(TXT) View Source
       
       # AIM MOTHERBOARD COMPANY
       
          486 VESA
       
          Processor         80486SX/80487SX/80486DX/80486DX2             
          Processor Speed   20/25/33/50(internal)/50/66(internal)MHz     
          Chip Set          UNI                                          
          Max. Onboard DRAM 128MB                                        
          Cache             32/64/128/256KB                              
          BIOS              AMI                                          
          Dimensions        254mm x 218mm                                
          I/O Options       32-bit VESA local bus slots (3)              
          NPU Options       None                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | External battery  |    J4    | Turbo switch     |   JP17   |
          |-------------------+----------+------------------+----------|
          | Power LED &       |    J5    | 32-bit VESA      |    S1    |
          | keylock           |          | Local bus slots  |          |
          |-------------------+----------+------------------+----------|
          | Speaker           |    J6    | 32-bit VESA      |    S2    |
          |                   |          | Local bus slots  |          |
          |-------------------+----------+------------------+----------|
          | Reset switch      |   JP18   | 32-bit VESA      |    S3    |
          |                   |          | Local bus slots  |          |
          |-------------------+----------+------------------+----------|
          | Turbo LED         |   JP16   |                  |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Monitor type select color        |  JP1   |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select monochrome   |  JP1   |    Open    |
          |---+----------------------------------+--------+------------|
          | » | CMOS memory normal operation     |  JP2   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |  JP2   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP20  |   Closed   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | V-L bus clock select - normal    |  JP43  | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | V-L bus clock select - adjusted  |  JP43  | pins 1 & 2 |
          |   |                                  |        |   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) 1M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       17MB       |     (4) 4M x 9     |    (4) 256K 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) 16M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       68MB       |    (4) 16M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       80MB       |    (4) 16M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |      128MB       |    (4) 16M x 9     |    (4) 16M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |    Type    |           JP4           |  JP19  |    JP44    |
          |------------+-------------------------+--------+------------|
          |  80486SX   |    pins 5 & 6 closed    |  Open  | pins 2 & 3 |
          |            |                         |        |   closed   |
          |------------+-------------------------+--------+------------|
          |  80487SX   | pins 2 & 3, 4 & 5, 6 &  |  Open  | pins 2 & 3 |
          |            |        7 closed         |        |   closed   |
          |------------+-------------------------+--------+------------|
          | 80486DX/33 | pins 1 & 2, 4 & 5, 6 &  |  Open  | pins 2 & 3 |
          |            |        7 closed         |        |   closed   |
          |------------+-------------------------+--------+------------|
          | 80486DX/50 | pins 1 & 2, 4 & 5, 6 &  | Closed | pins 1 & 2 |
          |            |        7 closed         |        |   closed   |
          |------------+-------------------------+--------+------------|
          |  80486DX2  | pins 1 & 2, 4 & 5, 6 &  |  Open  | pins 2 & 3 |
          |            |        7 closed         |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |    Speed    |     JP29      |     JP30      |     JP31     |
          |-------------+---------------+---------------+--------------|
          |    20MHz    |     Open      |    Closed     |    Closed    |
          |-------------+---------------+---------------+--------------|
          |    25Mhz    |    Closed     |     Open      |    Closed    |
          |-------------+---------------+---------------+--------------|
          |    33MHz    |    Closed     |    Closed     |     Open     |
          |-------------+---------------+---------------+--------------|
          |   50i MHz   |     Open      |    Closed     |     Open     |
          |-------------+---------------+---------------+--------------|
          |    50MHz    |    Closed     |     Open      |    Closed    |
          |-------------+---------------+---------------+--------------|
          |   66i MHz   |    Closed     |    Closed     |     Open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size  |  JP6   |  JP7   |  JP9   |          JP11           |
          |-------+--------+--------+--------+-------------------------|
          | 32KB  |  Open  |  Open  |  Open  |    pins 2 & 3 closed    |
          |-------+--------+--------+--------+-------------------------|
          | 64KB  |  Open  | Closed |  Open  |    pins 1 & 2 closed    |
          |-------+--------+--------+--------+-------------------------|
          | 128KB |  Open  | Closed | Closed |  pins 1 & 2 and 3 & 4   |
          |       |        |        |        |         closed          |
          |-------+--------+--------+--------+-------------------------|
          | 256KB | Closed | Closed | Closed |  pins 1 & 2 and 4 & 5   |
          |       |        |        |        |         closed          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     VESA CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Setting     |     JP40     |     JP41     |    JP42     |
          |----------------+--------------+--------------+-------------|
          | V-L bus master |     Open     |     Open     |    Open     |
          |----------------+--------------+--------------+-------------|
          | V-L bus slave  |    Closed    |    Closed    |   Closed    |
          +------------------------------------------------------------+