(TXT) View Source
       
       # UNIDENTIFIED
       
          A486SX/DX
       
          Processor         80486SX/80487SX/80486DX/80486DX2             
          Processor Speed   25/33/50(internal)/50/66(internal)MHz        
          Chip Set          ALI                                          
          Max. Onboard DRAM 32MB                                         
          Cache             64/128/256KB                                 
          BIOS              AMI                                          
          Dimensions        254mm x 220mm                                
          I/O Options       None                                         
          NPU Options       None                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | External battery |   JP10   | Power LED &       |   JP21   |
          |                  |          | keylock           |          |
          |------------------+----------+-------------------+----------|
          | Reset switch     |   JP17   | Turbo switch      |   JP22   |
          |------------------+----------+-------------------+----------|
          | Speaker          |   JP20   | Turbo LED         |   JP23   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Monitor type select color        |  JP4   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select monochrome   |  JP4   |    Open    |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP6   |    N/A     |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Battery type select DS1287       |  JP11  |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery type select 146818       |  JP11  |    Open    |
          |---+----------------------------------+--------+------------|
          | » | Clock input select 2x            |  JP12  | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Clock input select 1x            |  JP12  | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Parity check enabled             |  JP13  | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Parity check disabled            |  JP13  | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP18  |    N/A     |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | PQFP CPU disabled                |  JP29  |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | PQFP CPU enabled                 |  JP29  |    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        |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |   Bank 0    |   Bank 1   |  TAG (U9)  | TAG (U11)  |
          |-------+-------------+------------+------------+------------|
          | 64KB  | (4) 8K x 8  | (4) 8K x 8 |    NONE    | (1) 8K x 8 |
          |-------+-------------+------------+------------+------------|
          | 64KB  | (4) 8K x 8  | (4) 8K x 8 | (1) 8K x 8 |    NONE    |
          |-------+-------------+------------+------------+------------|
          | 128KB | (4) 32K x 8 |    NONE    |    NONE    | (1) 8K x 8 |
          |-------+-------------+------------+------------+------------|
          | 256KB | (4) 32K x 8 | (4) 32K x  | (1) 8K x 8 | (1) 8K x 8 |
          |       |             |     8      |            |            |
          |-------+-------------+------------+------------+------------|
          | 256KB | (4) 32K x 8 | (4) 32K x  |    NONE    | (1) 32K x  |
          |       |             |     8      |            |     8      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size | JP5 | JP7 | JP8 | JP9 |JP24 |JP25 |JP26 |JP27 |JP28 |
          |------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          | 64KB |1 & 2|1 & 2|1 & 2|Open |1 & 2|1 & 2|1 & 2|1 & 2|2 & 3|
          |------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          | 64KB |1 & 2|1 & 2|Open |1 & 2|1 & 2|1 & 2|1 & 2|1 & 2|2 & 3|
          |------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |128KB |2 & 3|1 & 2|1 & 2|Open |2 & 3|2 & 3|2 & 3|2 & 3|1 & 2|
          |------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |256KB |1 & 2|2 & 3|2 & 3|2 & 3|1 & 2|1 & 2|1 & 2|1 & 2|2 & 3|
          |------+-----+-----+-----+-----+-----+-----+-----+-----+-----|
          |256KB |1 & 2|2 & 3|1 & 2|Open |1 & 2|1 & 2|1 & 2|1 & 2|2 & 3|
          |------------------------------------------------------------|
          |Note: Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |   Type   |      JP14      |      JP15      |     JP16      |
          |----------+----------------+----------------+---------------|
          | 80486SX  |   pins 1 & 2   |   pins 1 & 2   |     Open      |
          |          |     closed     |     closed     |               |
          |----------+----------------+----------------+---------------|
          | 80487SX  |   pins 2 & 3   |   pins 2 & 3   |  pins 1 & 2   |
          |          |     closed     |     closed     |    closed     |
          |----------+----------------+----------------+---------------|
          | 80486DX  |   pins 2 & 3   |   pins 2 & 3   |  pins 2 & 3   |
          |          |     closed     |     closed     |    closed     |
          |----------+----------------+----------------+---------------|
          | 80486DX2 |   pins 2 & 3   |   pins 2 & 3   |  pins 2 & 3   |
          |          |     closed     |     closed     |    closed     |
          +------------------------------------------------------------+