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

   DTC2278S

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 32-bit VL-Bus                          |
   |-------------------+----------------------------------------|
   | Size:             | Three/quarter-length, half-height card |
   |-------------------+----------------------------------------|
   | Hard drive        | Two IDE(AT) interface drives           |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | Two 360KB, 720KB, 1.2MB, 1.44MB drives |
   | supported:        |                                        |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/C-D/20778-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 10-pin serial port 2 - internal                 |    J2    |
   |-------------------------------------------------+----------|
   | 9-pin serial port 1 - external (via ribbon      |    J3    |
   | cable)                                          |          |
   |-------------------------------------------------+----------|
   | 16-pin game port                                |    J4    |
   |-------------------------------------------------+----------|
   | 34-pin cable connector - floppy drive           |    J5    |
   |-------------------------------------------------+----------|
   | 40-pin connector - secondary IDE(AT) interface  |    J6    |
   |-------------------------------------------------+----------|
   | 40-pin connector - primary IDE(AT) interface    |    J7    |
   |-------------------------------------------------+----------|
   | 4-pin connector - drive active LED              |    J8    |
   |-------------------------------------------------+----------|
   | 25-pin parallel port - external                 |    J9    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Floppy drive interface enabled |    W7    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive interface         |    W7    | pins 1 & 2 |
   |   | disabled                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Game port enabled              |    W8    |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Game port disabled             |    W8    |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Parallel port is               |   W17    |   closed   |
   |   | uni-directional                |          |            |
   |---+--------------------------------+----------+------------|
   |   | Parallel port is               |   W17    |    open    |
   |   | bi-directional                 |          |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PARALLEL PORT ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |       LPT        |         W1         |         W2         |
   |------------------+--------------------+--------------------|
   |>> | LPT1 (378h)  | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   | LPT2 (278h)  | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   | LPT3 (3BCh)  | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 1 & 2 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 1 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |       COM        |         W5         |         W6         |
   |------------------+--------------------+--------------------|
   |>> | COM1 (3F8h)  | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   | COM3 (3E8h)  | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   | COM4 (2E8h)  | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 1 & 2 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 2 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |       COM        |         W3         |         W4         |
   |------------------+--------------------+--------------------|
   |>> | COM2 (2F8h)  | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   | COM3 (3E8h)  | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   | COM4 (2E8h)  | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 1 & 2 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  PARALLEL PORT INTERRUPT                   |
   |------------------------------------------------------------|
   |         IRQ         |        W9         |       W10        |
   |---------------------+-------------------+------------------|
   |>> |      IRQ7       |       open        |      closed      |
   |---+-----------------+-------------------+------------------|
   |   |      IRQ5       |      closed       |       open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT 1 INTERRUPT SELECT               |
   |------------------------------------------------------------|
   |      IRQ       |     W14      |     W15      |     W16     |
   |----------------+--------------+--------------+-------------|
   |>> |    IRQ4    |     open     |     open     |   closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ3    |     open     |    closed    |    open     |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ5    |    closed    |     open     |    open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT 2 INTERRUPT SELECT               |
   |------------------------------------------------------------|
   |      IRQ       |     W11      |     W12      |     W13     |
   |----------------+--------------+--------------+-------------|
   |>> |    IRQ3    |     open     |     open     |   closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ4    |     open     |    closed    |    open     |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ5    |    closed    |     open     |    open     |
   +------------------------------------------------------------+