AIM MOTHERBOARD COMPANY
=======================

   AIM486CQ

   Processor         80486SX/80487SX/80486DX                      
   Processor Speed   20/25/33/50MHz                               
   Chip Set          VLSI                                         
   Max. onboard DRAM 32MB                                         
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        330mm x 218mm                                
   I/O Options       None                                         
   NPU Options       4167                                         

<gopher://bitreich.org/I/th99/m/A-B/31659-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |   JP5    | Reset switch      |   JP32   |
   |------------------+----------+-------------------+----------|
   | Turbo switch     |   JP30   | Speaker           |   JP33   |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |   JP31   | Power LED &       |   JP34   |
   |                  |          | keylock           |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Jumper/Switch |  Position  |
   |-------------------------------+---------------+------------|
   |>> | Monitor type select color |      JP1      |   Closed   |
   |---+---------------------------+---------------+------------|
   |   | Monitor type select       |      JP1      |    Open    |
   |   | monochrome                |               |            |
   |---+---------------------------+---------------+------------|
   |>> | CMOS memory normal        |      JP6      | pins 1 & 2 |
   |   | operation                 |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | CMOS memory clear         |      JP6      | pins 2 & 3 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | NPU select 0 wait states  |     JP18      |    Open    |
   |---+---------------------------+---------------+------------|
   |   | NPU select 1 wait state   |     JP18      |   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     |
   +------------------------------------------------------------+

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

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |  JP11  |  JP12  |  JP13  |  JP14  |  JP40  | JP41  |
   |-------+--------+--------+--------+--------+--------+-------|
   | 64KB  |  Open  |  Open  |  Open  |  Open  |  Open  | pins  |
   |       |        |        |        |        |        | 2 & 3 |
   |-------+--------+--------+--------+--------+--------+-------|
   | 128KB |  Open  | pins 1 | pins 2 | Closed |  Open  | pins  |
   |       |        |  & 2   |  & 3   |        |        | 1 & 2 |
   |-------+--------+--------+--------+--------+--------+-------|
   | 256KB | Closed | pins 1 | pins 1 | Closed | Closed | pins  |
   |       |        |  & 2   |  & 2   |        |        | 2 & 3 |
   |------------------------------------------------------------|
   | Note:Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |   Speed    |       JP15        |    JP22     |    JP23     |
   |------------+-------------------+-------------+-------------|
   |   20MHz    | pins 2 & 3 closed |    Open     |    Open     |
   |------------+-------------------+-------------+-------------|
   |   25MHz    | pins 1 & 2 closed |   Closed    |    Open     |
   |------------+-------------------+-------------+-------------|
   |   33MHz    | pins 1 & 2 closed |    Open     |   Closed    |
   |------------+-------------------+-------------+-------------|
   |   50MHz    | pins 1 & 2 closed |   Closed    |   Closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |  TYPE   |        JP2        |    JP3     |  JP7   |  JP8   |
   |---------+-------------------+------------+--------+--------|
   | 80486SX |       Open        | pins 2 & 3 |  Open  | Closed |
   |         |                   |   closed   |        |        |
   |---------+-------------------+------------+--------+--------|
   | 80487SX | pins 1 & 2 closed | pins 1 & 2 | Closed |  Open  |
   |         |                   |   closed   |        |        |
   |---------+-------------------+------------+--------+--------|
   | 80486DX | pins 2 & 3 closed | pins 2 & 3 |  Open  | Closed |
   |         |                   |   closed   |        |        |
   +------------------------------------------------------------+