PIONEER COMPUTER, INC.
======================

   VANTAGE 486WB 25/33/50

   Processor             80486DX                                  
   Processor Speed       25/33/50MHz                              
   Chip Set              OPTI                                     
   Max. Onboard DRAM     32MB                                     
   Cache                 64/256KB                                 
   BIOS                  AMI                                      
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/P-R/30447-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Turbo LED      |    J1    | Power LED & keylock |    J4    |
   |----------------+----------+---------------------+----------|
   | Reset switch   |    J2    | External battery    |    J5    |
   |----------------+----------+---------------------+----------|
   | Speaker        |    J3    |                     |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP18  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP18  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP19  |    Open    |
   |   | alter                            |        |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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       |        TAG         |
   |------------------+--------------------+--------------------|
   |       64KB       |     (8) 8K x 8     |    (3) 16K x 4     |
   |------------------+--------------------+--------------------|
   |      256KB       |    (8) 32K x 8     |    (3) 16K x 4     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size   |   JP1    |       JP11        |       JP15        |
   |---------+----------+-------------------+-------------------|
   |  64KB   |   Open   | pins 1 & 2 closed | pins 1 & 2 closed |
   |---------+----------+-------------------+-------------------|
   |  256KB  |  Closed  | pins 2 & 3 closed | pins 2 & 3 closed |
   +------------------------------------------------------------+