QUICKPATH SYSTEMS, INC.
=======================

   486SX/DX MOTHERBOARD

   Processor          80486SX/80487SX/80486DX/80486DX2            
   Processor Speed    16/20/25/33/50(internal)/50/66(internal)MHz 
   Chip Set           OPTI                                        
   Max. Onboard DRAM  32MB                                        
   Cache              64/256KB                                    
   BIOS               MR                                          
   Dimensions         330mm x 218mm                               
   I/O Options        None                                        
   NPU Options        4167                                        

<gopher://bitreich.org/I/th99/m/P-R/31053-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |   KEY    | Speaker        |   SPK    |
   |---------------------+----------+----------------+----------|
   | Turbo LED           |   LED    | Turbo switch   |   TSW    |
   |---------------------+----------+----------------+----------|
   | Reset switch        |   RST    |                |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function             | Jumper |    Position    |
   |----------------------------------+--------+----------------|
   |>> | Bus speed select ATCLK/4     |  JP2   |      Open      |
   |---+------------------------------+--------+----------------|
   |   | Bus speed select ATCLK/6     |  JP2   |     Closed     |
   |---+------------------------------+--------+----------------|
   |>> | Password check enabled       |  JP6   |     Closed     |
   |---+------------------------------+--------+----------------|
   |   | Password check disabled      |  JP6   |      Open      |
   |---+------------------------------+--------+----------------|
   |>> | CMOS memory normal operation |  JP7   |   pins 2 & 3   |
   |   |                              |        |     closed     |
   |---+------------------------------+--------+----------------|
   |   | CMOS memory clear            |  JP7   |   pins 1 & 2   |
   |   |                              |        |     closed     |
   |---+------------------------------+--------+----------------|
   |>> | Battery type select internal |  JP13  |   pins 1 & 2   |
   |   |                              |        |     closed     |
   |---+------------------------------+--------+----------------|
   |   | Battery type select external |  JP13  |   pins 2 & 3   |
   |   |                              |        |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |            64KB            |          (9) 8K x 8           |
   |----------------------------+-------------------------------|
   |           256KB            |          (9) 32K x 8          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size    |    JP9     |    JP10    |   JP11   |   JP12    |
   |-----------+------------+------------+----------+-----------|
   |   64KB    |    Open    |    Open    |   Open   |   Open    |
   |-----------+------------+------------+----------+-----------|
   |   256KB   |   Closed   |   Closed   |   Open   |  Closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU CONFIGURATION                      |
   |------------------------------------------------------------|
   |      Type      |  OSC1  |  JP1   |  JP3   |  JP4   |  JP5  |
   |----------------+--------+--------+--------+--------+-------|
   | 80486SX-16MHz  | 32MHz  | 2 & 3  | 2 & 3  |  Open  | Open  |
   |----------------+--------+--------+--------+--------+-------|
   | 80486SX-20MHz  | 40MHz  | 2 & 3  | 2 & 3  |  Open  | Open  |
   |----------------+--------+--------+--------+--------+-------|
   | 80486SX-25MHz  | 50MHz  | 2 & 3  | 2 & 3  |  Open  | Open  |
   |----------------+--------+--------+--------+--------+-------|
   | 80487SX-20MHz  | 40MHz  | 2 & 3  | 1 & 2  | Closed | 1 & 2 |
   |----------------+--------+--------+--------+--------+-------|
   | 80486DX-25MHz  | 50MHz  | 2 & 3  | 1 & 2  | Closed | 2 & 3 |
   |----------------+--------+--------+--------+--------+-------|
   | 80486DX-33MHz  | 66MHz  | 2 & 3  | 1 & 2  | Closed | 2 & 3 |
   |----------------+--------+--------+--------+--------+-------|
   | 80486DX-50MHz  | 50MHz  | 1 & 2  | 1 & 2  | Closed | 2 & 3 |
   |----------------+--------+--------+--------+--------+-------|
   | 80486DX2-50MHz | 25MHz  | 2 & 3  | 1 & 2  | Closed | 2 & 3 |
   |----------------+--------+--------+--------+--------+-------|
   | 80486DX2-66MHz | 33MHz  | 2 & 3  | 1 & 2  | Closed | 2 & 3 |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+