CONTROL CONCEPTS, INC.
======================

   HB A8

   Data bus: 8-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
   (Floppy support version only)

<gopher://bitreich.org/I/th99/c/C-D/20049-1.png>
   

   +------------------------------------------------------------+
   |                MISCELLANEOUS TECHNICAL NOTE                |
   |------------------------------------------------------------|
   | JP6 is not used and should remain open. S1/switch 7 is not |
   |                used and should remain off.                 |
   |                                                            |
   |        Turning on S1/switch 8 will result in error         |
   +------------------------------------------------------------+

   CONTROL CONCEPTS USA

   HB A8

                               . . . continued from previous page

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 4-pin connector-drive active LED         |       CN1       |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector-internal           |       CN2       |
   |------------------------------------------+-----------------|
   | 34-pin data cable connector-floppy drive |       CN3       |
   |------------------------------------------+-----------------|
   | 25-pinSCSI connector-external            |       CN4       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Location   |  Setting   |
   |--------------------------------+--------------+------------|
   |>> | Floppy drive enabled       |     JP1      | pins 1 & 2 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive disabled      |     JP1      | pins 2 & 3 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive address       |     JP2      | pins 1 & 2 |
   |   | 3F0-3F7h                   |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive address       |     JP2      | pins 2 & 3 |
   |   | 370-377h                   |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | Single spindle speed       |     JP3      |    open    |
   |   | selected                   |              |            |
   |---+----------------------------+--------------+------------|
   |   | Dual spindle speed         |     JP3      |   closed   |
   |   | selected                   |              |            |
   |---+----------------------------+--------------+------------|
   |   | IRQ3 (Interrupt            | JP4/jumper 1 |   closed   |
   |   | request-N/A in DOS)        |              |            |
   |---+----------------------------+--------------+------------|
   |   | IRQ4 (Interrupt            | JP4/jumper 2 |   closed   |
   |   | request-N/A in DOS)        |              |            |
   |---+----------------------------+--------------+------------|
   |>> | IRQ5 (Interrupt            | JP4/jumper 3 |   closed   |
   |   | request-N/A in DOS)        |              |            |
   |---+----------------------------+--------------+------------|
   |   | IRQ7 (Interrupt            | JP4/jumper 4 |   closed   |
   |   | request-N/A in DOS)        |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Precompensation value is   |     JP5      |    open    |
   |   | 125ns                      |              |            |
   |---+----------------------------+--------------+------------|
   |   | Precompensation value is   |     JP5      |   closed   |
   |   | 185ns                      |              |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |    Address    | S1/switch 1  | S1/switch 2  | S1/switch 3  |
   |---------------+--------------+--------------+--------------|
   | C8000-CBE80h  |     off      |      on      |      on      |
   |---------------+--------------+--------------+--------------|
   | E0000-E3E80h  |      on      |     off      |      on      |
   |---------------+--------------+--------------+--------------|
   | DC000-DFE80h  |     off      |     off      |      on      |
   |---------------+--------------+--------------+--------------|
   | D8000-DBE80h  |      on      |      on      |     off      |
   |---------------+--------------+--------------+--------------|
   | D4000-D7E80h  |     off      |      on      |     off      |
   |---------------+--------------+--------------+--------------|
   | D0000-D3E80h  |      on      |     off      |     off      |
   |---------------+--------------+--------------+--------------|
   | CC000-CFE80h  |     off      |     off      |     off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SCSI ADDRESS                        |
   |------------------------------------------------------------|
   |  SCSI ID #  |  S1/switch 4  |  S1/switch 5  | S1/switch 6  |
   |-------------+---------------+---------------+--------------|
   |>>   |   7   |      off      |      off      |     off      |
   |-----+-------+---------------+---------------+--------------|
   |     |   6   |      on       |      off      |     off      |
   |-----+-------+---------------+---------------+--------------|
   |     |   5   |      off      |      on       |     off      |
   |-----+-------+---------------+---------------+--------------|
   |     |   4   |      on       |      on       |     off      |
   |-----+-------+---------------+---------------+--------------|
   |     |   3   |      off      |      off      |      on      |
   |-----+-------+---------------+---------------+--------------|
   |     |   2   |      on       |      off      |      on      |
   |-----+-------+---------------+---------------+--------------|
   |     |   1   |      off      |      on       |      on      |
   |-----+-------+---------------+---------------+--------------|
   |     |   0   |      on       |      on       |      on      |
   +------------------------------------------------------------+