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       # TMC RESEARCH CORPORATION
       
          PCI48AF (VER. 3.0)
       
       Processor  SL80486SX/80486SX/SL80486SX2/SL80486DX/80486DX/CX486M7/                                                   
                  TI486DX2/UMCU5/(SL)AM486DX2/AM486DX2/SL80486DX2/80486DX2/CXM1/(SL)AM486DX4/AM486DX4/80486DX4/P24D/Pentium 
                  Overdrive                                                                                                 
       Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/100(internal)/ 120(internal)MHz           
       Speed      
       Chip Set   ALI                                                                                                       
       Max.       128MB                                                                                                     
       Onboard    
       DRAM       
       Cache      128/256/512KB                                                                                             
       BIOS       Unidentified                                                                                              
       Dimensions 254mm x 218mm                                                                                             
       I/O        PS/2 mouse interface, parallel port, serial ports (2), 32-bit PCI slots (4), floppy drive interface, IDE  
       Options    interface (2)                                                                                             
       NPU        None                                                                                                      
       Options    
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose            | Location | Purpose       |  Location  |
          |--------------------+----------+---------------+------------|
          | Serial port 1      |    J1    | Speaker       | JP23 pins  |
          |                    |          |               |   1 - 4    |
          |--------------------+----------+---------------+------------|
          | Serial port 2      |    J2    | Turbo switch  | JP23 pins  |
          |                    |          |               |   7 & 17   |
          |--------------------+----------+---------------+------------|
          | Parallel port      |    J3    | Turbo LED     | JP23 pins  |
          |                    |          |               |   8 & 18   |
          |--------------------+----------+---------------+------------|
          | Floppy drive       |    J4    | Reset switch  | JP23 pins  |
          | interface          |          |               |   9 & 19   |
          |--------------------+----------+---------------+------------|
          | IDE interface 1    |    J5    | Power LED &   | JP23 pins  |
          |                    |          | keylock       |  11 - 15   |
          |--------------------+----------+---------------+------------|
          | IDE interface 2    |    J6    | IDE interface | JP23 pins  |
          |                    |          | LED           |  10 & 20   |
          |--------------------+----------+---------------+------------|
          | PS/2 mouse         |   JP3    | 32-bit PCI    | PC1 - PC4  |
          | interface          |          | slots         |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function             | Jumper |    Position    |
          |----------------------------------+--------+----------------|
          | » | CMOS memory normal operation |  JP22  |   pins 1 & 2   |
          |   |                              |        |     closed     |
          |---+------------------------------+--------+----------------|
          |   | CMOS memory clear            |  JP22  |   pins 2 & 3   |
          |   |                              |        |     closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
          |-------+-------------+------------+------------+------------|
          |  2MB  | (1) 256K x  | (1) 256K x |    NONE    |    NONE    |
          |       |     36      |     36     |            |            |
          |-------+-------------+------------+------------+------------|
          |  2MB  | (1) 512K x  |    NONE    |    NONE    |    NONE    |
          |       |     36      |            |            |            |
          |-------+-------------+------------+------------+------------|
          |  4MB  | (1) 1M x 36 |    NONE    |    NONE    |    NONE    |
          |-------+-------------+------------+------------+------------|
          |  4MB  | (1) 256K x  | (1) 256K x | (1) 256K x | (1) 256K x |
          |       |     36      |     36     |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          |  4MB  | (1) 512K x  |    NONE    | (1) 256K x | (1) 256K x |
          |       |     36      |            |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          |  4MB  | (1) 512K x  |    NONE    | (1) 512K x |    NONE    |
          |       |     36      |            |     36     |            |
          |-------+-------------+------------+------------+------------|
          |  5MB  | (1) 256K x  |  (1) 1M x  |    NONE    |    NONE    |
          |       |     36      |     36     |            |            |
          |-------+-------------+------------+------------+------------|
          |  6MB  | (1) 256K x  | (1) 256K x |  (1) 1M x  |    NONE    |
          |       |     36      |     36     |     36     |            |
          |-------+-------------+------------+------------+------------|
          |  6MB  | (1) 512K x  |    NONE    |  (1) 1M x  |    NONE    |
          |       |     36      |            |     36     |            |
          |-------+-------------+------------+------------+------------|
          |  8MB  | (1) 1M x 36 |  (1) 1M x  |    NONE    |    NONE    |
          |       |             |     36     |            |            |
          |-------+-------------+------------+------------+------------|
          |  8MB  | (1) 2M x 36 |    NONE    |    NONE    |    NONE    |
          |-------+-------------+------------+------------+------------|
          | 10MB  | (1) 256K x  | (1) 256K x |  (1) 1M x  |  (1) 1M x  |
          |       |     36      |     36     |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          | 10MB  | (1) 512K x  |    NONE    |  (1) 1M x  |  (1) 1M x  |
          |       |     36      |            |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          | 10MB  | (1) 512K x  |    NONE    |  (1) 2M x  |    NONE    |
          |       |     36      |            |     36     |            |
          |-------+-------------+------------+------------+------------|
          | 12MB  | (1) 1M x 36 |    NONE    |  (1) 2M x  |    NONE    |
          |       |             |            |     36     |            |
          |-------+-------------+------------+------------+------------|
          | 16MB  | (1) 4M x 36 |    NONE    |    NONE    |    NONE    |
          |-------+-------------+------------+------------+------------|
          | 16MB  | (1) 1M x 36 |  (1) 1M x  |  (1) 1M x  |  (1) 1M x  |
          |       |             |     36     |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          | 16MB  | (1) 2M x 36 |    NONE    |  (1) 1M x  |  (1) 1M x  |
          |       |             |            |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          | 16MB  | (1) 2M x 36 |    NONE    |  (1) 2M x  |    NONE    |
          |       |             |            |     36     |            |
          |-------+-------------+------------+------------+------------|
          | 17MB  | (1) 256K x  |  (1) 4M x  |    NONE    |    NONE    |
          |       |     36      |     36     |            |            |
          |-------+-------------+------------+------------+------------|
          | 20MB  | (1) 1M x 36 |  (1) 4M x  |    NONE    |    NONE    |
          |       |             |     36     |            |            |
          |-------+-------------+------------+------------+------------|
          | 32MB  | (1) 4M x 36 |  (1) 4M x  |    NONE    |    NONE    |
          |       |             |     36     |            |            |
          |-------+-------------+------------+------------+------------|
          | 32MB  | (1) 8M x 36 |    NONE    |    NONE    |    NONE    |
          |-------+-------------+------------+------------+------------|
          | 64MB  |  (1) 16M x  |    NONE    |    NONE    |    NONE    |
          |       |     36      |            |            |            |
          |-------+-------------+------------+------------+------------|
          | 64MB  | (1) 4M x 36 |  (1) 4M x  |  (1) 4M x  |  (1) 4M x  |
          |       |             |     36     |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          | 64MB  | (1) 8M x 36 |    NONE    |  (1) 4M x  |  (1) 4M x  |
          |       |             |            |     36     |     36     |
          |-------+-------------+------------+------------+------------|
          | 64MB  | (1) 8M x 36 |    NONE    |  (1) 8M x  |    NONE    |
          |       |             |            |     36     |            |
          |-------+-------------+------------+------------+------------|
          | 128MB |  (1) 16M x  | (1) 16M x  |    NONE    |    NONE    |
          |       |     36      |     36     |            |            |
          |-------+-------------+------------+------------+------------|
          | 128MB |  (1) 32M x  |    NONE    |    NONE    |    NONE    |
          |       |     36      |            |            |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |        TAG         |
          |------------------+--------------------+--------------------|
          |      128KB       |    (4) 32K x 8     |     (1) 8K x 8     |
          |------------------+--------------------+--------------------|
          |      256KB       |    (4) 64K x 8     |    (1) 16K x 8     |
          |------------------+--------------------+--------------------|
          |      512KB       |    (4) 128K x 8    |    (1) 32K x 8     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |       Size       |        JP4         |        JP5         |
          |------------------+--------------------+--------------------|
          |      128KB       | pins 2 & 3 closed  | pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |      256KB       | pins 2 & 3 closed  | pins 1 & 2 closed  |
          |------------------+--------------------+--------------------|
          |      512KB       | pins 1 & 2 closed  | pins 1 & 2 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |     Type     |  JP10   |  JP11   |  JP12  | JP13  |  JP14  |
          |--------------+---------+---------+--------+-------+--------|
          |  SL80486SX   |  1 & 2  |  1 & 2  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |   80486SX    |  1 & 2  |  1 & 2  |  Open  | 1 & 2 |  Open  |
          |--------------+---------+---------+--------+-------+--------|
          |  SL80486SX2  |  1 & 2  |  1 & 2  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |  SL80486DX   |  2 & 3  |  1 & 2  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |   80486DX    |  2 & 3  |  1 & 2  |  Open  | 1 & 2 |  Open  |
          |--------------+---------+---------+--------+-------+--------|
          |   CX486M7    |  2 & 3  |  1 & 2  | 5 & 6  | 5 & 6 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |   TI486DX2   |  2 & 3  |  1 & 2  | 5 & 6  | 5 & 6 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |    UMC U5    |  1 & 2  |  1 & 2  | 1 & 2  | 1 & 2 |  Open  |
          |--------------+---------+---------+--------+-------+--------|
          | SL AM486DX2  |  2 & 3  |  2 & 3  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |   AM486DX2   |  2 & 3  |  1 & 2  |  Open  | 1 & 2 |  Open  |
          |--------------+---------+---------+--------+-------+--------|
          |  SL80486DX2  |  2 & 3  |  1 & 2  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |   80486DX2   |  2 & 3  |  1 & 2  |  Open  | 1 & 2 |  Open  |
          |--------------+---------+---------+--------+-------+--------|
          |     CXM1     |  2 & 3  |  1 & 2  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          | SL AM486DX4  |  2 & 3  |  2 & 3  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |   AM486DX4   |  2 & 3  |  1 & 2  |  Open  | 1 & 2 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |   80486DX4   |  2 & 3  |  1 & 2  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |     P24D     |  2 & 3  |  2 & 3  | 3 & 4  | 3 & 4 | Closed |
          |--------------+---------+---------+--------+-------+--------|
          |     P24T     |  2 & 3  |  2 & 3  | 3 & 4  | 3 & 4 | Closed |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU TYPE CONFIGURATION (CON’T)               |
          |------------------------------------------------------------|
          |    Type     |  JP15  |    JP17    | JP18  | JP19  |  JP20  |
          |-------------+--------+------------+-------+-------+--------|
          |  SL80486SX  |  Open  |    Open    | 3 & 4 | Open  | Closed |
          |-------------+--------+------------+-------+-------+--------|
          |   80486SX   |  Open  |    Open    | Open  | Open  | Closed |
          |-------------+--------+------------+-------+-------+--------|
          | SL80486SX2  |  Open  |    Open    | 3 & 4 | Open  | Closed |
          |-------------+--------+------------+-------+-------+--------|
          |  SL80486DX  |  Open  |    Open    | 3 & 4 | 2 & 3 | Closed |
          |-------------+--------+------------+-------+-------+--------|
          |   80486DX   |  Open  |    Open    | Open  | 2 & 3 | Closed |
          |-------------+--------+------------+-------+-------+--------|
          |   CX486M7   |  Open  |   1 & 2    | 5 & 6 | 2 & 3 |  Open  |
          |-------------+--------+------------+-------+-------+--------|
          |  TI486DX2   |  Open  |   1 & 2    | 5 & 6 | 2 & 3 |  Open  |
          |-------------+--------+------------+-------+-------+--------|
          |   UMC U5    |  Open  |    Open    | 1 & 2 | Open  | Closed |
          |-------------+--------+------------+-------+-------+--------|
          | SL AM486DX2 |  Open  | 1 & 3, 5 & | 3 & 4 | 2 & 3 | Closed |
          |             |        |     6      |       |       |        |
          |-------------+--------+------------+-------+-------+--------|
          |  AM486DX2   | Closed |    Open    | Open  | 2 & 3 | Closed |
          |-------------+--------+------------+-------+-------+--------|
          | SL80486DX2  |  Open  |    Open    | 3 & 4 | 2 & 3 | Closed |
          |-------------+--------+------------+-------+-------+--------|
          |  80486DX2   |  Open  |    Open    | Open  | 2 & 3 | Closed |
          |-------------+--------+------------+-------+-------+--------|
          |    CXM1     |  Open  |   5 & 6    | 3 & 4 | 2 & 3 | Closed |
          |-------------+--------+------------+-------+-------+--------|
          | SL AM486DX4 |  Open  |   5 & 6    | 3 & 4 | 2 & 3 | Closed |
          |-------------+--------+------------+-------+-------+--------|
          |  AM486DX4   |  Open  |    Open    | Open  | 2 & 3 | Closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU TYPE CONFIGURATION (CON’T)               |
          |------------------------------------------------------------|
          |    Type    |  JP15  |  JP17   |  JP18   |  JP19  |  JP20   |
          |------------+--------+---------+---------+--------+---------|
          |  80486DX4  |  Open  |  Open   |  3 & 4  | 2 & 3  | Closed  |
          |------------+--------+---------+---------+--------+---------|
          |    P24D    |  Open  |  5 & 6  |  3 & 4  | 2 & 3  | Closed  |
          |------------+--------+---------+---------+--------+---------|
          |    P24T    |  Open  |  Open   |  3 & 4  | 1 & 2  | Closed  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |       Speed        |        JP6        |        JP8        |
          |--------------------+-------------------+-------------------|
          |       25MHz        |       Open        |       Open        |
          |--------------------+-------------------+-------------------|
          |       33MHz        |      Closed       |      Closed       |
          |--------------------+-------------------+-------------------|
          |       40MHz        |      Closed       |       Open        |
          |--------------------+-------------------+-------------------|
          |       50iMHz       |       Open        |       Open        |
          |--------------------+-------------------+-------------------|
          |       50MHz        |       Open        |      Closed       |
          |--------------------+-------------------+-------------------|
          |       66iMHz       |      Closed       |      Closed       |
          |--------------------+-------------------+-------------------|
          |       75iMHz       |       Open        |       Open        |
          |--------------------+-------------------+-------------------|
          |       80iMHz       |      Closed       |       Open        |
          |--------------------+-------------------+-------------------|
          |      100iMHz       |      Closed       |      Closed       |
          |--------------------+-------------------+-------------------|
          |      120iMHz       |      Closed       |      Closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CPU VOLTAGE CONFIGURATION                  |
          |------------------------------------------------------------|
          |          Voltage           |             JP21              |
          |----------------------------+-------------------------------|
          |           3.45v            |       pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |             4v             |       pins 3 & 4 closed       |
          |----------------------------+-------------------------------|
          |             5v             |       pins 5 & 6 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DMA CONFIGURATION                      |
          |------------------------------------------------------------|
          |       DMA        |        JP1         |        JP2         |
          |------------------+--------------------+--------------------|
          |      DMA 1       | pins 2 & 3 closed  | pins 2 & 3 closed  |
          |------------------+--------------------+--------------------|
          |      DMA 3       | pins 1 & 2 closed  | pins 1 & 2 closed  |
          +------------------------------------------------------------+