closed     closed      closed       N/A        N/A
       defined

                      AT INTERRUPT SELECTION (CON’T)

      IRQ           J8/C           J8/D           J8/E           J8/F

  »      11        closed          open           open           open

         9          open           open           open           open

         10         open           open           open           open

         12         open          closed          open           open

         14         open           open          closed          open

         15         open           open           open          closed

                              PORT ADDRESS SELECTION

  Address    J9/A     J9/B     J9/C     J9/D    J9/E     J9/F     J9/G     J9/H

  »   330h   open     open    closed   closed   open     open     closed   closed

      004h  closed    open     open     open    open     open     open     open

      008h   open    closed    open     open    open     open     open     open

      010h   open     open    closed    open    open     open     open     open

      020h   open     open     open    closed   open     open     open     open

      040h   open     open     open     open    closed   open     open     open

      080h   open     open     open     open    open     closed   open     open

      100h   open     open     open     open    open     open     closed   open

      200h   open     open     open     open    open     open     open     closed

                         AT BIOS ADDRESS SELECTION

       Address              J10/A             J10/B            J10/C

  »       DC000h             open             open             open

          C8000h            closed            open            closed

          D8000h             open             open            closed

          CC000h            closed            open             open