DATA TECHNOLOGY CORPORATION
===========================

   DTC3250

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

   Data bus: 8-bit, ISA

   Size: Half-length, full-height card

   Hard drives supported:  Up to seven SCSI devices

   Floppy drives supported: Three 360KB or 720KB

<gopher://bitreich.org/I/th99/c/C-D/20058-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector-internal           |       CN1       |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector-external           |       CN2       |
   |------------------------------------------+-----------------|
   | 34-pin data cable connector-floppy drive |       CN3       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |     Address      |    SW2/switch 5    |    SW2/switch 6    |
   |------------------+--------------------+--------------------|
   |>> |    D800h     |        off         |        off         |
   |---+--------------+--------------------+--------------------|
   |   |    DC00h     |         on         |        off         |
   |---+--------------+--------------------+--------------------|
   |   |    C800h     |        off         |         on         |
   |---+--------------+--------------------+--------------------|
   |   |    CC00h     |         on         |         on         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Location   |  Setting   |
   |--------------------------------+--------------+------------|
   |>> | Floppy port address        |     JP1      | pins 1 & 2 |
   |   | 3F2-3F7h                   |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Floppy port address        |     JP1      | pins 2 & 3 |
   |   | 372-377h                   |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | Normal operation           |     JP2      | pins 2 & 3 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Factory test enabled       |     JP2      | pins 1 & 2 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | SCSI parity check disabled | SW1/switch 3 |     on     |
   |---+----------------------------+--------------+------------|
   |   | SCSI parity check enabled  | SW1/switch 3 |    off     |
   |---+----------------------------+--------------+------------|
   |>> | Dual-speed floppy          | SW2/switch 7 |     on     |
   |   | supported                  |              |            |
   |---+----------------------------+--------------+------------|
   |   | Single-speed floppy        | SW2/switch 7 |    off     |
   |   | supported                  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | PS/2-type floppy on Drive  | SW2/switch 8 |     on     |
   |   | Select 2 not supported     |              |            |
   |---+----------------------------+--------------+------------|
   |   | PS/2-type floppy drive on  | SW2/switch 8 |    off     |
   |   | Drive Select 2 supported   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive disabled      | SW2/switch 9 |    off     |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive enabled       | SW2/switch 9 |     on     |
   |---+----------------------------+--------------+------------|
   |>> | Normal operation mode      |  SW2/switch  |    off     |
   |   |                            |      10      |            |
   |---+----------------------------+--------------+------------|
   |   | Factory test enabled       |  SW2/switch  |     on     |
   |   |                            |      10      |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          INTERRUPT REQUEST SWITCHES - SW1 AND SW2          |
   |------------------------------------------------------------|
   |   |INTERRUPT "A"|INQUIRY INTERRUPT |                       |
   |   |             |       "B"        |                       |
   |---+-------------+------------------+-----------------------|
   | |#|    SW1/1    |      SW1/2       |SW2/1|SW2/2|SW2/3|SW2/4|
   |-+-+-------------+------------------+-----+-----+-----+-----|
   | |4|     on      |        on        | off | off | off | on  |
   |-+-+-------------+------------------+-----+-----+-----+-----|
   | |5|     off     |        on        | off | off | on  | off |
   |-+-+-------------+------------------+-----+-----+-----+-----|
   | |6|     on      |       off        | off | on  | off | off |
   |-+-+-------------+------------------+-----+-----+-----+-----|
   |>>|7|     off     |       off        | on  | off | off | off |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SCSI ADDRESS                        |
   |------------------------------------------------------------|
   |  SCSI ID   | SW1/switch 4  | SW1/switch 5  | SW1/switch 6  |
   |------------+---------------+---------------+---------------|
   |    |   0   |      on       |      on       |      on       |
   |----+-------+---------------+---------------+---------------|
   |    |   1   |      off      |      on       |      on       |
   |----+-------+---------------+---------------+---------------|
   |    |   2   |      on       |      off      |      on       |
   |----+-------+---------------+---------------+---------------|
   |    |   3   |      off      |      off      |      on       |
   |----+-------+---------------+---------------+---------------|
   |    |   4   |      on       |      on       |      off      |
   |----+-------+---------------+---------------+---------------|
   |    |   5   |      off      |      on       |      off      |
   |----+-------+---------------+---------------+---------------|
   |    |   6   |      on       |      off      |      off      |
   |----+-------+---------------+---------------+---------------|
   |>>  |   7   |      off      |      off      |      off      |
   +------------------------------------------------------------+