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       # EPOX COMPUTER CO., LTD.
       
          5BTXB-E
       
          Device Type Mainboard                                             
          Processor   CX 6X86L/IBM 6X86L/CX 686MX/IBM 6X86MX/AM K5/         
                                                                            
                      AM K6/Pentium/Pentium MMX                             
          Processor   90/100/120/133/150/166/188/200/225/233/266/300/333MHz 
          Speed       
          Chip Set    Intel                                                 
          Video Chip  None                                                  
          Set         
          Maximum     256MB (EDO & SDRAM supported)                         
          Onboard     
          Memory      
          Maximum     None                                                  
          Video       
          Memory      
          Cache       512KB                                                 
          BIOS        Award                                                 
          Dimensions  220mm x 220mm                                         
          I/O Options 32-bit PCI slots (4), floppy drive interface, IDE     
          (backplane) interfaces (2), parallel port, PS/2 mouse interface,  
                      serial ports (2), IR connector, USB connector, ATX    
                      power connector                                       
          NPU Options None                                                  
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | ATX power         |   ATX    | IR connector     |    J2    |
          | connector         |          |                  |          |
          |-------------------+----------+------------------+----------|
          | USB connector     |   CN1    | CPU fan power    |    J3    |
          |-------------------+----------+------------------+----------|
          | Serial port 1     |   CN2    | Power LED &      |   J4A    |
          |                   |          | keylock          |          |
          |-------------------+----------+------------------+----------|
          | Serial port 2     |   CN3    | Speaker          |   J4B    |
          |-------------------+----------+------------------+----------|
          | Parallel port     |   CN4    | Reset switch     |   J4C    |
          |-------------------+----------+------------------+----------|
          | Floppy drive      |   CN5    | Turbo LED        |   J4D    |
          | interface         |          |                  |          |
          |-------------------+----------+------------------+----------|
          | IDE interface 2   |   CN6    | IDE interface    |   J4E    |
          |                   |          | LED              |          |
          |-------------------+----------+------------------+----------|
          | IDE interface 1   |   CN7    | Soft off power   |    J5    |
          |                   |          | supply           |          |
          |-------------------+----------+------------------+----------|
          | PS/2 mouse        |    J1    | 32-bit PCI slots |  PC1 –   |
          | interface         |          |                  |   PC4    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |             Function             | Label |    Position     |
          |----------------------------------+-------+-----------------|
          | » | CMOS memory normal operation |  JP1  |   Pins 1 & 2    |
          |   |                              |       |     closed      |
          |---+------------------------------+-------+-----------------|
          |   | CMOS memory clear            |  JP1  |   Pins 2 & 3    |
          |   |                              |       |     closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SIMM CONFIGURATION                     |
          |------------------------------------------------------------|
          |            Size            |            Bank 2             |
          |----------------------------+-------------------------------|
          |            8MB             |          (2) 1M x 36          |
          |----------------------------+-------------------------------|
          |            16MB            |          (2) 2M x 36          |
          |----------------------------+-------------------------------|
          |            32MB            |          (2) 4M x 36          |
          |----------------------------+-------------------------------|
          |            64MB            |          (2) 8M x 36          |
          |----------------------------+-------------------------------|
          |           128MB            |         (2) 16M x 36          |
          |------------------------------------------------------------|
          |      Note: Board accepts EDO memory.                       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DIMM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       8MB        |    (1) 1M x 64     |        None        |
          |------------------+--------------------+--------------------|
          |       16MB       |    (1) 2M x 64     |        None        |
          |------------------+--------------------+--------------------|
          |       16MB       |    (1) 1M x 64     |    (1) 1M x 64     |
          |------------------+--------------------+--------------------|
          |       24MB       |    (1) 2M x 64     |    (1) 1M x 64     |
          |------------------+--------------------+--------------------|
          |       32MB       |    (1) 4M x 64     |        None        |
          |------------------+--------------------+--------------------|
          |       32MB       |    (1) 2M x 64     |    (1) 2M x 64     |
          |------------------+--------------------+--------------------|
          |       40MB       |    (1) 4M x 64     |    (1) 1M x 64     |
          |------------------+--------------------+--------------------|
          |       48MB       |    (1) 4M x 64     |    (1) 2M x 64     |
          |------------------+--------------------+--------------------|
          |       64MB       |    (1) 8M x 64     |        None        |
          |------------------+--------------------+--------------------|
          |       64MB       |    (1) 4M x 64     |    (1) 4M x 64     |
          |------------------+--------------------+--------------------|
          |       72MB       |    (1) 8M x 64     |    (1) 1M x 64     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 DIMM CONFIGURATION (CON’T)                 |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       80MB       |    (1) 8M x 64     |    (1) 2M x 64     |
          |------------------+--------------------+--------------------|
          |       96MB       |    (1) 8M x 64     |    (1) 4M x 64     |
          |------------------+--------------------+--------------------|
          |      128MB       |    (1) 16M x 64    |        None        |
          |------------------+--------------------+--------------------|
          |      128MB       |    (1) 8M x 64     |    (1) 8M x 64     |
          |------------------+--------------------+--------------------|
          |      136MB       |    (1) 16M x 64    |    (1) 1M x 64     |
          |------------------+--------------------+--------------------|
          |      144MB       |    (1) 16M x 64    |    (1) 2M x 64     |
          |------------------+--------------------+--------------------|
          |      160MB       |    (1) 16M x 64    |    (1) 4M x 64     |
          |------------------+--------------------+--------------------|
          |      192MB       |    (1) 16M x 64    |    (1) 8M x 64     |
          |------------------+--------------------+--------------------|
          |      256MB       |    (1) 16M x 64    |    (1) 16M x 64    |
          |------------------------------------------------------------|
          |      Note: Board accepts SDRAM memory.                     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |            Size            |            Bank 0             |
          |----------------------------+-------------------------------|
          |           512KB            |         (1) 64K x 64          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU SPEED SELECTION (CX 6X86L)               |
          |------------------------------------------------------------|
          | CPU speed  | Clock speed | Multiplier |        JP3         |
          |------------+-------------+------------+--------------------|
          |   150MHz   |    60MHz    |    2.5x    | Pins 5 & 6 closed  |
          |------------+-------------+------------+--------------------|
          |   166MHz   |    66MHz    |    2.5x    | Pins 7 & 8 closed  |
          |------------+-------------+------------+--------------------|
          |   200MHz   |    75MHz    |     3x     | Pins 9 & 10 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              CPU SPEED SELECTION (IBM 6X86L)               |
          |------------------------------------------------------------|
          | CPU speed  | Clock speed | Multiplier |        JP3         |
          |------------+-------------+------------+--------------------|
          |   150MHz   |    60MHz    |    2.5x    | Pins 5 & 6 closed  |
          |------------+-------------+------------+--------------------|
          |   166MHz   |    66MHz    |    2.5x    | Pins 7 & 8 closed  |
          |------------+-------------+------------+--------------------|
          |   200MHz   |    75MHz    |     3x     | Pins 9 & 10 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              CPU SPEED SELECTION (CX 6X86MX)               |
          |------------------------------------------------------------|
          | CPU speed | Clock speed | Multiplier |         JP3         |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    66MHz    |     2x     |  Pins 7 & 8 closed  |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    60MHz    |    2.5x    | Pins 11 & 12 closed |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    75MHz    |     2x     | Pins 9 & 10 closed  |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    66MHz    |    2.5x    | Pins 13 & 14 closed |
          |-----------+-------------+------------+---------------------|
          |  233MHz   |    75MHz    |    2.5x    | Pins 15 & 16 closed |
          |-----------+-------------+------------+---------------------|
          |  233MHz   |    66MHz    |     3x     | Pins 17 & 18 closed |
          |-----------+-------------+------------+---------------------|
          |  266MHz   |    75MHz    |     3x     | Pins 19 & 20 closed |
          |-----------+-------------+------------+---------------------|
          |  266MHz   |    66MHz    |    3.5x    | Pins 21 & 22 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              CPU SPEED SELECTION (IBM 6X86MX)              |
          |------------------------------------------------------------|
          | CPU speed | Clock speed | Multiplier |         JP3         |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    66MHz    |     2x     |  Pins 7 & 8 closed  |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    60MHz    |    2.5x    | Pins 11 & 12 closed |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    75MHz    |     2x     | Pins 9 & 10 closed  |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    66MHz    |    2.5x    | Pins 13 & 14 closed |
          |-----------+-------------+------------+---------------------|
          |  233MHz   |    75MHz    |    2.5x    | Pins 15 & 16 closed |
          |-----------+-------------+------------+---------------------|
          |  233MHz   |    66MHz    |     3x     | Pins 17 & 18 closed |
          |-----------+-------------+------------+---------------------|
          |  266MHz   |    75MHz    |     3x     | Pins 19 & 20 closed |
          |-----------+-------------+------------+---------------------|
          |  266MHz   |    66MHz    |    3.5x    | Pins 21 & 22 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CPU SPEED SELECTION (AM K5)                 |
          |------------------------------------------------------------|
          | CPU speed | Clock speed | Multiplier |         JP3         |
          |-----------+-------------+------------+---------------------|
          |   90MHz   |    60MHz    |    1.5x    |  Pins 1 & 2 closed  |
          |-----------+-------------+------------+---------------------|
          |  100MHz   |    66MHz    |    1.5x    |  Pins 3 & 4 closed  |
          |-----------+-------------+------------+---------------------|
          |  120MHz   |    60MHz    |     2x     |  Pins 5 & 6 closed  |
          |-----------+-------------+------------+---------------------|
          |  133MHz   |    66MHz    |     2x     |  Pins 7 & 8 closed  |
          |-----------+-------------+------------+---------------------|
          |  150MHz   |    60MHz    |    2.5x    | Pins 11 & 12 closed |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    66MHz    |    2.5x    | Pins 13 & 14 closed |
          |-----------+-------------+------------+---------------------|
          |  188MHz   |    75MHz    |    2.5x    | Pins 15 & 16 closed |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    66MHz    |     3x     | Pins 17 & 18 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CPU SPEED SELECTION (AM K6)                 |
          |------------------------------------------------------------|
          | CPU speed | Clock speed | Multiplier |         JP3         |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    66MHz    |    2.5x    | Pins 13 & 14 closed |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    66MHz    |     3x     | Pins 17 & 18 closed |
          |-----------+-------------+------------+---------------------|
          |  233MHz   |    66MHz    |    3.5x    | Pins 21 & 22 closed |
          |-----------+-------------+------------+---------------------|
          |  266MHz   |    66MHz    |     4x     | Pins 23 & 24 closed |
          |-----------+-------------+------------+---------------------|
          |  300MHz   |    66MHz    |    4.5x    | Pins 25 & 26 closed |
          |-----------+-------------+------------+---------------------|
          |  333MHz   |    66MHz    |     5x     | Pins 27 & 28 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                CPU SPEED SELECTION (INTEL)                 |
          |------------------------------------------------------------|
          | CPU speed | Clock speed | Multiplier |         JP3         |
          |-----------+-------------+------------+---------------------|
          |   90MHz   |    60MHz    |    1.5x    |  Pins 1 & 2 closed  |
          |-----------+-------------+------------+---------------------|
          |  100MHz   |    66MHz    |    1.5x    |  Pins 3 & 4 closed  |
          |-----------+-------------+------------+---------------------|
          |  120MHz   |    60MHz    |     2x     |  Pins 5 & 6 closed  |
          |-----------+-------------+------------+---------------------|
          |  133MHz   |    66MHz    |     2x     |  Pins 7 & 8 closed  |
          |-----------+-------------+------------+---------------------|
          |  150MHz   |    60MHz    |    2.5x    | Pins 11 & 12 closed |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    66MHz    |    2.5x    | Pins 13 & 14 closed |
          |-----------+-------------+------------+---------------------|
          |  188MHz   |    75MHz    |    2.5x    | Pins 15 & 16 closed |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    66MHz    |     3x     | Pins 17 & 18 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              CPU SPEED SELECTION (INTEL MMX)               |
          |------------------------------------------------------------|
          | CPU speed | Clock speed | Multiplier |         JP3         |
          |-----------+-------------+------------+---------------------|
          |  166MHz   |    66MHz    |    2.5x    | Pins 13 & 14 closed |
          |-----------+-------------+------------+---------------------|
          |  200MHz   |    66MHz    |     3x     | Pins 17 & 18 closed |
          |-----------+-------------+------------+---------------------|
          |  233MHz   |    66MHz    |    3.5x    | Pins 21 & 22 closed |
          |-----------+-------------+------------+---------------------|
          |  266MHz   |    66MHz    |     4x     | Pins 23 & 24 closed |
          |-----------+-------------+------------+---------------------|
          |  300MHz   |    66MHz    |    4.5x    | Pins 25 & 26 closed |
          |-----------+-------------+------------+---------------------|
          |  333MHz   |    66MHz    |     5x     | Pins 27 & 28 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU VOLTAGE SELECTION                    |
          |------------------------------------------------------------|
          |          Voltage           |              JP2              |
          |----------------------------+-------------------------------|
          |   |          2.1v          |       Pins 1 & 6 closed       |
          |---+------------------------+-------------------------------|
          |   |          2.2v          |       Pins 2 & 7 closed       |
          |---+------------------------+-------------------------------|
          | » |          2.8v          |       Pins 3 & 8 closed       |
          |---+------------------------+-------------------------------|
          |   |          2.9v          |       Pins 4 & 9 closed       |
          |---+------------------------+-------------------------------|
          |   |          3.2v          |      Pins 5 & 10 closed       |
          +------------------------------------------------------------+