(TXT) View Source
       
       # MICRO EXPRESS, INC.
       
          FOREX 486 VESA (Rev. VL 421A/422)
       
          Processor          80486SX/80487SX/80486DX/ODP486SX/80486DX2   
          Processor Speed    20/25/33/50(internal)/50/66(internal)       
          Chip Set           FOREX                                       
          Max. Onboard DRAM  32MB                                        
          SRAM Cache         64/128/256KB                                
          BIOS               AMI                                         
          Dimensions         330mm x 218mm                               
          I/O Options        32-bit VESA card slots (2)                  
          NPU Options        None                                        
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | External battery |   JP2    | Turbo switch      |   JP15   |
          |------------------+----------+-------------------+----------|
          | Reset switch     |   JP3    | Turbo LED         |   JP16   |
          |------------------+----------+-------------------+----------|
          | Power LED &      |   JP9    | 32-bit VESA local | S1 & S2  |
          | keylock          |          | bus slots         |          |
          |------------------+----------+-------------------+----------|
          | Speaker          |   JP10   |                   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Battery select internal          |  JP2   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery select external          |  JP2   | connected  |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP5   |   closed   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | CMOS memory normal operation     |  JP6   |    open    |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |  JP6   |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VESA bus select zero wait states | JP102  | pins 1 & 2 |
          |   | £ 33MHz                          |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VESA bus select one wait state > | JP102  | pins 2 & 3 |
          |   | 33MHz                            |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VESA bus speed select £ 33MHz    | JP103  | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VESA bus speed select > 33MHz    | JP103  | pins 2 & 3 |
          |   |                                  |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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        |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          | CPU speed |      JP7A      |     JP7B      |     JP7C      |
          |-----------+----------------+---------------+---------------|
          |   50MHz   |   pins 2 & 3   |  pins 1 & 2   |  pins 2 & 3   |
          |           |     closed     |    closed     |    closed     |
          |-----------+----------------+---------------+---------------|
          |   33MHz   |   pins 1 & 2   |  pins 1 & 2   |  pins 2 & 3   |
          |           |     closed     |    closed     |    closed     |
          |-----------+----------------+---------------+---------------|
          |   25MHz   |   pins 1 & 2   |  pins 2 & 3   |  pins 1 & 2   |
          |           |     closed     |    closed     |    closed     |
          |-----------+----------------+---------------+---------------|
          |   20MHz   |   pins 2 & 3   |  pins 1 & 2   |  pins 1 & 2   |
          |           |     closed     |    closed     |    closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          | CPU Type |     JP12     |    JP13    |   JP29   |   JP30   |
          |----------+--------------+------------+----------+----------|
          | 80486DX2 |  pins 1 & 2  | pins 1 & 2 | pins 1 & | pins 1 & |
          |          |    closed    |   closed   | 2 closed | 2 closed |
          |----------+--------------+------------+----------+----------|
          | ODP486SX |  pins 1 & 2  | pins 1 & 2 | pins 2 & | pins 2 & |
          |          |    closed    |   closed   | 3 closed | 3 closed |
          |----------+--------------+------------+----------+----------|
          | 80486DX  |  pins 1 & 2  | pins 1 & 2 | pins 1 & | pins 1 & |
          |          |    closed    |   closed   | 2 closed | 2 closed |
          |----------+--------------+------------+----------+----------|
          | 80487SX  |  pins 1 & 2  | pins 1 & 2 | pins 2 & | pins 2 & |
          |          |    closed    |   closed   | 3 closed | 3 closed |
          |----------+--------------+------------+----------+----------|
          | 80486SX  |  pins 2 & 3  | pins 2 & 3 | pins 2 & | pins 2 & |
          |          |    closed    |   closed   | 3 closed | 3 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |   Cache   | Location |   TAG   | JP8A & D | JP8B & |
          |       |   SRAM    |          |         |          |   E    |
          |-------+-----------+----------+---------+----------+--------|
          | 64KB  | (8) 8K x  | Banks 0  | (1) 8K  | pins 2 & | pins 2 |
          |       |     8     |   & 1    |   x 8   |    3     |  & 3   |
          |-------+-----------+----------+---------+----------+--------|
          | 128KB | (4) 32K x |  Bank 0  | (1) 8K  | pins 1 & | pins 1 |
          |       |     8     |          |   x 8   |    2     |  & 2   |
          |-------+-----------+----------+---------+----------+--------|
          | 256KB | (8) 32K x | Banks 0  | (1) 32K | pins 2 & | pins 1 |
          |       |     8     |   & 1    |   x 8   |    3     |  & 2   |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+