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

   VANTAGE 486NC SX-20/25/33

   Processor   80486SX/ODP486SX                                   
   Processor   20/25/33/40(internal)/50(internal)/66(internal)MHz 
   Speed       
   Chip Set    OPTI                                               
   Max.        32MB                                               
   Onboard     
   DRAM        
   Cache       None                                               
   BIOS        Phoenix                                            
   Dimensions  240mm x 220mm                                      
   I/O Options None                                               
   NPU Options 80487SX                                            

<gopher://bitreich.org/I/th99/m/P-R/30840-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Turbo LED      |    J2    | Speaker             |    J5    |
   |----------------+----------+---------------------+----------|
   | Turbo switch   |    J3    | Power LED & keylock |    J6    |
   |----------------+----------+---------------------+----------|
   | Reset switch   |    J4    | External battery    |    J7    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP3   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP3   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | 80487SX or ODP486SX upgrade not  |  JP4   | pins 1 & 2 |
   |   | installed                        |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | 80487SX or ODP486SX upgrade      |  JP4   | pins 2 & 3 |
   |   | installed                        |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP6   |    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) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+