ADAPTEC, INC.

AHA-1520, AHA-1522

Data

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

[Image]

                          CONNECTIONS

                  Function                       Location

  34-pin data cable connector-floppy drive          CN1

  50-pin SCSI cable connector-internal              CN2

  50-pin SCSI cable connector-external              CN3

                        USER CONFIGURABLE SETTINGS

              Function                     Location           Setting

  »   Data transfer in DMA disabled      J5/jumper 1            open

      Data transfer in DMA enabled       J5/jumper 1           closed

  »   Boot enabled (Intercept INT19      J5/jumper 2           closed
      call)

      Boot disabled (INT19 normal)       J5/jumper 2            open

  »   Synchronous negotiation            J5/jumper 5           closed
      enabled

      Synchronous negotiation            J5/jumper 5            open
      disabled

  »   Disconnect by target / INT15       J5/jumper 6           closed
      enabled

      Disconnect by target / INT15       J5/jumper 6            open
      disabled

  »   Factory configured - do not      J5/jumpers 7 & 8         open
      alter

                        USER CONFIGURABLE SETTINGS

              Function                     Location           Setting

  »   SCSI parity check enabled          J6/jumper 8            open

      SCSI parity check disabled         J6/jumper 8           closed

  »   Floppy drive enabled               J7/jumper 1           closed

      Floppy drive disabled              J7/jumper 1            open

  »   Floppy drive Interrupt is          J7/jumper 6           closed
      IRQ6

      Floppy drive Interrupt is          J7/jumper 7           closed
      IRQ10

  »   Floppy drive-dual speed            J7/jumper 8            open
      disabled

      Floppy drive-dual speed            J7/jumper 8           closed
      enabled

  »   I/O port address 340h              J9/jumper 5            open

      I/O port address 140h              J9/jumper 5           closed

                               SCSI ADDRESS

    SCSI ID         J6/jumper 1        J6/jumper 2         J6/jumper 3

          0            open                open               open

          1           closed               open               open

          2            open               closed              open

          3           closed              closed              open

          4            open                open              closed

          5           closed               open              closed

          6            open               closed             closed

  »       7           closed              closed             closed

                                DMA CHANNEL

   DMA       J6/6       J6/7      J8/1 &    J8/2 &     J8/3 &    J8/4 & 8
                                    5         6          7

      7     closed     closed    closed      open      open        open

      6      open      closed     open      closed     open        open

      5     closed      open      open       open     closed       open

  »   0      open       open      open       open      open       closed

                             INTERRUPT REQUEST

     IRQ        J6/4      J6/5      J9/1      J9/2       J9/3      J9/4

      IRQ9      open      open      open      open       open     closed

      IRQ10    closed     open      open      open      closed     open

  »   IRQ11     open     closed     open     closed      open      open

      IRQ12    closed    closed    closed     open       open      open

                               BIOS ADDRESS

       Address          J9/jumper 6       J9/jumper 7       J9/jumper 8

  »       DC000h           closed           closed            closed

          C8000h            open             open             closed

          CC000h            open            closed            closed

          D8000h           closed            open             closed

         Disabled           N/A               N/A              open

                           FLOPPY DRIVE DMA - J7

                           DRQ           DACK

           DMA          Jumper 2       Jumper 3     Jumper 4    Jumper 5

  »   DMA Channel 2      closed          open        closed       open

      DMA Channel 3       open          closed        open       closed

                              MESSAGE SELECT

     MSG #0 - ADAPTEC HEADERMSG #1 - JUMPER CONFIG. INFO. MSG #2 - SCSI
                               DEVICE INFO.

            MSG #3 - BOOT PROGRESS INFO.MSG #4 - ERROR MESSAGES

          Message                JP5/jumper 3            JP5/jumper 4

  »   Msg #0 and #4                  open                    open

      Msg #0, #3 and #4              open                   closed

      All messages                  closed                   open
      displayed

      Msg #4 only                   closed                  closed