(TXT) View Source
       
       # EFA CORPORATION
       
          4M50HL3
       
          Processor    CX486SX/80486SX/CX486DX/80486DX/80486DX2/ODP486SX 
          Processor    20/25/33/40/50(internal)/50/66(internal)MHz       
          Speed        
          Chip Set     UMC                                               
          Max. Onboard 32MB                                              
          DRAM         
          Cache        64/128/256KB                                      
          BIOS         AMI                                               
          Dimensions   330mm x 218mm                                     
          I/O Options  32-bit VESA local bus slots (3)                   
          NPU Options  None                                              
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | External battery |    J1    | Turbo switch      |   J29    |
          |------------------+----------+-------------------+----------|
          | Turbo LED        |   J25    | 32-bit VESA Local |    S1    |
          |                  |          | bus slot          |          |
          |------------------+----------+-------------------+----------|
          | Speaker          |   J26    | 32-bit VESA Local |    S2    |
          |                  |          | bus slot          |          |
          |------------------+----------+-------------------+----------|
          | Power LED &      |   J27    | 32-bit VESA Local |    S3    |
          | keylock          |          | bus slot          |          |
          |------------------+----------+-------------------+----------|
          | Reset switch     |   J28    |                   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | CMOS memory normal operation     |   J2   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |   J2   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | On board battery enabled         |   J3   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | On board battery disabled        |   J3   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Western Digital HDD (WDAC2340)   |   J5   | pins 1 & 2 |
          |   | not installed                    |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Western Digital HDD (WDAC2340)   |   J5   | pins 2 & 3 |
          |   | installed                        |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 3       |
          |------------------+--------------------+--------------------|
          |       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     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |   Size   |     Bank 0     |     Bank 1     |      TAG      |
          |----------+----------------+----------------+---------------|
          |   64KB   |   (4) 8K x 8   |   (4) 8K x 8   |  (1) 8K x 8   |
          |----------+----------------+----------------+---------------|
          |  128KB   |  (4) 32K x 8   |      NONE      |  (1) 8K x 8   |
          |----------+----------------+----------------+---------------|
          |  256KB   |  (4) 32K x 8   |  (4) 32K x 8   |  (1) 32K x 8  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size |  J7  |  J8  |  J9  | J10  | J11  | J12  | J15 | J16 |
          |------+------+------+------+------+------+------+-----+-----|
          | 64KB | Open |2 & 3 | Open | Open | Open | Open |1 & 2|1 & 2|
          |------+------+------+------+------+------+------+-----+-----|
          |128KB |2 & 3 |1 & 2 |Closed| Open |Closed| Open |1 & 2|2 & 3|
          |------+------+------+------+------+------+------+-----+-----|
          |256KB |1 & 2 |2 & 3 |Closed|Closed|Closed|Closed|2 & 3|2 & 3|
          |------------------------------------------------------------|
          |Note:Pins designated should be in the closed position.      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |Speed | J20  |SW1/switch |SW1/switch |SW1/switch |SW1/switch|
          |      |      |     1     |     2     |     3     |    4     |
          |------+------+-----------+-----------+-----------+----------|
          |20MHz |Closed|    Off    |    Off    |    On     |   Off    |
          |------+------+-----------+-----------+-----------+----------|
          |25MHz | Open |    On     |    On     |    Off    |    On    |
          |------+------+-----------+-----------+-----------+----------|
          |33MHz | Open |    On     |    Off    |    On     |    On    |
          |------+------+-----------+-----------+-----------+----------|
          |40MHz | Open |    Off    |    Off    |    On     |   Off    |
          |------+------+-----------+-----------+-----------+----------|
          | 50i  | Open |    On     |    On     |    Off    |    On    |
          | MHz  |      |           |           |           |          |
          |------+------+-----------+-----------+-----------+----------|
          |50MHz | Open |    Off    |    Off    |    Off    |   Off    |
          |------+------+-----------+-----------+-----------+----------|
          | 66i  | Open |    On     |    Off    |    On     |    On    |
          | MHz  |      |           |           |           |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |  Type  |J13 | J14  | J17 | J18  | J19  |J20 | J21  |J24|J30|
          |--------+----+------+-----+------+------+----+------+---+---|
          |80486SX |1 & | Open |Open | Open | Open |N/A |Closed|1 &|2 &|
          |        | 2  |      |     |      |      |    |      | 2 | 3 |
          |--------+----+------+-----+------+------+----+------+---+---|
          |CX486SX |2 & |Closed|1 & 2| Open | Open |Open|Closed|1 &|2 &|
          |        | 3  |      |     |      |      |    |      | 2 | 3 |
          |--------+----+------+-----+------+------+----+------+---+---|
          |80486DX |1 & | Open |1 & 2|Closed|Closed|N/A | Open |1 &|2 &|
          |        | 2  |      |     |      |      |    |      | 2 | 3 |
          |--------+----+------+-----+------+------+----+------+---+---|
          |CX486SX |2 & |Closed|1 & 2|Closed|Closed|Open| Open |1 &|2 &|
          |        | 3  |      |     |      |      |    |      | 2 | 3 |
          |--------+----+------+-----+------+------+----+------+---+---|
          |ODP486SX|1 & | Open |1 & 2|Closed|Closed|N/A | Open |1 &|2 &|
          |        | 2  |      |     |      |      |    |      | 2 | 3 |
          |--------+----+------+-----+------+------+----+------+---+---|
          |80486DX2|1 & | Open |1 & 2|Closed|Closed|N/A | Open |1 &|2 &|
          |        | 2  |      |     |      |      |    |      | 2 | 3 |
          |------------------------------------------------------------|
          |Note: Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |          VESA WAIT STATE/BUS SPEED CONFIGURATION           |
          |------------------------------------------------------------|
          | CPU speed |  Wait  |       J6        |   J22    |   J23    |
          |           | states |                 |          |          |
          |-----------+--------+-----------------+----------+----------|
          |  £ 33MHz  | 0 wait |   pins 1 & 2    | pins 1 & | pins 1 & |
          |           | states |     closed      | 2 closed | 2 closed |
          |-----------+--------+-----------------+----------+----------|
          |  > 33MHz  | 1 wait |   pins 2 & 3    | pins 2 & | pins 2 & |
          |           | state  |     closed      | 3 closed | 3 closed |
          +------------------------------------------------------------+