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

   DTC2280E (400521-89A)

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

<gopher://bitreich.org/I/th99/c/C-D/20833-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                Function                |     Location      |
   |----------------------------------------+-------------------|
   | 25-pin parallel port - external        |        J1         |
   |----------------------------------------+-------------------|
   | 9-pin serial port 1 - external         |        J2         |
   |----------------------------------------+-------------------|
   | 10-pin serial port 2 - internal        |        J3         |
   |----------------------------------------+-------------------|
   | 16-pin game port - internal            |        J4         |
   |----------------------------------------+-------------------|
   | 34-pin cable connector - floppy drive  |        J5         |
   |----------------------------------------+-------------------|
   | 2-pin connector - drive active LED     |        J6         |
   |----------------------------------------+-------------------|
   | 40-pin IDE(AT) interface connector     |        J7         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Game port enabled              |    W1    |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Game port disabled             |    W1    |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive interrupt IRQ14     |   W15    | pins 1 & 2 |
   |   | select                         |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive interrupt IRQ15     |   W15    | pins 2 & 3 |
   |   | select                         |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | IDE(AT) interface address is   |   W17    | pins 1 & 2 |
   |   | 1F0h                           |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | IDE(AT) interface address is   |   W17    | pins 2 & 3 |
   |   | 170h                           |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | IDE(AT) interface enabled      |   W18    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | IDE(AT) interface disabled     |   W18    | pins 1 & 2 |
   |   |                                |          |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 1 CONFIGURATION                 |
   |------------------------------------------------------------|
   |     Port 1     |         W21         |         W22         |
   |----------------+---------------------+---------------------|
   |>> |    COM1    |  pins 1 & 2 closed  |  pins 2 & 3 closed  |
   |---+------------+---------------------+---------------------|
   |   |    COM3    |  pins 2 & 3 closed  |  pins 1 & 2 closed  |
   |---+------------+---------------------+---------------------|
   |   |  Disabled  |  pins 1 & 2 closed  |  pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 2 CONFIGURATION                 |
   |------------------------------------------------------------|
   |     Port 2     |         W23         |         W24         |
   |----------------+---------------------+---------------------|
   |>> |    COM2    |  pins 1 & 2 closed  |  pins 2 & 3 closed  |
   |---+------------+---------------------+---------------------|
   |   |    COM4    |  pins 2 & 3 closed  |  pins 1 & 2 closed  |
   |---+------------+---------------------+---------------------|
   |   |  Disabled  |  pins 1 & 2 closed  |  pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            PARALLEL PORT ADDRESS CONFIGURATION             |
   |------------------------------------------------------------|
   |      LPT       |         W19         |         W20         |
   |----------------+---------------------+---------------------|
   |>> |  1 (378h)  |  pins 2 & 3 closed  |  pins 1 & 2 closed  |
   |---+------------+---------------------+---------------------|
   |   |  2 (278h)  |  pins 1 & 2 closed  |  pins 2 & 3 closed  |
   |---+------------+---------------------+---------------------|
   |   |  3 ( BCh)  |  pins 2 & 3 closed  |  pins 2 & 3 closed  |
   |---+------------+---------------------+---------------------|
   |   |  Disabled  |  pins 1 & 2 closed  |  pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 1 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |      IRQ       |     W12      |     W13      |     W14     |
   |----------------+--------------+--------------+-------------|
   |>> |    IRQ4    |     open     |     open     |   closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ3    |     open     |    closed    |    open     |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ5    |    closed    |     open     |    open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 2 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |      IRQ       |      W9      |     W10      |     W11     |
   |----------------+--------------+--------------+-------------|
   |>> |    IRQ3    |     open     |     open     |   closed    |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ4    |     open     |    closed    |    open     |
   |---+------------+--------------+--------------+-------------|
   |   |    IRQ5    |    closed    |     open     |    open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |         IRQ          |        W7        |        W8        |
   |----------------------+------------------+------------------|
   |>>    |       7       |       open       |      closed      |
   |------+---------------+------------------+------------------|
   |      |       5       |      closed      |       open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PARALLEL PORT MODE CONFIGURATION              |
   |------------------------------------------------------------|
   |      MODE       |         W16         |        W25         |
   |-----------------+---------------------+--------------------|
   |>>   |  Printer  |  pins 2 & 3 closed  | pins 2 & 3 closed  |
   |-----+-----------+---------------------+--------------------|
   |     |  ECP/EPP  |  pins 2 & 3 closed  | pins 1 & 2 closed  |
   |-----+-----------+---------------------+--------------------|
   |     |    EPP    |  pins 1 & 2 closed  | pins 2 & 3 closed  |
   |------------------------------------------------------------|
   | Note: You must select a DMA channel when using ECP mode.   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       DMA SELECTION                        |
   |------------------------------------------------------------|
   |  CHANNEL   |    W3     |    W4     |    W5     |    W6     |
   |------------+-----------+-----------+-----------+-----------|
   |     1      |  closed   |   open    |  closed   |   open    |
   |------------+-----------+-----------+-----------+-----------|
   |     3      |   open    |  closed   |   open    |  closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | The floppy controller in automatically configured: When a  |
   |     cable is attached, it is enabled, when no cable is     |
   |                  attached it is disabled.                  |
   +------------------------------------------------------------+