MODULAR CIRCUIT TECHNOLOGY
==========================

   MCT-M486EV-66

   Processor         80486SX/80486DX/80486DX2/Pentium Overdrive   
   Processor Speed   25/33/50(internal)/50/66(internal)MHz        
   Chip Set          SIS                                          
   Max. Onboard DRAM 128MB                                        
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        330mm x 218mm                                
   I/O Options       32-bit VESA local bus slots (2)              
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/M-O/32478-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose      | Location | Purpose              | Location  |
   |--------------+----------+----------------------+-----------|
   | Turbo LED    |    J3    | Speaker              |    J6     |
   |--------------+----------+----------------------+-----------|
   | Turbo switch |    J4    | Power LED & keylock  |    J7     |
   |--------------+----------+----------------------+-----------|
   | Reset switch |    J5    | 32-bit VESA local    | SL1 & SL2 |
   |              |          | bus slots            |           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper  | Position  |
   |--------------------------------------+---------+-----------|
   |>> | Monitor type select monochrome   |  JP14   |  Closed   |
   |---+----------------------------------+---------+-----------|
   |   | Monitor type select color        |  JP14   |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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     |
   |------------------+--------------------+--------------------|
   |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       17MB       |    (4) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (4) 16M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       65MB       |    (4) 256K x 9    |    (4) 16M x 9     |
   |------------------+--------------------+--------------------|
   |       65MB       |    (4) 16M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       68MB       |     (4) 1M x 9     |    (4) 16M x 9     |
   |------------------+--------------------+--------------------|
   |       68MB       |    (4) 16M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       80MB       |     (4) 4M x 9     |    (4) 16M x 9     |
   |------------------+--------------------+--------------------|
   |       80MB       |    (4) 16M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (4) 16M x 9     |    (4) 16M x 9     |
   +------------------------------------------------------------+

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

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size  |  JP3   |  JP4   |  JP10  |  JP11  | JP12  | JP13  |
   |--------+--------+--------+--------+--------+-------+-------|
   |  64KB  | 1 & 2  | 1 & 2  | 1 & 2  | 2 & 3  | 1 & 2 | 1 & 2 |
   |--------+--------+--------+--------+--------+-------+-------|
   | 128KB  | 2 & 3  | 1 & 2  | 2 & 3  | 1 & 2  | 1 & 2 | 2 & 3 |
   |--------+--------+--------+--------+--------+-------+-------|
   | 256KB  | 2 & 3  | 2 & 3  | 2 & 3  | 4 & 5  | 2 & 3 | 2 & 3 |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |       Type        |        JP8         |        JP9        |
   |-------------------+--------------------+-------------------|
   |      80486SX      | pins 2 & 3 closed  |       Open        |
   |-------------------+--------------------+-------------------|
   |      80486DX      | pins 1 & 2, 3 & 4  | pins 1 & 2 closed |
   |                   |       closed       |                   |
   |-------------------+--------------------+-------------------|
   |     80486DX2      | pins 1 & 2, 3 & 4  | pins 1 & 2 closed |
   |                   |       closed       |                   |
   |-------------------+--------------------+-------------------|
   | Pentium Overdrive | pins 1 & 2, 3 & 4  | pins 2 & 3 closed |
   |                   |       closed       |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               VESA WAIT STATE CONFIGURATION                |
   |------------------------------------------------------------|
   |          Wait states          |            JP6             |
   |-------------------------------+----------------------------|
   |         0 wait states         |            Open            |
   |-------------------------------+----------------------------|
   |         1 wait state          |           Closed           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BUS SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |           CPU speed           |            JP5             |
   |-------------------------------+----------------------------|
   |           <= 33MHz            |            Open            |
   |-------------------------------+----------------------------|
   |            > 33MHz            |           Closed           |
   +------------------------------------------------------------+