(TXT) View Source
       
       # ABC COMPUTER COMPANY, LTD.
       
          A4870 VER. 2.0
       
          Processor             80486DX                                  
          Processor Speed       33MHz                                    
          Chip Set              UMC                                      
          Max. Onboard DRAM     32MB                                     
          Cache                 64/128/256KB                             
          BIOS                  AMI                                      
          Dimensions            330.2mm x 218.4mm                        
          I/O Options           32-bit external memory card slot         
          NPU Options           4167                                     
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | External battery |    J1    | Speaker           |   J10    |
          |------------------+----------+-------------------+----------|
          | Turbo switch     |    J7    | Power LED &       |   J11    |
          |                  |          | keylock           |          |
          |------------------+----------+-------------------+----------|
          | Turbo LED        |    J8    | 32-bit external   |    S1    |
          |                  |          | memory card       |          |
          |------------------+----------+-------------------+----------|
          | Reset switch     |    J9    |                   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function              | Jumper |   Position   |
          |------------------------------------+--------+--------------|
          | » | CMOS memory normal operation   |   J4   |  pins 1 & 2  |
          |   |                                |        |    closed    |
          |---+--------------------------------+--------+--------------|
          |   | CMOS memory clear              |   J4   |  pins 2 & 3  |
          |   |                                |        |    closed    |
          |---+--------------------------------+--------+--------------|
          | » | Monitor type select color      |   J5   |    Closed    |
          |---+--------------------------------+--------+--------------|
          |   | Monitor type select monochrome |   J5   |     Open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |  Size   |         Bank 0          |         Bank 1         |
          |---------+-------------------------+------------------------|
          |   1MB   |      (4) 256K x 9       |          NONE          |
          |---------+-------------------------+------------------------|
          |   2MB   |      (4) 256K x 9       |      (4) 256K x 9      |
          |---------+-------------------------+------------------------|
          |   4MB   |       (4) 1M x 9        |          NONE          |
          |---------+-------------------------+------------------------|
          |   5MB   |      (4) 256K x 9       |       (4) 1M x 9       |
          |---------+-------------------------+------------------------|
          |   8MB   |       (4) 1M x 9        |       (4) 1M x 9       |
          |---------+-------------------------+------------------------|
          |  16MB   |       (4) 4M x 9        |          NONE          |
          |---------+-------------------------+------------------------|
          |  17MB   |      (4) 256K x 9       |       (4) 4M x 9       |
          |---------+-------------------------+------------------------|
          |  20MB   |       (4) 1M x 9        |       (4) 4M x 9       |
          |---------+-------------------------+------------------------|
          |  32MB   |       (4) 4M x 9        |       (4) 4M x 9       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |  Size   |     Bank 0     |     Bank 1     |      TAG       |
          |---------+----------------+----------------+----------------|
          |  64KB   |   (4) 8K x 8   |   (4) 8K x 8   |   (4) 4K x 4   |
          |---------+----------------+----------------+----------------|
          |  128KB  |  (4) 32K x 8   |      NONE      |  (4) 16K x 4   |
          |---------+----------------+----------------+----------------|
          |  256KB  |  (4) 32K x 8   |  (4) 32K x 8   |  (4) 16K x 4   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size  |   W3   |   W4   |  W5   |   W6   |   W7   |   W8   |
          |-------+--------+--------+-------+--------+--------+--------|
          | 64KB  | 1 & 2  |  Open  | Open  | 2 & 3  | 1 & 2  | 1 & 2  |
          |-------+--------+--------+-------+--------+--------+--------|
          | 128KB | 2 & 3  | 1 & 2  | Open  | 2 & 3  | 1 & 2  | 1 & 2  |
          |-------+--------+--------+-------+--------+--------+--------|
          | 256KB | 1 & 2  | 2 & 3  | Open  | 2 & 3  | 2 & 3  | 2 & 3  |
          |------------------------------------------------------------|
          | Note:Pins designated should be in closed position.         |
          +------------------------------------------------------------+