MICROMEDIA TECHNOLOGIES, INC.
=============================

   486-VLS

   Processor         80486SX/80486DX/80486DX2                     
   Processor Speed   25/33/40/50(internal)/50/66(internal)MHz     
   Chip Set          SIS                                          
   Max. Onboard DRAM 32MB                                         
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        230mm x 218mm                                
   I/O Options       32-bit VESA local bus slots (2)              
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/M-O/31691-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose      | Location | Purpose               | Location |
   |--------------+----------+-----------------------+----------|
   | Power LED &  |   CN1    | Turbo switch          |   CN5    |
   | keylock      |          |                       |          |
   |--------------+----------+-----------------------+----------|
   | Reset switch |   CN2    | External battery      |   CN6    |
   |--------------+----------+-----------------------+----------|
   | Speaker      |   CN3    | 32-bit VESA Local bus |    S1    |
   |              |          | slot                  |          |
   |--------------+----------+-----------------------+----------|
   | Turbo LED    |   CN4    | 32-bit VESA Local bus |    S2    |
   |              |          | slot                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function             |  Jumper   |  Position   |
   |----------------------------------+-----------+-------------|
   |>> | 80486 (PQFP)                 |   JP16    |    Open     |
   |---+------------------------------+-----------+-------------|
   |   | 80486(PGA)                   |   JP16    |   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        |
   |------------------+--------------------+--------------------|
   |       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     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Type    |       JP13        |       JP14        |  JP15  |
   |-----------+-------------------+-------------------+--------|
   |  80486SX  |       Open        | pins 2 & 3 closed |  Open  |
   |-----------+-------------------+-------------------+--------|
   |  80487SX  | pins 2 & 3 closed | pins 1 & 2 closed | Closed |
   |-----------+-------------------+-------------------+--------|
   |  80486DX  | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
   |-----------+-------------------+-------------------+--------|
   | 80486DX2  | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |    Type     |     JP20      |     JP21      |     JP22     |
   |-------------+---------------+---------------+--------------|
   |    25MHz    |    Closed     |     Open      |     Open     |
   |-------------+---------------+---------------+--------------|
   |    33MHz    |    Closed     |    Closed     |    Closed    |
   |-------------+---------------+---------------+--------------|
   |    40MHz    |    Closed     |    Closed     |     Open     |
   |-------------+---------------+---------------+--------------|
   |    50MHz    |     Open      |     Open      |    Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |  JP1  |  JP2  |  JP3  |  JP4  | JP5  | JP6  | JP7  |
   |-------+-------+-------+-------+-------+------+------+------|
   | 64KB  | pins  | pins  | pins  | pins  | pins | N/A  | pins |
   |       | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 &  |      | 1 &  |
   |       |       |       |       |       |  3   |      |  2   |
   |-------+-------+-------+-------+-------+------+------+------|
   | 128KB | pins  | pins  | pins  | pins  | pins | pins | pins |
   |       | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | 1 &  | 1 &  | 2 &  |
   |       |       |       |       |       |  2   |  2   |  3   |
   |-------+-------+-------+-------+-------+------+------+------|
   | 256KB | pins  | pins  | pins  | pins  | pins | pins | pins |
   |       | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 &  | 2 &  | 2 &  |
   |       |       |       |       |       |  3   |  3   |  3   |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |   VESA WAIT STATE/BUS SPEED (S1 &AMP; S2) CONFIGURATION    |
   |------------------------------------------------------------|
   | CPU speed |   S1/JP8    |  S1/JP9  |  S2/JP10   | S2/JP11  |
   |-----------+-------------+----------+------------+----------|
   |  GBP 33MHz  | pins 1 & 2  |   N/A    | pins 1 & 2 |   N/A    |
   |           |   closed    |          |   closed   |          |
   |-----------+-------------+----------+------------+----------|
   |  > 33MHz  | pins 2 & 3  |   N/A    | pins 2 & 3 |   N/A    |
   |           |   closed    |          |   closed   |          |
   |-----------+-------------+----------+------------+----------|
   |  0 wait   |     N/A     | pins 1 & |    N/A     | pins 1 & |
   |  states   |             | 2 closed |            | 2 closed |
   |-----------+-------------+----------+------------+----------|
   |  1 wait   |     N/A     | pins 2 & |    N/A     | pins 2 & |
   |   state   |             | 3 closed |            | 3 closed |
   +------------------------------------------------------------+