COMPUADD, INC.
==============

   HARDCACHE/SCSI

   +------------------------------------------------------------+
   +------------------------------------------------------------+

   Data bus: 16-bit, ISA

   Size: Full-length, full-height card

   Hard drives supported:  Two SCSI drives, up to 5 other SCSI
   devices

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

<gopher://bitreich.org/I/th99/c/C-D/20045-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector-external           |       CN1       |
   |------------------------------------------+-----------------|
   | 4-pin connector-drive active LED         |       J1        |
   |------------------------------------------+-----------------|
   | 34-pin data cable connector-floppy drive |       J2        |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector-internal           |       J3        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Location   |  Setting   |
   |--------------------------------+--------------+------------|
   |>> | Block Data Transfer mode   | SW1/switch 1 |     on     |
   |---+----------------------------+--------------+------------|
   |   | IRQ-Paced Data Transfer    | SW1/switch 1 |    off     |
   |   | mode                       |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Read config. sector on     | SW1/switch 2 |     on     |
   |   | drive 0                    |              |            |
   |---+----------------------------+--------------+------------|
   |   | Read config. data in       | SW1/switch 2 |    off     |
   |   | firmware                   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive address       | SW1/switch 3 |    off     |
   |   | 3F0-3F7h                   |              |            |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive address       | SW1/switch 3 |     on     |
   |   | 370-377h                   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive enabled       | SW1/switch 4 |    off     |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive disabled      | SW1/switch 4 |     on     |
   |---+----------------------------+--------------+------------|
   |>> | Single-speed floppy drive  | SW1/switch 5 |    off     |
   |   | supported                  |              |            |
   |---+----------------------------+--------------+------------|
   |   | Dual-speed floppy drive    | SW1/switch 5 |     on     |
   |   | supported                  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | BIOS enabled               | SW1/switch 6 |     on     |
   |---+----------------------------+--------------+------------|
   |   | BIOS disabled              | SW1/switch 6 |    off     |
   |---+----------------------------+--------------+------------|
   |>> | BIOS address C800-C9FFh    | SW2/switch 1 |    off     |
   |---+----------------------------+--------------+------------|
   |   | BIOS address CA00-CBFFh    | SW2/switch 1 |     on     |
   |---+----------------------------+--------------+------------|
   |>> | Hard drive address         | SW2/switch 2 |    off     |
   |   | 1F0-1F7h                   |              |            |
   |---+----------------------------+--------------+------------|
   |   | Hard drive address         | SW2/switch 2 |     on     |
   |   | 170-177h                   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | 256KB SIMM's supported     | SW2/switch 6 |     on     |
   |---+----------------------------+--------------+------------|
   |   | 1MB SIMM's supported       | SW2/switch 6 |    off     |
   |---+----------------------------+--------------+------------|
   |>> | Hard Drive Interrupt is    |      W1      | pins 1 & 2 |
   |   | IRQ14                      |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Hard Drive Interrupt is    |      W1      | pins 2 & 3 |
   |   | IRQ10                      |              |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SCSI ADDRESS                        |
   |------------------------------------------------------------|
   |  SCSI ID   | SW2/switch 3  | SW2/switch 4  | SW2/switch 5  |
   |------------+---------------+---------------+---------------|
   |    |   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       |
   +------------------------------------------------------------+