BUFFALO PRODUCTS, INC.
======================

   486UV AT

   Processor      80486SX/80487SX/80486DX                         
   Processor      20/25/33/50(internal)/50MHz                     
   Speed          
   Chip Set       UMC                                             
   Max. Onboard   32MB                                            
   DRAM           
   Cache          64/128/256KB                                    
   BIOS           AMI/Phoenix                                     
   Dimensions     330mm x 218mm                                   
   I/O Options    32-bit system memory card, 32-bit local bus     
                  slot                                            
   NPU Options    4167                                            

<gopher://bitreich.org/I/th99/m/A-B/31545-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | External battery  |    J1    | Turbo switch     |    J6    |
   |-------------------+----------+------------------+----------|
   | Power LED &       |    J3    | Turbo LED        |    J7    |
   | keylock           |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |    J4    | 32-bit system    |   JME1   |
   |                   |          | memory card      |          |
   |-------------------+----------+------------------+----------|
   | Reset switch      |    J5    | 32-bit VESA      |   SL1    |
   |                   |          | Local bus slot   |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper  | Position  |
   |--------------------------------------+---------+-----------|
   |>> | Monitor type select color        |  JP10   |   Open    |
   |---+----------------------------------+---------+-----------|
   |   | Monitor type select monochrome   |  JP10   |  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) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |      DRAM CONFIGURATION (WITH MEMORY CARD INSTALLED)       |
   |------------------------------------------------------------|
   | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
   |------+-------------+-------------+------------+------------|
   | 1MB  | (4) 256K x  |    NONE     |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 2MB  | (4) 256K x  | (4) 256K x  |    NONE    |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 3MB  | (4) 256K x  | (4) 256K x  | (4) 256K x |    NONE    |
   |      |      9      |      9      |     9      |            |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (4) 256K x  | (4) 256K x  | (4) 256K x | (4) 256K x |
   |      |      9      |      9      |     9      |     9      |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (4) 1M x 9  |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 5MB  | (4) 256K x  | (4) 1M x 9  |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 6MB  | (4) 256K x  | (4) 256K x  | (4) 1M x 9 |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 8MB  | (4) 1M x 9  | (4) 1M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 9MB  | (4) 256K x  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 10MB | (4) 256K x  | (4) 256K x  | (4) 1M x 9 | (4) 1M x 9 |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 12MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 16MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |
   |------+-------------+-------------+------------+------------|
   | 16MB | (4) 4M x 9  |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 20MB | (4) 1M x 9  | (4) 4M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 24MB | (4) 1M x 9  | (4) 1M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 32MB | (4) 4M x 9  | (4) 4M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 36MB |    NONE     | (4) 4M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 40MB |    NONE     |    NONE     | (4) 4M x 9 | (4) 4M x 9 |
   |------+-------------+-------------+------------+------------|
   | 48MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 64MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       64KB       |     (4) 8K x 8     |     (4) 8K x 8     |
   |------------------+--------------------+--------------------|
   |      128KB       |    (4) 32K x 8     |        NONE        |
   |------------------+--------------------+--------------------|
   |      256KB       |    (4) 32K x 8     |    (4) 32K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |   JP13   |   JP14   |  JP16   |  JP17  |  JP18  |
   |----------+----------+----------+---------+--------+--------|
   |   64KB   |  1 & 2   |  1 & 2   |  2 & 3  | 1 & 2  | 1 & 2  |
   |----------+----------+----------+---------+--------+--------|
   |  128KB   |  2 & 3   |  1 & 2   |  2 & 3  | 2 & 3  | 1 & 2  |
   |----------+----------+----------+---------+--------+--------|
   |  256KB   |  1 & 2   |  2 & 3   |  2 & 3  | 2 & 3  | 2 & 3  |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Speed   |   JP1    |      JP2      |     JP3     |  JP8   |
   |----------+----------+---------------+-------------+--------|
   |  20MHz   |   Open   |  pins 2 & 3   | pins 3 & 4  |  See   |
   |          |          |    closed     |   closed    |  note  |
   |----------+----------+---------------+-------------+--------|
   |  25MHz   |   Open   |  pins 2 & 3   | pins 3 & 4  |  See   |
   |          |          |    closed     |   closed    |  note  |
   |----------+----------+---------------+-------------+--------|
   |  33MHz   |  Closed  |  pins 1 & 2   | pins 1 & 2  |  Open  |
   |          |          |    closed     |   closed    |        |
   |----------+----------+---------------+-------------+--------|
   |  50MHz   |  Closed  |  pins 1 & 2   | pins 1 & 2  |  Open  |
   |          |          |    closed     |   closed    |        |
   |------------------------------------------------------------|
   | Note:For 20MHz 486SX/487SX CPU, U14 oscillator frequency   |
   | can be 20MHz or 40mhz. If U14 oscillator frequency is      |
   | 20mhz, open JP8. If U14 oscillator frequency is 40 Mhz,    |
   | close JP8                                                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     VESA CONFIGURATION                     |
   |------------------------------------------------------------|
   |             Type             |  JP23   |  JP24   |  JP25   |
   |------------------------------+---------+---------+---------|
   |    Weitek 4167 installed     |  Open   | Closed  |  Open   |
   |------------------------------+---------+---------+---------|
   |     Local bus installed      | Closed  |  Open   |  Open   |
   |------------------------------+---------+---------+---------|
   | Weitek & Local bus installed |  Open   |  Open   | Closed  |
   +------------------------------------------------------------+