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       # NORTHGATE COMPUTER SYSTEMS, INC.
       
          NORTHGATE SUPERB CLT486VL2
       
          Processor    80486SX/80487SX/80486DX/80486DX2/Pentium          
                       Overdrive                                         
          Processor    25/33/40/50(internal)/50/66(internal)MHz          
          Speed        
          Chip Set     Unidentified                                      
          Max. Onboard 32MB                                              
          DRAM         
          Cache        64/128/256KB                                      
          BIOS         AMI                                               
          Dimensions   254mm x 220mm                                     
          I/O Options  32-bit VESA local bus slots (2)                   
          NPU Options  None                                              
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose       | Location | Purpose              | Location |
          |---------------+----------+----------------------+----------|
          | Turbo LED     |   JP10   | External battery     |   JP17   |
          |---------------+----------+----------------------+----------|
          | Speaker       |   JP11   | Turbo switch         |   JP95   |
          |---------------+----------+----------------------+----------|
          | Power LED &   |   JP13   | 32-bit VESA local    |  SL1 &   |
          | keylock       |          | bus slots            |   SL2    |
          |---------------+----------+----------------------+----------|
          | Reset switch  |   JP15   |                      |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Function               | Jumper  |  Position  |
          |-------------------------------------+---------+------------|
          | »  | PQFP CPU disabled              |   JP1   |   Closed   |
          |----+--------------------------------+---------+------------|
          |    | PQFP CPU enabled               |   JP1   |    Open    |
          |----+--------------------------------+---------+------------|
          | »  | Monitor type select monochrome |  JP12   |    Open    |
          |----+--------------------------------+---------+------------|
          |    | Monitor type select color      |  JP12   |   Closed   |
          |----+--------------------------------+---------+------------|
          | »  | CMOS memory normal operation   |  JP16   | pins 1 & 2 |
          |    |                                |         |   closed   |
          |----+--------------------------------+---------+------------|
          |    | CMOS memory clear              |  JP16   | pins 2 & 3 |
          |    |                                |         |   closed   |
          |------------------------------------------------------------|
          | Note: The location of JP1 is unidentified. If board does   |
          | not have PQFP CPU, JP1 will not be present.                |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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     |
          |------------------+--------------------+--------------------|
          |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       17MB       |    (4) 256K x 9    |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 4M x 9     |     (4) 1M 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       |        JP7         |        JP8         |
          |------------------+--------------------+--------------------|
          |       64KB       | pins 2 & 3 closed  | pins 2 & 4 closed  |
          |------------------+--------------------+--------------------|
          |      128KB       | pins 1 & 2 closed  | pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |      256KB       | pins 1 & 2 closed  | pins 1 & 2 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CPU SPEED/TYPE CONFIGURATION                |
          |------------------------------------------------------------|
          |     Type      |   JP2    |  JP3  |  JP4   | JP33  |  JP72  |
          |---------------+----------+-------+--------+-------+--------|
          |  80486SX-25   |   Open   | Open  |  Open  | 2 & 3 | Closed |
          |    (PQFP)     |          |       |        |       |        |
          |---------------+----------+-------+--------+-------+--------|
          |  80486SX-25   |  2 & 3   | Open  |  Open  | 2 & 3 | Closed |
          |     (PGA)     |          |       |        |       |        |
          |---------------+----------+-------+--------+-------+--------|
          |  80486SX-33   |   Open   | Open  |  Open  | 2 & 3 |  Open  |
          |    (PQFP)     |          |       |        |       |        |
          |---------------+----------+-------+--------+-------+--------|
          |  80487SX-25   | 1 & 2, 3 | 1 & 2 | Closed | 2 & 3 | Closed |
          |               |   & 4    |       |        |       |        |
          |---------------+----------+-------+--------+-------+--------|
          |  80486DX-33   | 1 & 2, 3 | 2 & 3 |  Open  | 2 & 3 |  Open  |
          |               |   & 4    |       |        |       |        |
          |---------------+----------+-------+--------+-------+--------|
          |  80486DX-50   | 1 & 2, 3 | 2 & 3 |  Open  | 1 & 2 |  Open  |
          |               |   & 4    |       |        |       |        |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            CPU SPEED/TYPE CONFIGURATION (CON’T)            |
          |------------------------------------------------------------|
          |     Type      |   JP2    |  JP3  |  JP4   | JP33  |  JP72  |
          |---------------+----------+-------+--------+-------+--------|
          |  80486DX2-50  | 1 & 2, 3 | 2 & 3 |  Open  | 2 & 3 | Closed |
          |               |   & 4    |       |        |       |        |
          |---------------+----------+-------+--------+-------+--------|
          |  80486DX2-66  | 1 & 2, 3 | 2 & 3 |  Open  | 2 & 3 |  Open  |
          |               |   & 4    |       |        |       |        |
          |---------------+----------+-------+--------+-------+--------|
          |    Pentium    | 1 & 2, 3 | 1 & 2 | Closed | 2 & 3 | Closed |
          |   Overdrive   |   & 4    |       |        |       |        |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               VESA WAIT STATE CONFIGURATION                |
          |------------------------------------------------------------|
          |          Wait states          |            ID2             |
          |-------------------------------+----------------------------|
          |         0 wait states         |            Open            |
          |-------------------------------+----------------------------|
          |         1 wait state          |           Closed           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BUS SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |           CPU speed           |            ID3             |
          |-------------------------------+----------------------------|
          |           <= 33MHz            |            Open            |
          |-------------------------------+----------------------------|
          |            > 33MHz            |           Closed           |
          +------------------------------------------------------------+