QDI COMPUTER, INC.
==================

   UL486 P3 PC

   Processor  80486SX/80486DX/80486DX2/80486DX4                      
   Processor  25/33/40/50(internal)/50/66(internal)/100(internal)MHz 
   Speed      
   Chip Set   FOREX                                                  
   Max.       32MB                                                   
   Onboard    
   DRAM       
   Cache      32/64/128/256KB                                        
   BIOS       AMI                                                    
   Dimensions 254mm x 218mm                                          
   I/O        32-bit VESA local bus slots (2), green PC connector    
   Options    
   NPU        None                                                   
   Options    

<gopher://bitreich.org/I/th99/m/P-R/32451-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |    J2    | Speaker           |    J8    |
   |------------------+----------+-------------------+----------|
   | Reset switch     |    J4    | Green PC          |   JP19   |
   |                  |          | connector         |          |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |    J5    | Green PC          |   JP20   |
   |                  |          | connector         |          |
   |------------------+----------+-------------------+----------|
   | Turbo switch     |    J6    | Green PC          |   JP21   |
   |                  |          | connector         |          |
   |------------------+----------+-------------------+----------|
   | Power LED &      |    J7    | 32-bit VESA local |  SL1 -   |
   | keylock          |          | bus slots         |   SL3    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Battery type select internal     |   J1   |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | Battery type select external     |   J1   |    Open    |
   |---+----------------------------------+--------+------------|
   |>> | Power good signal detect from    |  JP1   | pins 1 & 2 |
   |   | power supply                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Power good signal detect from    |  JP1   | pins 2 & 3 |
   |   | board                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | VESA card select normal          |  JP3   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | VESA card select Viper 9000 card |  JP3   | pins 2 & 3 |
   |   | only                             |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP7   |    Open    |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP8   |    Open    |
   |   | alter                            |        |            |
   |---+----------------------------------+--------+------------|
   |>> | DRAM bank select Bank 0 or Banks |  JP27  | pins 1 & 2 |
   |   | 1 & 2 used                       |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | DRAM bank select Banks 0, 1, & 2 |  JP27  | pins 2 & 3 |
   |   | used                             |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |    1MB     | (4) 256K x 9  |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    2MB     |     NONE      | (1) 256K x 36 | (1) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    2MB     | (4) 256K x 9  |     NONE      | (1) 256K x 36 |
   |------------+---------------+---------------+---------------|
   |    4MB     |     NONE      | (1) 512K x 36 | (1) 512K x 36 |
   |------------+---------------+---------------+---------------|
   |    4MB     |     NONE      |  (1) 1M x 36  |     NONE      |
   |------------+---------------+---------------+---------------|
   |    4MB     |  (4) 1M x 9   |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    6MB     |     NONE      |  (1) 1M x 36  | (1) 512K x 36 |
   |------------+---------------+---------------+---------------|
   |    6MB     |  (4) 1M x 9   |     NONE      | (1) 512K x 36 |
   |------------+---------------+---------------+---------------|
   |    8MB     |     NONE      |  (1) 1M x 36  |  (1) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    8MB     |  (4) 1M x 9   |     NONE      |  (1) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    12MB    |     NONE      |  (1) 2M x 36  |  (1) 1M x 36  |
   |------------+---------------+---------------+---------------|
   |    12MB    |  (4) 1M x 9   |     NONE      |  (1) 2M x 36  |
   |------------+---------------+---------------+---------------|
   |    16MB    |     NONE      |  (1) 2M x 36  |  (1) 2M x 36  |
   |------------+---------------+---------------+---------------|
   |    16MB    |  (4) 4M x 9   |     NONE      |     NONE      |
   |------------+---------------+---------------+---------------|
   |    24MB    |     NONE      |  (1) 4M x 36  |  (1) 2M x 36  |
   |------------+---------------+---------------+---------------|
   |    24MB    |  (4) 4M x 9   |     NONE      |  (1) 2M x 36  |
   |------------+---------------+---------------+---------------|
   |    32MB    |     NONE      |  (1) 4M x 36  |  (1) 4M x 36  |
   |------------+---------------+---------------+---------------|
   |    32MB    |  (4) 4M x 9   |     NONE      |  (1) 4M x 36  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |      TAG      |
   |------------+---------------+---------------+---------------|
   |    32KB    |  (4) 8K x 8   |     NONE      |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |    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  |
   |------------------------------------------------------------|
   | Note: The actual location of the cache banks may vary.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |   JP9   |  JP10   |  JP11   |  JP12   |  JP13   |
   |----------+---------+---------+---------+---------+---------|
   |   32KB   |  2 & 3  |  Open   |  Open   |  Open   |  Open   |
   |----------+---------+---------+---------+---------+---------|
   |   64KB   |  1 & 2  |  Open   |  Open   |  Open   | Closed  |
   |----------+---------+---------+---------+---------+---------|
   |  128KB   |  2 & 3  |  2 & 3  |  Open   | Closed  | Closed  |
   |----------+---------+---------+---------+---------+---------|
   |  256KB   |  1 & 2  |  1 & 2  | Closed  | Closed  | Closed  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Type    |  JP14  |     JP15     |          U50           |
   |-----------+--------+--------------+------------------------|
   |  80486SX  |  Open  |    2 & 3     |      3 & 6, 4 & 5      |
   |-----------+--------+--------------+------------------------|
   |  80486DX  | 1 & 2  | 1 & 2, 3 & 4 |      3 & 6, 4 & 5      |
   |-----------+--------+--------------+------------------------|
   | 80486DX2  | 1 & 2  | 1 & 2, 3 & 4 |      3 & 6, 4 & 5      |
   |-----------+--------+--------------+------------------------|
   | 80486DX4  | 1 & 2  | 1 & 2, 3 & 4 | uses voltage converter |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |     Speed     |     JP4      |     JP5      |     JP6      |
   |---------------+--------------+--------------+--------------|
   |     25MHz     |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |     33MHz     |    Closed    |    Closed    |    Closed    |
   |---------------+--------------+--------------+--------------|
   |    50iMHz     |    Closed    |     Open     |     Open     |
   |---------------+--------------+--------------+--------------|
   |     50MHz     |     Open     |     Open     |    Closed    |
   |---------------+--------------+--------------+--------------|
   |    66iMHz     |    Closed    |    Closed    |    Closed    |
   |---------------+--------------+--------------+--------------|
   |    100iMHz    |    Closed    |    Closed    |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               CPU CLOCK SPEED CONFIGURATION                |
   |------------------------------------------------------------|
   |           Speed            |             JP22              |
   |----------------------------+-------------------------------|
   |            1.5x            |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |             2x             |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |             3x             |             Open              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BUS SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |           CPU speed           |            JP16            |
   |-------------------------------+----------------------------|
   |           <= 33MHz            |            Open            |
   |-------------------------------+----------------------------|
   |            > 33MHz            |           Closed           |
   +------------------------------------------------------------+