(TXT) View Source
       
       # UNIDENTIFIED
       
          NE486VL2
       
          Processor    80486SX/80487SX/80486DX/80486DX2/Pentium          
                       Overdrive                                         
          Processor    20/25/33/50(internal)/50/66(internal)MHz          
          Speed        
          Chip Set     Unidentified                                      
          Max. Onboard 32MB                                              
          DRAM         
          Cache        64/128/256KB                                      
          BIOS         AMI                                               
          Dimensions   330mm x 218mm                                     
          I/O Options  32-bit VESA local bus 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      |  SL1 &   |
          | keylock           |          | local bus slots  |   SL2    |
          |-------------------+----------+------------------+----------|
          | Speaker           |   JP10   |                  |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Battey type select internal      |  JP2   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery type select external     |  JP2   |   Closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP5   |    Open    |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | CMOS memory normal operation     |  JP6   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |  JP6   | 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     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    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  |    JP8A     |    JP8B    |    JP8D    |    JP8E    |
          |-------+-------------+------------+------------+------------|
          | 64KB  | pins 2 & 3  | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
          |       |   closed    |   closed   |   closed   |   closed   |
          |-------+-------------+------------+------------+------------|
          | 128KB | pins 1 & 2  | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
          |       |   closed    |   closed   |   closed   |   closed   |
          |-------+-------------+------------+------------+------------|
          | 256KB | pins 2 & 3  | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
          |       |   closed    |   closed   |   closed   |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |       Type       |   JP12   |   JP13   |  JP29   |  JP30   |
          |------------------+----------+----------+---------+---------|
          | 80486SX/DX(PQFP) | pins 2 & | pins 2 & | pins 2  | pins 2  |
          |                  | 3 closed | 3 closed |   & 3   |   & 3   |
          |                  |          |          | closed  | closed  |
          |------------------+----------+----------+---------+---------|
          |     80486SX      | pins 2 & | pins 2 & | pins 2  | pins 2  |
          |                  | 3 closed | 3 closed |   & 3   |   & 3   |
          |                  |          |          | closed  | closed  |
          |------------------+----------+----------+---------+---------|
          |     80487SX      | pins 1 & | pins 1 & | pins 2  | pins 2  |
          |                  | 2 closed | 2 closed |   & 3   |   & 3   |
          |                  |          |          | closed  | closed  |
          |------------------+----------+----------+---------+---------|
          |     80486DX      | pins 1 & | pins 1 & | pins 1  | pins 1  |
          |                  | 2 closed | 2 closed |   & 2   |   & 2   |
          |                  |          |          | closed  | closed  |
          |------------------+----------+----------+---------+---------|
          |     80486DX2     | pins 1 & | pins 1 & | pins 1  | pins 1  |
          |                  | 2 closed | 2 closed |   & 2   |   & 2   |
          |                  |          |          | closed  | closed  |
          |------------------+----------+----------+---------+---------|
          |       P23T       | pins 1 & | pins 1 & | pins 2  | pins 2  |
          |                  | 2 closed | 2 closed |   & 3   |   & 3   |
          |                  |          |          | closed  | closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          | Speed  |      JP7A       |      JP7B      |      JP7C      |
          |--------+-----------------+----------------+----------------|
          | 20MHz  |   pins 2 & 3    |   pins 1 & 2   |   pins 1 & 2   |
          |        |     closed      |     closed     |     closed     |
          |--------+-----------------+----------------+----------------|
          | 25MHz  |   pins 1 & 2    |   pins 2 & 3   |   pins 1 & 2   |
          |        |     closed      |     closed     |     closed     |
          |--------+-----------------+----------------+----------------|
          | 33MHz  |   pins 1 & 2    |   pins 1 & 2   |   pins 2 & 3   |
          |        |     closed      |     closed     |     closed     |
          |--------+-----------------+----------------+----------------|
          | 50iMHz |   pins 1 & 2    |   pins 2 & 3   |   pins 1 & 2   |
          |        |     closed      |     closed     |     closed     |
          |--------+-----------------+----------------+----------------|
          | 50MHz  |   pins 2 & 3    |   pins 1 & 2   |   pins 2 & 3   |
          |        |     closed      |     closed     |     closed     |
          |--------+-----------------+----------------+----------------|
          | 66iMHz |   pins 1 & 2    |   pins 1 & 2   |   pins 2 & 3   |
          |        |     closed      |     closed     |     closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               VESA WAIT STATE CONFIGURATION                |
          |------------------------------------------------------------|
          |        Wait states         |             JP102             |
          |----------------------------+-------------------------------|
          |       0 wait states        |       pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |        1 wait state        |       pins 2 & 3 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BUS SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |         CPU speed          |             JP103             |
          |----------------------------+-------------------------------|
          |          <= 33MHz          |       pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          > 33MHz           |       pins 2 & 3 closed       |
          +------------------------------------------------------------+