BUSLOGIC, INC.

BT-545S

  Data bus:                16-bit, ISA

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

  Hard drive supported:    Up to seven SCSI drives

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

[Image]

                      CONNECTIONS

                Function                   Location

  4-pin connector - Drive Active LED          J1

  34-pin cable connector - floppy drive       J2

  50-pin SCSI connector - internal            J3

  50-pin SCSI connector - external            J4

                               SCSI ADDRESS

    Address         SB1/switch 1       SB1/switch 2       SB1/switch 3

          0             off                off                 off

          1             off                off                 on

          2             off                 on                 off

          3             off                 on                 on

          4              on                off                 off

          5              on                off                 on

          6              on                 on                 off

  »       7              on                 on                 on

                                DMA CHANNEL

            DRQ                 SB1/switch 7            SB1/switch 8

           Disabled                  off                     off

             DRQ7                    on                      off

             DRQ6                    off                     on

  »          DRQ5                    on                      on

                             I/O PORT ADDRESS

      Address          SB2/switch 1      SB2/switch 2      SB2/switch 3

        Reserved           off               off                off

        134-137h           off               off                on

        234-237h           off                on                off

        334-337h           off                on                on

        Reserved            on               off                off

        130-133h            on               off                on

        230-233h            on                on                off

  »     330-333h            on                on                on

                               BIOS ADDRESS

          Address               SB2/switch 4            SB2/switch 5

             C800h                   off                     off

           Disabled                  on                      off

             D800h                   off                     on

  »          DC00h                   on                      on

                            INTERRUPT REQUEST

         IRQ           SB2/switch 6      SB2/switch 7      SB2/switch 8

         Reserved           off               off               off

         Reserved           off               off               on

          IRQ15             off               on                off

          IRQ14             off               on                on

          IRQ12             on                off               off

           IRQ9             on                off               on

          IRQ10             on                on                off

  »       IRQ11             on                on                on

         Jumpers W3-W8 must be set in accordance with SB2/switches 6-8

                        USER CONFIGURABLE SETTINGS

              Function                     Location           Setting

  »   SCSI parity check enabled          SB1/switch 4            on

      SCSI parity check disabled         SB1/switch 4           off

      >1GB drive support disabled        SB1/switch 5            on

      >1GB drive support enabled*        SB1/switch 5           off

  »   Sync Negotiation initiated by      SB1/switch 6            on
      BT-545S disabled

      Sync Negotiation initiated by      SB1/switch 6           off
      BT-545S enabled

  »   Factory Configured - do not             W2                open
      alter

  »   Factory Configured - do not             W9                open
      alter

  »   Floppy drive port address is           W14                open
      3F0-3F7h

      Floppy drive port address is           W14               closed
      370-377h

  »   Floppy drive enabled                W15 & W16            closed

      Floppy drive disabled               W15 & W16             open

  »   IOCHRDY enabled                        W17              Pins 1-2
                                                               closed

      IOCHRDY disabled                       W17              Pins 2-3
                                                               closed

  »   Factory Configured - do not            W18               closed
      alter

  »   Sync transfer rate is 5MB/sec          W19               closed

      Sync transfer rate is                  W19                open
      10MB/sec

  Note:The SCO UNIX device driver does not support drives greater than
  1GB.

                             DMA TRANSFER RATE

            Speed                      W11                    W13

  »           5MB/sec                  open                  open

             5.7MB/sec                 open                 closed

             6.7MB/sec                closed                 open

             8.0MB/sec                closed                closed

                            INTERRUPT REQUEST

     IRQ          W3        W4        W5        W6        W7        W8

       IRQ15    closed     open      open      open      open      open

       IRQ14     open     closed     open      open      open      open

       IRQ12     open      open     closed     open      open      open

  »    IRQ11     open      open      open     closed     open      open

       IRQ10     open      open      open      open     closed     open

       IRQ9      open      open      open      open      open     closed

         SB2/switches 6-8 must be set in accordance with Jumpers W3-W8