NEC TECHNOLOGIES, INC.
======================

   APC IV SERIES (G9YAN)

   Processor        80286 (exact location unidentified)           
   Processor Speed  6/8MHz                                        
   Chip Set         Unidentified                                  
   Maximum Onboard  10MB (on external memory cards)               
   Memory           
   Cache            None                                          
   BIOS             Unidentified                                  
   Dimensions       355mm x 305mm                                 
   I/O Options      Floppy drive interface, parallel port, serial 
                    ports (2)                                     
   NPU Options      80287 (exact location unidentified)           

<gopher://bitreich.org/I/th99/m/M-O/33276-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Function      | Label |        Function        | Label |
   |-------------------+-------+------------------------+-------|
   | Serial port 1     | COM1  | Indicator panel        |  P4   |
   |-------------------+-------+------------------------+-------|
   | Serial port 2     | COM2  | Parallel port          |  P5   |
   |-------------------+-------+------------------------+-------|
   | Speaker           |  P1   | Floppy drive interface |  P9   |
   |-------------------+-------+------------------------+-------|
   | External battery  |  P3   | Indicator panel        |  P10  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Setting               | Label  |   Position   |
   |------------------------------------+--------+--------------|
   |>> | ROM area reserved on I/O       |  5N2   | Pins 3 & 6,  |
   |   | channel                        |        | 4 & 5 closed |
   |---+--------------------------------+--------+--------------|
   |   | APC IV ROM at location 4K, 4M  |  5N2   | Pins 1 & 8,  |
   |   | enabled                        |        | 2 & 7 closed |
   |---+--------------------------------+--------+--------------|
   |>> | BIOS type select 27256         |  6N1   | Pins 3 & 6,  |
   |   |                                |        | 4 & 5 closed |
   |---+--------------------------------+--------+--------------|
   |   | BIOS type select 27128         |  6N1   | Pins 1 & 8,  |
   |   |                                |        | 2 & 7 closed |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    | 14D/3  |     Off      |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Parallel port enabled          | 14D/4  |      On      |
   |---+--------------------------------+--------+--------------|
   |   | Parallel port disabled         | 14D/4  |     Off      |
   |---+--------------------------------+--------+--------------|
   |>> | Serial port channel 1 enabled  | 14D/5  |      On      |
   |---+--------------------------------+--------+--------------|
   |   | Serial port channel 1 disabled | 14D/5  |     Off      |
   |---+--------------------------------+--------+--------------|
   |>> | Serial port channel 2 enabled  | 14D/6  |      On      |
   |---+--------------------------------+--------+--------------|
   |   | Serial port channel 2 disabled | 14D/6  |     Off      |
   |---+--------------------------------+--------+--------------|
   |>> | Channel 1 = COM1/channel 2 =   | 14D/7  |      On      |
   |   | COM2                           |        |              |
   |---+--------------------------------+--------+--------------|
   |   | Channel 1 = COM2/channel 2 =   | 14D/7  |     Off      |
   |   | COM1                           |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Monitor type select color      | 14D/10 |      On      |
   |---+--------------------------------+--------+--------------|
   |   | Monitor type select monochrome | 14D/10 |     Off      |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    | 21D/1  |      On      |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    | 21D/2  |      On      |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    | 21D/3  |      On      |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    | 21D/4  |      On      |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    | 21D/5  |      On      |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | ROM type select IBM            | 21D/6  |      On      |
   |---+--------------------------------+--------+--------------|
   |   | ROM type select APC            | 21D/6  |     Off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                            DRAM                            |
   |------------------------------------------------------------|
   | Note: The orientation and location of the DRAM is          |
   | unidentified.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        DRAM JUMPER                         |
   |------------------------------------------------------------|
   |      Bank 0       |      Bank 0       |        18K2        |
   |-------------------+-------------------+--------------------|
   |       256KB       |       64KB        | Pins 3 & 4 closed  |
   |-------------------+-------------------+--------------------|
   |       256KB       |       None        | Pins 1 & 2 closed  |
   |-------------------+-------------------+--------------------|
   |       256KB       |       256KB       |        Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SERIAL PORT                         |
   |------------------------------------------------------------|
   |     Setting     |  14D/1   |  14D/2   |  14D/8   |  14D/9  |
   |-----------------+----------+----------+----------+---------|
   | RS-232 enabled  |    On    |   Off    |    On    |   Off   |
   |-----------------+----------+----------+----------+---------|
   | RS-232 disabled |   Off    |    On    |   Off    |   On    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          I/O WAIT                          |
   |------------------------------------------------------------|
   |            Setting            |            22H1            |
   |-------------------------------+----------------------------|
   |  Normal operation 8-bit I/O   | Pins 3 & 10, 4 & 9 closed  |
   |      cycle with 4 waits       |                            |
   |-------------------------------+----------------------------|
   |   3 wait I/O cycle with I/O   | Pins 2 & 11, 4 & 9 closed  |
   |  address between 000 & 0FF.   |                            |
   |-------------------------------+----------------------------|
   |   2 wait I/O cycle with I/O   | Pins 3 & 10, 5 & 8 closed  |
   |  address between 000 & 0FF.   |                            |
   |------------------------------------------------------------|
   |      Note: Pins 6 & 7 open for normal operation. Close     |
   |      only for early detection or RAS & ALE signals. Pins 1 |
   |      & 12 open for normal operation (1 wait state). Close  |
   |      only for 0 wait states.                               |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/m/M-O/33276-2.png>
   

   +------------------------------------------------------------+
   |                            DRAM                            |
   |------------------------------------------------------------|
   | Note: The orientation and chip sizes are unidentified.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    MEMORY CARD SWITCHES                    |
   |------------------------------------------------------------|
   |  Expansion cards   | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 |
   |     installed      |       |       |       |       |       |
   |--------------------+-------+-------+-------+-------+-------|
   |         1          |  Off  |  Off  |  Off  |  On   |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         2          |  Off  |  Off  |  On   |  On   |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         3          |  Off  |  On   |  Off  |  On   |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         4          |  Off  |  On   |  On   |  On   |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         5          |  On   |  Off  |  Off  |  On   |  Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MEMORY CARD SWITCHES (CON'T)                |
   |------------------------------------------------------------|
   |  Expansion cards  | SW1/6 | SW1/7 | SW1/8 | SW1/9 | SW1/10 |
   |     installed     |       |       |       |       |        |
   |-------------------+-------+-------+-------+-------+--------|
   |         1         |  Off  |  Off  |  Off  |  On   |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         2         |  Off  |  Off  |  On   |  On   |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         3         |  Off  |  On   |  Off  |  On   |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         4         |  Off  |  On   |  On   |  On   |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         5         |  On   |  Off  |  Off  |  On   |   On   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MEMORY CARD SWITCHES (CON'T)                |
   |------------------------------------------------------------|
   |  Expansion cards   | SW2/1 | SW2/2 | SW2/3 | SW2/4 | SW2/5 |
   |     installed      |       |       |       |       |       |
   |--------------------+-------+-------+-------+-------+-------|
   |         1          |  Off  |  Off  |  On   |  Off  |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         2          |  Off  |  On   |  Off  |  Off  |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         3          |  Off  |  On   |  On   |  Off  |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         4          |  On   |  Off  |  Off  |  Off  |  Off  |
   |--------------------+-------+-------+-------+-------+-------|
   |         5          |  On   |  Off  |  On   |  Off  |  Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MEMORY CARD SWITCHES (CON'T)                |
   |------------------------------------------------------------|
   |  Expansion cards  | SW2/6 | SW2/7 | SW2/8 | SW2/9 | SW2/10 |
   |     installed     |       |       |       |       |        |
   |-------------------+-------+-------+-------+-------+--------|
   |         1         |  Off  |  Off  |  On   |  Off  |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         2         |  Off  |  On   |  Off  |  Off  |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         3         |  Off  |  On   |  On   |  Off  |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         4         |  On   |  Off  |  Off  |  Off  |   On   |
   |-------------------+-------+-------+-------+-------+--------|
   |         5         |  On   |  Off  |  On   |  Off  |   On   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MISCELLANEOUS TECHNICAL NOTE                |
   |------------------------------------------------------------|
   | The location of pin 1 on all jumpers is unidentified.      |
   +------------------------------------------------------------+