(TXT) View Source
       
       # UNIDENTIFIED
       
          450L2 CACHE
       
          Processor         80486SX/80487SX/80486DX/ODP486SX/80486DX2    
          Processor Speed   20/25/33/50 (Internal)/50/66 (Internal)MHz   
          Chip Set          OPTI                                         
          Max. onboard DRAM 32MB                                         
          Cache             64/128/256KB                                 
          BIOS              AMI                                          
          Dimensions        330mm x 218mm                                
          I/O Options       32-bit local bus slots (2)                   
          NPU Options       None                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | External battery  |    J1    | Turbo LED        |   JP10   |
          |-------------------+----------+------------------+----------|
          | Speaker           |   J17    | 32-bit local bus |    S1    |
          |                   |          | slot             |          |
          |-------------------+----------+------------------+----------|
          | Power LED &       |   J18    |                  |    S2    |
          | keylock           |          |                  |          |
          |-------------------+----------+------------------+----------|
          | Turbo switch      |   JP9    | Reset            |   SW1    |
          |------------------------------------------------------------|
          | Note:The exact locations of local bus slots S1 and S2 are  |
          | unknown.                                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function              |  Jumper   |  Position  |
          |-----------------------------------+-----------+------------|
          | » | CMOS memory normal operation  |    JP1    | pins 2 & 3 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | CMOS memory clear             |    JP1    | pins 1 & 2 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          | » | Monitor type select color     |    JP2    |   Closed   |
          |---+-------------------------------+-----------+------------|
          |   | Monitor type select           |    JP2    |    Open    |
          |   | monochrome                    |           |            |
          |---+-------------------------------+-----------+------------|
          | » | Ready signal select ISA       | JP3 & JP4 | pins 1 & 2 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          |   | Ready signal select Local bus | JP3 & JP4 | pins 2 & 3 |
          |   |                               |           |   closed   |
          |---+-------------------------------+-----------+------------|
          | » | CPU upgrade (486PQFP to       |   JP17    |   Closed   |
          |   | 486PGA) enabled               |           |            |
          |---+-------------------------------+-----------+------------|
          |   | CPU upgrade (486PQFP to       |   JP17    |    Open    |
          |   | 486PGA) disabled              |           |            |
          |------------------------------------------------------------|
          | Note:The location of jumpers JP3 and JP4 is unknown.       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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) 1M x 9     |    (4) 256K 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 (U39)  | TAG (U40)  |
          |-------+-------------+------------+------------+------------|
          | 64KB  | (4) 8K x 8  | (4) 8K x 8 | (1) 8K x 8 |    NONE    |
          |-------+-------------+------------+------------+------------|
          | 128KB | (4) 32K x 8 |    NONE    | (1) 8K x 8 |    NONE    |
          |-------+-------------+------------+------------+------------|
          | 256KB | (4) 32K x 8 | (4) 32K x  | (1) 8K x 8 | (1) 8K x 8 |
          |       |             |     8      |            |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size  |  JP5   |  JP6   |  JP7   |  JP8  |  JP15  |  JP16  |
          |-------+--------+--------+--------+-------+--------+--------|
          | 64KB  |  Open  |  Open  |  Open  | pins  |  Open  |  Open  |
          |       |        |        |        | 2 & 3 |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          | 128KB | Closed |  Open  | Closed | pins  |  Open  | Closed |
          |       |        |        |        | 1 & 2 |        |        |
          |-------+--------+--------+--------+-------+--------+--------|
          | 256KB | Closed | Closed | Closed | pins  | Closed | Closed |
          |       |        |        |        | 2 & 3 |        |        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |   Speed    |   JP11    |   JP12    |   JP13    |   JP14    |
          |------------+-----------+-----------+-----------+-----------|
          |   20MHz    |  Closed   |  Closed   |   Open    |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |   25MHz    |   Open    |  Closed   |   Open    |  Closed   |
          |------------+-----------+-----------+-----------+-----------|
          |   33MHz    |   Open    |   Open    |  Closed   |  Closed   |
          |------------+-----------+-----------+-----------+-----------|
          |  50i MHz   |   Open    |  Closed   |   Open    |  Closed   |
          |------------+-----------+-----------+-----------+-----------|
          |   50MHz    |   Open    |   Open    |  Closed   |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |   66MHz    |   Open    |   Open    |  Closed   |  Closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |     Type     |       JP18       |  JP19  |      JP20       |
          |--------------+------------------+--------+-----------------|
          | 80486SX PQFP |       Open       | Closed |   pins 2 & 3    |
          |              |                  |        |     closed      |
          |--------------+------------------+--------+-----------------|
          | 80486SX PGA  |       Open       |  Open  |   pins 2 & 3    |
          |              |                  |        |     closed      |
          |--------------+------------------+--------+-----------------|
          |   80487SX    |    pins 2 & 3    | Closed |   pins 1 & 2    |
          |              |      closed      |        |     closed      |
          |--------------+------------------+--------+-----------------|
          |   80486DX    |    pins 1 & 2    | Closed |   pins 1 & 2    |
          |              |      closed      |        |     closed      |
          |--------------+------------------+--------+-----------------|
          |   ODP486SX   |       Open       |  Open  |   pins 2 & 3    |
          |              |                  |        |     closed      |
          |--------------+------------------+--------+-----------------|
          |   80486DX2   |    pins 1 & 2    | Closed |   pins 1 & 2    |
          |              |      closed      |        |     closed      |
          +------------------------------------------------------------+