ABC COMPUTER COMPANY, LTD.
==========================

   COMPACT 286 VER. 2

   Processor          80286                                       
   Processor Speed    20MHz                                       
   Chip Set           C & T                                       
   Max. Onboard DRAM  8MB                                         
   Cache              None                                        
   BIOS               AMI                                         
   Dimensions         330mm x 218mm                               
   I/O Options        None                                        
   NPU Options        80287                                       

<gopher://bitreich.org/I/th99/m/A-B/30073-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Reset switch     |    E5    | Speaker           |   J19    |
   |------------------+----------+-------------------+----------|
   | MIPS counter     |    E7    | Power LED &       |   J21    |
   |                  |          | keylock           |          |
   |------------------+----------+-------------------+----------|
   | External battery |   J17    |                   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Jumper  |  Position  |
   |-------------------------------------+---------+------------|
   |>> | NPU speed select 10MHz          | E1 & E2 | pins 1 & 2 |
   |   |                                 |         |   closed   |
   |---+---------------------------------+---------+------------|
   |   | NPU speed select slow           | E1 & E2 | pins 2 & 3 |
   |   |                                 |         |   closed   |
   |---+---------------------------------+---------+------------|
   |>> | BIOS type select 27128          |   E3    | pins 1 & 2 |
   |   |                                 |         |   closed   |
   |---+---------------------------------+---------+------------|
   |   | BIOS type select 27256          |   E3    | pins 2 & 3 |
   |   |                                 |         |   closed   |
   |---+---------------------------------+---------+------------|
   |>> | CMOS memory normal operation    |   E4    | pins 1 & 2 |
   |   |                                 |         |   closed   |
   |---+---------------------------------+---------+------------|
   |   | CMOS memory clear               |   E4    | pins 2 & 3 |
   |   |                                 |         |   closed   |
   |---+---------------------------------+---------+------------|
   |>> | Reset enabled through hardware  |   E6    | pins 1 & 2 |
   |   | only                            |         |   closed   |
   |---+---------------------------------+---------+------------|
   |   | Reset enabled through hardware  |   E6    | pins 2 & 3 |
   |   | and keyboard                    |         |   closed   |
   |---+---------------------------------+---------+------------|
   |>> | Monitor type select monochrome  |   SW1   | pins 1 & 2 |
   |   |                                 |         |   closed   |
   |---+---------------------------------+---------+------------|
   |   | Monitor type select color       |   SW1   | pins 2 & 3 |
   |   |                                 |         |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |   Bank 0   |   Bank 1   |   Bank 2   |   Bank 3   |
   |--------+------------+------------+------------+------------|
   | 512KB  | (18) 41256 |    NONE    |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   | 640KB  | (18) 41256 | (18) 4164  |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   |  1MB   | (18) 41256 | (18) 41256 |    NONE    |    NONE    |
   |--------+------------+------------+------------+------------|
   | 1.5MB  | (18) 41256 | (18) 41256 | (18) 41256 |    NONE    |
   |--------+------------+------------+------------+------------|
   | 1.64MB | (18) 41256 | (18) 4164  | (18) 41256 | (18) 41256 |
   |--------+------------+------------+------------+------------|
   |  2MB   | (18) 41256 | (18) 41256 | (18) 41256 | (18) 41256 |
   |--------+------------+------------+------------+------------|
   |  2MB   |    (18)    |    NONE    |    NONE    |    NONE    |
   |        |   411000   |            |            |            |
   |--------+------------+------------+------------+------------|
   |  3MB   | (18) 41256 | (18) 41256 |    (18)    |    NONE    |
   |        |            |            |   411000   |            |
   |--------+------------+------------+------------+------------|
   |  4MB   |    (18)    |    (18)    |    NONE    |    NONE    |
   |        |   411000   |   411000   |            |            |
   |--------+------------+------------+------------+------------|
   | 4.64MB | (18) 41256 | (18) 4164  |    (18)    |    (18)    |
   |        |            |            |   411000   |   411000   |
   |--------+------------+------------+------------+------------|
   |  5MB   | (18) 41256 | (18) 41256 |    (18)    |    (18)    |
   |        |            |            |   411000   |   411000   |
   |--------+------------+------------+------------+------------|
   |  6MB   |    (18)    |    (18)    |    (18)    |    NONE    |
   |        |   411000   |   411000   |   411000   |            |
   |--------+------------+------------+------------+------------|
   |  8MB   |    (18)    |    (18)    |    (18)    |    (18)    |
   |        |   411000   |   411000   |   411000   |   411000   |
   |------------------------------------------------------------|
   | Note:Locations of banks within the DRAM area are unknown.  |
   +------------------------------------------------------------+