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       # NORTHGATE COMPUTER SYSTEMS, INC.
       
          ELEGANCE 486 25/33
       
          Processor        80486DX                                       
          Processor Speed  25/33MHz                                      
          Chip Set         OPTI                                          
          Max. Onboard     8MB                                           
          DRAM             
          Cache            128KB                                         
          BIOS             AMI                                           
          Dimensions       350mm x 304mm                                 
          I/O Options      Parallel port, serial ports (2), 32-bit       
                           external memory card slot                     
          NPU Options      4167                                          
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose        | Location | Purpose             | Location |
          |----------------+----------+---------------------+----------|
          | Turbo LED      |    J3    | Serial port 1       |    J9    |
          |----------------+----------+---------------------+----------|
          | Power LED &    |    J4    | Serial port 2       |   J10    |
          | keylock        |          |                     |          |
          |----------------+----------+---------------------+----------|
          | Speaker        |    J5    | 32-bit external     |    S1    |
          |                |          | memory card         |          |
          |----------------+----------+---------------------+----------|
          | Reset switch   |    J6    | Turbo switch        |    W6    |
          |----------------+----------+---------------------+----------|
          | Parallel port  |    J8    |                     |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |           Function            | Jumper/Switch |  Position  |
          |-------------------------------+---------------+------------|
          | » | Parallel port enabled     |     SW2/3     |    Off     |
          |---+---------------------------+---------------+------------|
          |   | Parallel port disabled    |     SW2/3     |     On     |
          |---+---------------------------+---------------+------------|
          | » | Parallel port select LPT1 |     SW2/4     |    Off     |
          |---+---------------------------+---------------+------------|
          |   | Parallel port select LPT2 |     SW2/4     |     On     |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |      W1       |    Open    |
          |   | not alter                 |               |            |
          |---+---------------------------+---------------+------------|
          | » | Factory configured - do   |      W4       | pins 2 & 3 |
          |   | not alter                 |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Altered cache miss wait   |      W5       | pins 2 & 3 |
          |   | state select 25MHz CPU    |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Altered cache miss wait   |      W5       | pins 1 & 2 |
          |   | state select 33MHz CPU    |               |   closed   |
          |---+---------------------------+---------------+------------|
          | » | Monitor type select color |      W7       | pins 2 & 3 |
          |   |                           |               |   closed   |
          |---+---------------------------+---------------+------------|
          |   | Monitor type select       |      W7       | pins 1 & 2 |
          |   | monochrome                |               |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |  Size  |     Bank 0     |   Bank 1   |  Bank 2  |  Bank 3  |
          |--------+----------------+------------+----------+----------|
          |  1MB   |  (4) 256K x 9  |    NONE    |   NONE   |   NONE   |
          |--------+----------------+------------+----------+----------|
          |  2MB   |  (4) 256K x 9  | (4) 256K x |   NONE   |   NONE   |
          |        |                |     9      |          |          |
          |--------+----------------+------------+----------+----------|
          |  3MB   |  (4) 256K x 9  | (4) 256K x | (4) 256K |   NONE   |
          |        |                |     9      |   x 9    |          |
          |--------+----------------+------------+----------+----------|
          |  4MB   |  (4) 256K x 9  | (4) 256K x | (4) 256K | (4) 256K |
          |        |                |     9      |   x 9    |   x 9    |
          |--------+----------------+------------+----------+----------|
          |  4MB   |   (4) 1M x 9   |    NONE    |   NONE   |   NONE   |
          |--------+----------------+------------+----------+----------|
          |  5MB   |   (4) 1M x 9   |    NONE    | (4) 256K |   NONE   |
          |        |                |            |   x 9    |          |
          |--------+----------------+------------+----------+----------|
          |  6MB   |   (4) 1M x 9   |    NONE    | (4) 256K | (4) 256K |
          |        |                |            |   x 9    |   x 9    |
          |--------+----------------+------------+----------+----------|
          |  8MB   |   (4) 1M x 9   | (4) 1M x 9 |   NONE   |   NONE   |
          |--------+----------------+------------+----------+----------|
          |  9MB   |   (4) 1M x 9   | (4) 1M x 9 | (4) 256K |   NONE   |
          |        |                |            |   x 9    |          |
          |--------+----------------+------------+----------+----------|
          |  10MB  |   (4) 1M x 9   | (4) 1M x 9 | (4) 256K | (4) 256K |
          |        |                |            |   x 9    |   x 9    |
          |--------+----------------+------------+----------+----------|
          |  12MB  |   (4) 1M x 9   | (4) 1M x 9 | (4) 1M x |   NONE   |
          |        |                |            |    9     |          |
          |--------+----------------+------------+----------+----------|
          |  16MB  |   (4) 1M x 9   | (4) 1M x 9 | (4) 1M x | (4) 1M x |
          |        |                |            |    9     |    9     |
          |------------------------------------------------------------|
          | Note:Banks 2 & 3 are used when a 32-bit external memory    |
          | card is installed at S1.                                   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              DRAM JUMPER/SWITCH CONFIGURATION              |
          |------------------------------------------------------------|
          | Size  | SW1/1  | SW1/2  | SW1/3  | SW1/4  |   W8   |  W9   |
          |-------+--------+--------+--------+--------+--------+-------|
          |  1MB  | Closed |  Open  | Closed | Closed | 2 & 3  | 2 & 3 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  2MB  |  Open  |  Open  | Closed |  Open  | 2 & 3  | 2 & 3 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  3MB  |  Open  |  Open  |  Open  | Closed | 2 & 3  | 2 & 3 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  4MB  |  Open  |  Open  |  Open  | Closed | 2 & 3  | 2 & 3 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  4MB  | Closed | Closed | Closed | Closed | 1 & 2  | 1 & 2 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  5MB  | Closed | Closed | Closed |  Open  | 1 & 2  | 1 & 2 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  6MB  | Closed | Closed | Closed |  Open  | 1 & 2  | 1 & 2 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  8MB  |  Open  | Closed | Closed |  Open  | 1 & 2  | 1 & 2 |
          |-------+--------+--------+--------+--------+--------+-------|
          |  9MB  |  Open  | Closed |  Open  | Closed | 1 & 2  | 1 & 2 |
          |-------+--------+--------+--------+--------+--------+-------|
          | 10MB  |  Open  | Closed |  Open  | Closed | 1 & 2  | 1 & 2 |
          |-------+--------+--------+--------+--------+--------+-------|
          | 12MB  |  Open  | Closed |  Open  | Closed | 1 & 2  | 1 & 2 |
          |-------+--------+--------+--------+--------+--------+-------|
          | 16MB  |  Open  | Closed |  Open  |  Open  | 1 & 2  | 1 & 2 |
          |------------------------------------------------------------|
          | Note:Pins designated should be in the closed position.     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |        TAG         |
          |------------------+--------------------+--------------------|
          |       64KB       |    (8) 64K x 1     |    (2) 64K x 1     |
          |------------------+--------------------+--------------------|
          |      128KB       |    (8) 64K x 4     |    (2) 64K x 4     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |       Size       |         W2         |         W3         |
          |------------------+--------------------+--------------------|
          |       64KB       |  pin 1 & 2 closed  |  pin 1 & 2 closed  |
          |------------------+--------------------+--------------------|
          |      128KB       |  pin 2 & 3 closed  |  pin 2 & 3 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              PARALLEL PORT IRQ CONFIGURATION               |
          |------------------------------------------------------------|
          |        IRQ        |       SW3/3        |       SW3/4       |
          |-------------------+--------------------+-------------------|
          |       IRQ7        |        Off         |        On         |
          |-------------------+--------------------+-------------------|
          |       IRQ5        |         On         |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                SERIAL PORT 1 CONFIGURATION                 |
          |------------------------------------------------------------|
          |      Setting       |       SW2/1       |       SW3/1       |
          |--------------------+-------------------+-------------------|
          |      Enabled       |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |      Disabled      |        On         |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                SERIAL PORT 2 CONFIGURATION                 |
          |------------------------------------------------------------|
          |      Setting       |       SW2/2       |       SW3/2       |
          |--------------------+-------------------+-------------------|
          |      Enabled       |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |      Disabled      |        On         |        Off        |
          +------------------------------------------------------------+