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

   DTC3280A, DTC3280AS (400480-89XX)

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

   Data bus:  16-bit, ISA.

   Size:  Half-length, full-height card.

   Hard drives supported:  Up to seven SCSI devices

   Floppy drives supported:  DTC3180A: None

   DTC3280A: Four 360KB, 720KB, 1.2MB or 1.44 MB drives

<gopher://bitreich.org/I/th99/c/C-D/20059-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 50-pin SCSI connector-external                  |    J1    |
   |-------------------------------------------------+----------|
   | 50-pin SCSI connector-internal                  |    J2    |
   |-------------------------------------------------+----------|
   | 34-pin data cable connector-floppy drive        |    J3    |
   | (DTC3280A and AS only)                          |          |
   |-------------------------------------------------+----------|
   | 4-pin connector-drive active LED                |    J4    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Location   |  Setting   |
   |--------------------------------+--------------+------------|
   |>> | Single-speed floppy        | SW1/switch 7 |    off     |
   |   | supported                  |              |            |
   |---+----------------------------+--------------+------------|
   |   | Dual-speed floppy          | SW1/switch 7 |     on     |
   |   | supported                  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | PS/2-type floppy on Drive  | SW1/switch 8 |     on     |
   |   | Select 2 not supported     |              |            |
   |---+----------------------------+--------------+------------|
   |   | PS/2-type floppy drive on  | SW1/switch 8 |    off     |
   |   | Drive Select 2 supported   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive precomp. is   | SW1/switch 9 |    off     |
   |   | scaled by data rate:       |              |            |
   |   |                            |              |            |
   |   | 500KHz=125ns,              |              |            |
   |   | 300KHz=208ns, 250KHz=250ns |              |            |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive               | SW1/switch 9 |     on     |
   |   | precompensation is 125ns   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive enabled       |  SW1/switch  |     on     |
   |   |                            |      10      |            |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive disabled      |  SW1/switch  |    off     |
   |   |                            |      10      |            |
   |---+----------------------------+--------------+------------|
   |>> | Factory configured - do    | SW2/switch 3 |    off     |
   |   | not alter                  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Factory configured - do    | SW2/switch 4 |    off     |
   |   | not alter                  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | SCSI parity check enabled  | SW2/switch 5 |    off     |
   |---+----------------------------+--------------+------------|
   |   | SCSI parity check disabled | SW2/switch 5 |     on     |
   |---+----------------------------+--------------+------------|
   |>> | 2KB SRAM selected          |      W1      | pins 2 & 3 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | 8KB SRAM selected          |      W1      | pins 1 & 2 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive address       |      W2      | pins 1 & 2 |
   |   | 3F2-3F7h                   |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive address       |      W2      | pins 2 & 3 |
   |   | 372-377h                   |              |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           INQUIRY INTERRUPT REQUEST "B " OPTIONS           |
   |------------------------------------------------------------|
   |   IRQ    |SW1/switch 1|SW1/switch 2|SW1/switch |SW1/switch |
   |          |            |            |     3     |     4     |
   |----------+------------+------------+-----------+-----------|
   |>>| IRQ11  |    off     |    off     |    on     |    off    |
   |-+--------+------------+------------+-----------+-----------|
   | | IRQ10  |    off     |    off     |    off    |    on     |
   |-+--------+------------+------------+-----------+-----------|
   | | IRQ12  |    off     |     on     |    off    |    off    |
   |-+--------+------------+------------+-----------+-----------|
   | | IRQ15  |     on     |    off     |    off    |    off    |
   |-+--------+------------+------------+-----------+-----------|
   | |Disabled|    off     |    off     |    off    |    off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |     Address      |    SW1/switch 5    |    SW1/switch 6    |
   |------------------+--------------------+--------------------|
   |>> |    D800h     |        off         |        off         |
   |---+--------------+--------------------+--------------------|
   |   |    C800h     |        off         |         on         |
   |---+--------------+--------------------+--------------------|
   |   |    DC00h     |         on         |        off         |
   |---+--------------+--------------------+--------------------|
   |   |    CC00h     |         on         |         on         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     INTERRUPT REQUEST                      |
   |------------------------------------------------------------|
   |       IRQ        |    SW2/switch 1    |    SW2/switch 2    |
   |------------------+--------------------+--------------------|
   |>> |    IRQ11     |        off         |         on         |
   |---+--------------+--------------------+--------------------|
   |   |    IRQ12     |         on         |        off         |
   |---+--------------+--------------------+--------------------|
   |   |    IRQ10     |         on         |         on         |
   |---+--------------+--------------------+--------------------|
   |   |    IRQ15     |        off         |        off         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SCSI ADDRESS                        |
   |------------------------------------------------------------|
   |  SCSI ID   | SW2/switch 6  | SW2/switch 7  | SW2/switch 8  |
   |------------+---------------+---------------+---------------|
   |    |   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      |
   +------------------------------------------------------------+