UNIDENTIFIED
============

   AB-757

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 16-bit, ISA                            |
   |-------------------+----------------------------------------|
   | Size:             | Half-length, full-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/U-Z/20397-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                    |  Location  |
   |-----------------------------------------------+------------|
   | 40-pin IDE(AT) Interface connector            |    JP1     |
   |-----------------------------------------------+------------|
   | 2-pin connector - Drive active LED            |    JP2     |
   |-----------------------------------------------+------------|
   | 34-pin control cable connector - floppy drive |    JP9     |
   |-----------------------------------------------+------------|
   | 15-pin game port - internal                   |    JP10    |
   |-----------------------------------------------+------------|
   | 10-pin serial port (COM2/3/4) - internal      |    JP11    |
   |-----------------------------------------------+------------|
   | 10-pin serial port (COM1/3/4) - external      |    JP12    |
   |-----------------------------------------------+------------|
   | 25-pin parallel port (LPT1/2/3) - external    |    JP13    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |          Function           |   Location   |    Setting    |
   |-----------------------------+--------------+---------------|
   |>> | Hard drive enabled      | JP7/jumper 4 |  pins 2 & 3   |
   |   |                         |              |    closed     |
   |---+-------------------------+--------------+---------------|
   |   | Hard drive disabled     | JP7/jumper 4 |  pins 1 & 2   |
   |   |                         |              |    closed     |
   |---+-------------------------+--------------+---------------|
   |>> | Floppy drive enabled    | JP7/jumper 5 |  pins 2 & 3   |
   |   |                         |              |    closed     |
   |---+-------------------------+--------------+---------------|
   |   | Floppy drive disabled   | JP7/jumper 5 |  pins 1 & 2   |
   |   |                         |              |    closed     |
   |---+-------------------------+--------------+---------------|
   |>> | IBM BIOS enabled        |     JP5      |  pins 2 & 3   |
   |   |                         |              |    closed     |
   |---+-------------------------+--------------+---------------|
   |   | Other BIOS type enabled |     JP5      |  pins 1 & 2   |
   |   |                         |              |    closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Location   |  Setting   |
   |--------------------------------+--------------+------------|
   |>> | Parallel Port is           |     JP4      |   closed   |
   |   | uni-directional            |              |            |
   |---+----------------------------+--------------+------------|
   |   | Parallel Port is           |     JP4      |    open    |
   |   | bi-directional             |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive port address  | JP7/jumper 3 | pins 1 & 2 |
   |   | is 3F0-3F7h                |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive port address  | JP7/jumper 3 | pins 2 & 3 |
   |   | is 370-377h                |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | Hard drive port address is | JP7/jumper 1 | pins 1 & 2 |
   |   | 1F0-1F7,3F6 & 3F7h         |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Hard drive port address is | JP7/jumper 1 | pins 2 & 3 |
   |   | 170-177, 376 & 377h        |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive booting       | JP7/jumper 2 | pins 2 & 3 |
   |   | sequence is A:/B:          |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive booting       | JP7/jumper 2 | pins 1 & 2 |
   |   | sequence is B:/A:          |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | AT-compatible mode enabled | JP7/jumper 6 | pins 2 & 3 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | XT-compatible mode enabled | JP7/jumper 6 | pins 1 & 2 |
   |   |                            |              |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Port 1 (JP12)   |    JP6/jumper 1    |    JP6/jumper 2    |
   |------------------+--------------------+--------------------|
   |>>  |    COM1     | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   |----+-------------+--------------------+--------------------|
   |    |    COM3     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   |----+-------------+--------------------+--------------------|
   |    |    COM4     | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   |----+-------------+--------------------+--------------------|
   |    |  Disabled   | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT INTERRUPT SELECT                |
   |------------------------------------------------------------|
   | Port 1 (JP12) | JP8/jumper 1 | JP8/jumper 2 | JP8/jumper 3 |
   |---------------+--------------+--------------+--------------|
   |>>    |  IRQ4  |    Closed    |     Open     |     Open     |
   |------+--------+--------------+--------------+--------------|
   |      |  IRQ3  |     Open     |    Closed    |     Open     |
   |------+--------+--------------+--------------+--------------|
   |      |  IRQ5  |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Port 2 (JP11)   |    JP6/jumper 3    |    JP6/jumper 4    |
   |------------------+--------------------+--------------------|
   |>>  |    COM2     | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   |----+-------------+--------------------+--------------------|
   |    |    COM3     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   |----+-------------+--------------------+--------------------|
   |    |    COM4     | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   |----+-------------+--------------------+--------------------|
   |    |  Disabled   | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT INTERRUPT SELECT                |
   |------------------------------------------------------------|
   | Port 2 (JP11) | JP8/jumper 4 | JP8/jumper 5 | JP8/jumper 6 |
   |---------------+--------------+--------------+--------------|
   |>>    |  IRQ3  |    Closed    |     Open     |     Open     |
   |------+--------+--------------+--------------+--------------|
   |      |  IRQ4  |     Open     |    Closed    |     Open     |
   |------+--------+--------------+--------------+--------------|
   |      |  IRQ5  |     Open     |     Open     |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                PARALLEL PORT CONFIGURATION                 |
   |------------------------------------------------------------|
   |       LPT        |    JP6/jumper 5    |    JP6/jumper 6    |
   |------------------+--------------------+--------------------|
   |>> |     LPT1     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     LPT2     | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |     LPT3     | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   Disabled   | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               PARALLEL PORT INTERRUPT SELECT               |
   |------------------------------------------------------------|
   |       IRQ        |    JP8/jumper 7    |    JP8/jumper 8    |
   |------------------+--------------------+--------------------|
   |>> |     IRQ7     |       Closed       |        Open        |
   |---+--------------+--------------------+--------------------|
   |   |     IRQ5     |        Open        |       Closed       |
   +------------------------------------------------------------+