(TXT) View Source
       
       # ADVANCED COMPUTER TECHNOLOGY, LTD.
       
          LAT-25/4M, LAT-16/4M, LAT-12/4M
       
          Processor             80286                                    
          Processor Speed       12/16/25MHz                              
          Chip Set              ACT                                      
          Max. Onboard DRAM     4MB                                      
          Cache                 None                                     
          BIOS                  AMI                                      
          Dimensions            330mm x 218mm                            
          I/O Options           None                                     
          NPU Options           80287                                    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | Turbo LED         |   JP2    | External battery |   JP11   |
          |-------------------+----------+------------------+----------|
          | Power LED &       |   JP7    | Speaker          |   JP14   |
          | Keylock           |          |                  |          |
          |-------------------+----------+------------------+----------|
          | Reset switch      |   JP10   | Turbo switch     |   JP19   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |           Function            | Jumper/Switch |  Position  |
          |-------------------------------+---------------+------------|
          | » | Factory configured - do   |      JP4      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | BIOS type select 27256    |      JP6      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | ROM type select 27512     |      JP6      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |      JP8      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Monitor type select color |      JP9      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Monitor type select       |      JP9      | pins 1 & 2 |
          |   | monochrome                |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Battery select internal   |     JP12      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Battery select external   |     JP12      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Power good signal detect  |     JP13      | pins 1 & 2 |
          |   | from power supply         |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Power good signal detect  |     JP13      | pins 2 & 3 |
          |   | from board                |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     JP15      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     JP16      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Bus speed select 8MHz     |     JP17      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Bus speed select 6MHz     |     JP17      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     JP18      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Parity check enabled      |     JP20      | pins 1 & 2 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Parity check disabled     |     JP20      | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     JP21      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |     JP22      |    N/A     |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | RAM speed select 0 wait   |     SW1/4     |    Off     |
          |   | states                    |               |            |
          |---+---------------------------+---------------+------------|
          |   | RAM speed select 1 wait   |     SW1/4     |     On     |
          |   | state                     |               |            |
          |------------------------------------------------------------|
          | Note:SW1/4 must be on for the LAT-25/4M model.             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  | Bank 0 | Bank 1 | Bank 2 | Bank  |  P-0   |  P-1   |
          |       |        |        |        |   3   |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          | 512KB |  (4)   |  NONE  |  NONE  | NONE  |  (2)   |  NONE  |
          |       | 44256  |        |        |       | 41256  |        |
          |-------+--------+--------+--------+-------+--------+--------|
          | 512KB |  NONE  |  NONE  |  (2)   | NONE  |  NONE  |  NONE  |
          |       |        |        | 256K x |       |        |        |
          |       |        |        |   9    |       |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          | 640KB |  (4)   |  (4)   |  NONE  | NONE  |  (2)   |  (2)   |
          |       | 44256  |  4464  |        |       | 41256  |  4164  |
          |-------+--------+--------+--------+-------+--------+--------|
          | 640KB |  NONE  |  (4)   |  (2)   | NONE  |  NONE  |  (2)   |
          |       |        |  4464  | 256K x |       |        |  4164  |
          |       |        |        |   9    |       |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          |  1MB  |  (4)   |  (4)   |  NONE  | NONE  |  (2)   |  (2)   |
          |       | 44256  | 44256  |        |       | 41256  | 41256  |
          |-------+--------+--------+--------+-------+--------+--------|
          |  1MB  |  (4)   |  NONE  |  NONE  |  (2)  |  (2)   |  NONE  |
          |       | 44256  |        |        | 256K  | 41256  |        |
          |       |        |        |        |  x 9  |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          |  1MB  |  NONE  |  NONE  |  (2)   |  (2)  |  NONE  |  NONE  |
          |       |        |        | 256K x | 256K  |        |        |
          |       |        |        |   9    |  x 9  |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          |  2MB  |  NONE  |  NONE  |  (2)   | NONE  |  NONE  |  NONE  |
          |       |        |        | 1MBx 9 |       |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          |  4MB  |  NONE  |  NONE  |  (2)   |  (2)  |  NONE  |  NONE  |
          |       |        |        | 1MBx 9 | 1MBx  |        |        |
          |       |        |        |        |   9   |        |        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DRAM SWITCH CONFIGURATION                  |
          |------------------------------------------------------------|
          |   Size    |     SW1/1      |     SW1/2     |     SW1/3     |
          |-----------+----------------+---------------+---------------|
          |   512KB   |       On       |      On       |      On       |
          |-----------+----------------+---------------+---------------|
          |   640KB   |       On       |      Off      |      Off      |
          |-----------+----------------+---------------+---------------|
          |    1MB    |       On       |      Off      |      On       |
          |-----------+----------------+---------------+---------------|
          |    2MB    |      Off       |      On       |      On       |
          |-----------+----------------+---------------+---------------|
          |    4MB    |      Off       |      Off      |      On       |
          +------------------------------------------------------------+