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

   DTC2280 (400485-89A)

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 16-bit, ISA                            |
   |-------------------+----------------------------------------|
   | Size:             | Half-length, half-height card          |
   |-------------------+----------------------------------------|
   | Hard drive        | Two IDE (AT) Interface drives          |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | Two 360KB, 720KB, 1.2MB, or 1.44MB     |
   | supported:        | drives                                 |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/C-D/20396-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                    |  Location  |
   |-----------------------------------------------+------------|
   | 34-pin control cable connector - floppy drive |     J1     |
   |-----------------------------------------------+------------|
   | 40-pin IDE(AT) Interface connector            |     J2     |
   |-----------------------------------------------+------------|
   | 16-pin game port - internal                   |     J3     |
   |-----------------------------------------------+------------|
   | 10-pin serial port (COM1/3/4) - internal      |     J4     |
   |-----------------------------------------------+------------|
   | 10-pin serial port (COM2/3/4) - internal      |     J6     |
   |-----------------------------------------------+------------|
   | 25-pin parallel port (LPT1/2/3) - external    |     J7     |
   |-----------------------------------------------+------------|
   | 2-pin connector - Drive active LED            |    JP1     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Parallel port is               |   JP3    |   closed   |
   |   | uni-directional                |          |            |
   |---+--------------------------------+----------+------------|
   |   | Parallel port is               |   JP3    |    open    |
   |   | bi-directional                 |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive port address is     |  JP4/A   | pins 2 & 3 |
   |   | 3F6-3F7, 1F0-1F7h              |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive port address is     |  JP4/A   | pins 1 & 2 |
   |   | 376-377, 170-177h              |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive enabled             |  JP4/B   | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive disabled            |  JP4/B   | pins 2 & 3 |
   |   |                                |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           USER CONFIGURABLE SETTINGS (CONTINUED)           |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Floppy drive port address is   |  JP4/C   | pins 2 & 3 |
   |   | 3F0-3F7h                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive port address is   |  JP4/C   | pins 1 & 2 |
   |   | 370-377h                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive enabled           |  JP4/D   | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive disabled          |  JP4/D   | pins 2 & 3 |
   |   |                                |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 1 (J4) CONFIGURATION              |
   |------------------------------------------------------------|
   |       COM        |       JP2/A        |       JP2/B        |
   |------------------+--------------------+--------------------|
   |>> |     COM1     | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     COM3     | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     COM4     | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 2 (J6) CONFIGURATION              |
   |------------------------------------------------------------|
   |       COM        |       JP2/C        |       JP2/D        |
   |------------------+--------------------+--------------------|
   |>> |     COM2     | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     COM3     | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     COM4     | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PARALLEL PORT (J7) CONFIGURATION              |
   |------------------------------------------------------------|
   |       LPT        |       JP2/E        |       JP2/F        |
   |------------------+--------------------+--------------------|
   |>> |     LPT1     | pins 2 & 3 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     LPT2     | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     LPT3     | pins 1 & 2 closed  | pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | pins 2 & 3 closed  | pins 2 & 3 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            SERIAL PORT 1 (J4) INTERRUPT REQUEST            |
   |------------------------------------------------------------|
   |       IRQ       |     J5/A     |    J5/B     |    J5/C     |
   |-----------------+--------------+-------------+-------------|
   |>>  |    IRQ4    |    closed    |    open     |    open     |
   |----+------------+--------------+-------------+-------------|
   |    |    IRQ3    |     open     |   closed    |    open     |
   |----+------------+--------------+-------------+-------------|
   |    |    IRQ5    |     open     |    open     |   closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            SERIAL PORT 2 (J6) INTERRUPT REQUEST            |
   |------------------------------------------------------------|
   |       IRQ       |     J5/D     |    J5/E     |    J5/F     |
   |-----------------+--------------+-------------+-------------|
   |>>  |    IRQ3    |    closed    |    open     |    open     |
   |----+------------+--------------+-------------+-------------|
   |    |    IRQ4    |     open     |   closed    |    open     |
   |----+------------+--------------+-------------+-------------|
   |    |    IRQ5    |     open     |    open     |   closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            PARALLEL PORT (J7) INTERRUPT REQUEST            |
   |------------------------------------------------------------|
   |          IRQ           |      J5/G       |      J5/H       |
   |------------------------+-----------------+-----------------|
   |>>    |      IRQ7       |     closed      |      open       |
   |------+-----------------+-----------------+-----------------|
   |      |      IRQ5       |      open       |     closed      |
   +------------------------------------------------------------+