ADVANCED COMPUTER TECHNOLOGY, LTD.
==================================

   T386-25/HS

   Processor             80386DX                                  
   Processor Speed       25MHz                                    
   Chip Set              ACT                                      
   Max. Onboard DRAM     16MB                                     
   Cache                 None                                     
   BIOS                  AMI                                      
   Dimensions            270mm x 220mm                            
   I/O Options           None                                     
   NPU Options           80387/3167                               

<gopher://bitreich.org/I/th99/m/A-B/30281-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | Turbo LED           |   JP3    | Reset switch   |   JP14   |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |   JP10   | Speaker        |   JP19   |
   |---------------------+----------+----------------+----------|
   | External battery    |   JP11   | Turbo switch   |   JP20   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Monitor type select CGA          |  JP6   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select              |  JP6   | pins 1 & 2 |
   |   | EGA/VGA/monochrome               |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Battery select internal          |  JP12  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Battery select external          |  JP12  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Power good signal detect from    |  JP13  | pins 1 & 2 |
   |   | power supply                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Power good signal detect from    |  JP13  | pins 2 & 3 |
   |   | CPU                              |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | DRAM select fast refresh         |  JP15  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | DRAM select normal refresh       |  JP15  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Parity check enabled             |  JP16  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Parity check disabled            |  JP16  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |    Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
   |------+--------------+------------+------------+------------|
   | 1MB  |  (1) 256K x  |    NONE    |    NONE    |    NONE    |
   |      |      36      |            |            |            |
   |------+--------------+------------+------------+------------|
   | 1MB  |     NONE     |    NONE    | (4) 256K x |    NONE    |
   |      |              |            |     9      |            |
   |------+--------------+------------+------------+------------|
   | 2MB  |  (1) 256K x  | (1) 256K x |    NONE    |    NONE    |
   |      |      36      |     36     |            |            |
   |------+--------------+------------+------------+------------|
   | 2MB  |     NONE     |    NONE    | (4) 256K x | (4) 256K x |
   |      |              |            |     9      |     9      |
   |------+--------------+------------+------------+------------|
   | 3MB  |  (1) 256K x  | (1) 256K x | (4) 256K x |    NONE    |
   |      |      36      |     36     |     9      |            |
   |------+--------------+------------+------------+------------|
   | 4MB  |  (1) 256K x  | (1) 256K x | (4) 256K x | (4) 256K x |
   |      |      36      |     36     |     9      |     9      |
   |------+--------------+------------+------------+------------|
   | 6MB  |  (1) 256K x  | (1) 256K x | (4) 1M x 9 |    NONE    |
   |      |      36      |     36     |            |            |
   |------+--------------+------------+------------+------------|
   | 10MB |  (1) 256K x  | (1) 256K x | (4) 1M x 9 | (4) 1M x 9 |
   |      |      36      |     36     |            |            |
   |------+--------------+------------+------------+------------|
   | 16MB |     NONE     |    NONE    | (4) 4M x 9 |    NONE    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Size   |   JP17   |   JP18   |   JP21   |  JP30  |  JP33  |
   |---------+----------+----------+----------+--------+--------|
   |   1MB   |  2 & 3   |  2 & 3   |  2 & 3   | 2 & 3  | 2 & 3  |
   |---------+----------+----------+----------+--------+--------|
   |   1MB   |  2 & 3   |  2 & 3   |  1 & 2   | 1 & 2  | 1 & 2  |
   |---------+----------+----------+----------+--------+--------|
   |   2MB   |  2 & 3   |  2 & 3   |  2 & 3   | 2 & 3  | 2 & 3  |
   |---------+----------+----------+----------+--------+--------|
   |   2MB   |  2 & 3   |  2 & 3   |  1 & 2   | 1 & 2  | 1 & 2  |
   |---------+----------+----------+----------+--------+--------|
   |   3MB   |  2 & 3   |  2 & 3   |  2 & 3   | 2 & 3  | 2 & 3  |
   |---------+----------+----------+----------+--------+--------|
   |   4MB   |  2 & 3   |  2 & 3   |  2 & 3   | 2 & 3  | 2 & 3  |
   |---------+----------+----------+----------+--------+--------|
   |   6MB   |  2 & 3   |  2 & 3   |  2 & 3   | 2 & 3  | 2 & 3  |
   |---------+----------+----------+----------+--------+--------|
   |  10MB   |  2 & 3   |  2 & 3   |  2 & 3   | 2 & 3  | 2 & 3  |
   |---------+----------+----------+----------+--------+--------|
   |  16MB   |  1 & 2   |  1 & 2   |  1 & 2   | 1 & 2  | 1 & 2  |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM SWITCH CONFIGURATION                  |
   |------------------------------------------------------------|
   | Size  | SW1/3  | SW1/4  | SW1/5  | SW1/6  | SW1/7  | SW1/8 |
   |-------+--------+--------+--------+--------+--------+-------|
   |  1MB  |  Off   |  Off   |  Off   |  Off   |  Off   |  Off  |
   |-------+--------+--------+--------+--------+--------+-------|
   |  1MB  |  Off   |  Off   |  Off   |  Off   |  Off   |  Off  |
   |-------+--------+--------+--------+--------+--------+-------|
   |  2MB  |  Off   |  Off   |   On   |  Off   |  Off   |  On   |
   |-------+--------+--------+--------+--------+--------+-------|
   |  2MB  |  Off   |  Off   |   On   |  Off   |  Off   |  On   |
   |-------+--------+--------+--------+--------+--------+-------|
   |  3MB  |  Off   |  Off   |   On   |  Off   |   On   |  Off  |
   |-------+--------+--------+--------+--------+--------+-------|
   |  4MB  |   On   |   On   |   On   |  Off   |   On   |  On   |
   |-------+--------+--------+--------+--------+--------+-------|
   |  6MB  |  Off   |  Off   |   On   |   On   |   On   |  Off  |
   |-------+--------+--------+--------+--------+--------+-------|
   | 10MB  |  Off   |   On   |   On   |   On   |   On   |  On   |
   |-------+--------+--------+--------+--------+--------+-------|
   | 16MB  |  Off   |  Off   |  Off   |   On   |  Off   |  Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               DRAM WAIT STATE CONFIGURATION                |
   |------------------------------------------------------------|
   |              Size               |    SW1/1    |   SW1/2    |
   |---------------------------------+-------------+------------|
   | Refresh select 1 per wait state |     Off     |    Off     |
   |---------------------------------+-------------+------------|
   | Refresh select 2 per wait state |     Off     |     On     |
   |---------------------------------+-------------+------------|
   | Refresh select 4 per wait state |     On      |    Off     |
   |---------------------------------+-------------+------------|
   | Refresh select 8 per wait state |     On      |     On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     NPU CONFIGURATION                      |
   |------------------------------------------------------------|
   |       Type       |        JP2         |        JP4         |
   |------------------+--------------------+--------------------|
   |      80387       | pins 1 & 2 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |       3167       | pins 2 & 3 closed  | pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |     Disabled     | pins 1 & 2 closed  | pins 1 & 2 closed  |
   +------------------------------------------------------------+