VEXTREC TECNHOLOGY, INC.
========================

   GMB-P54SPS (VER. 2.00)

   Processor        CX M1/Pentium                                 
   Processor Speed  75/90/100/120/133MHz                          
   Chip Set         SIS 85C50X or 85C550X                         
   Video Chip Set   None                                          
   Maximum Onboard  128MB (EDO supported)                         
   Memory           
   Maximum Video    None                                          
   Memory           
   Cache            256/512/1024KB                                
   BIOS             Award                                         
   Dimensions       270mm x 220mm                                 
   I/O Options      32-bit PCI slots (4), floppy drive interface, 
                    game interface, green PC connector, IDE       
                    interfaces (2), parallel port, serial ports   
                    (2)                                           
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/U-Z/35298-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | Chassis fan power |    J1    | IDE interface 1  |    J9    |
   |-------------------+----------+------------------+----------|
   | IDE interface LED |    J2    | Serial port 1    |   J12    |
   |-------------------+----------+------------------+----------|
   | Power LED &       |    J3    | Serial port 2    |   J13    |
   | keylock           |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Speaker           |    J4    | Game interface   |   J14    |
   |-------------------+----------+------------------+----------|
   | Turbo switch      |    J5    | Parallel port    |   J15    |
   |-------------------+----------+------------------+----------|
   | Turbo LED         |    J6    | Floppy drive     |   J16    |
   |                   |          | interface        |          |
   |-------------------+----------+------------------+----------|
   | Reset switch      |    J7    | Green PC         |   JP11   |
   |                   |          | connector        |          |
   |-------------------+----------+------------------+----------|
   | IDE interface 2   |    J8    | 32-bit PCI slots |  PC1 -   |
   |                   |          |                  |   PC4    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | CMOS memory normal operation      |  JP1  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | CMOS memory clear                 |  JP1  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Cache write cycle invalid during  |  JP4  | Pins 2 & 3 |
   |   | write cycle                       |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Cache write cycle always invalid  |  JP4  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | CPU pipeline mode disabled        |  JP5  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | CPU pipeline mode enabled         |  JP5  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | CPU internal cache write select   |  JP6  | Pins 1 & 2 |
   |   | write back                        |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | CPU internal cache write select   |  JP6  | Pins 2 & 3 |
   |   | write through                     |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Monitor type select color         | JP12  |   Closed   |
   |---+-----------------------------------+-------+------------|
   |   | Monitor type select monochrome    | JP12  |    Open    |
   |---+-----------------------------------+-------+------------|
   |>> | Parallel port IRQ select IRQ7     | JP18  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Parallel port IRQ select IRQ5     | JP18  | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       2MB        |   (2) 256K x 36    |        None        |
   |------------------+--------------------+--------------------|
   |       4MB        |   (2) 512K x 36    |        None        |
   |------------------+--------------------+--------------------|
   |       4MB        |   (2) 256K x 36    |   (2) 256K x 36    |
   |------------------+--------------------+--------------------|
   |       6MB        |   (2) 512K x 36    |   (2) 256K x 36    |
   |------------------+--------------------+--------------------|
   |       8MB        |    (2) 1M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       8MB        |   (2) 512K x 36    |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       10MB       |    (2) 1M x 36     |   (2) 256K x 36    |
   |------------------+--------------------+--------------------|
   |       12MB       |    (2) 1M x 36     |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 2M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 1M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       18MB       |    (2) 2M x 36     |   (2) 256K x 36    |
   |------------------+--------------------+--------------------|
   |       20MB       |    (2) 2M x 36     |   (2) 512K x 36    |
   |------------------+--------------------+--------------------|
   |       24MB       |    (2) 2M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 4M x 36     |        None        |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 2M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       34MB       |    (2) 4M x 36     |   (2) 256K x 36    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM CONFIGURATION (CON'T)                 |
   |------------------------------------------------------------|
   |     Size     |        Bank 0        |        Bank 1        |
   |--------------+----------------------+----------------------|
   |     36MB     |     (2) 4M x 36      |    (2) 512K x 36     |
   |--------------+----------------------+----------------------|
   |     40MB     |     (2) 1M x 36      |     (2) 4M x 36      |
   |--------------+----------------------+----------------------|
   |     48MB     |     (2) 4M x 36      |     (2) 2M x 36      |
   |--------------+----------------------+----------------------|
   |     64MB     |     (2) 8M x 36      |         None         |
   |--------------+----------------------+----------------------|
   |     64MB     |     (2) 4M x 36      |     (2) 4M x 36      |
   |--------------+----------------------+----------------------|
   |     66MB     |     (2) 8M x 36      |    (2) 256K x 36     |
   |--------------+----------------------+----------------------|
   |     68MB     |    (2) 512K x 36     |     (2) 8M x 36      |
   |--------------+----------------------+----------------------|
   |     72MB     |     (2) 8M x 36      |     (2) 1M x 36      |
   |--------------+----------------------+----------------------|
   |     80MB     |     (2) 2M x 36      |     (2) 8M x 36      |
   |--------------+----------------------+----------------------|
   |     96MB     |     (2) 8M x 36      |     (2) 4M x 36      |
   |--------------+----------------------+----------------------|
   |    128MB     |     (2) 16M x 36     |         None         |
   |--------------+----------------------+----------------------|
   |    128MB     |     (2) 8M x 36      |     (2) 8M x 36      |
   |------------------------------------------------------------|
   | Note: Board accepts EDO memory. Banks are interchangeable. |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |        TAG         |
   |------------------+--------------------+--------------------|
   |      256KB       |    (8) 32K x 8     |   (1) 8K/16K x 8   |
   |------------------+--------------------+--------------------|
   |      512KB       |    (8) 64K x 8     |  (1) 16K/32K x 8   |
   |------------------+--------------------+--------------------|
   |       1MB        |    (8) 128K x 8    |    (1) 32K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size   |        JP7        |        JP8        |   JP9    |
   |---------+-------------------+-------------------+----------|
   |  256KB  | Pins 1 & 2 closed | Pins 1 & 2 closed |  Closed  |
   |---------+-------------------+-------------------+----------|
   |  512KB  | Pins 2 & 3 closed | Pins 1 & 2 closed |   Open   |
   |---------+-------------------+-------------------+----------|
   |   1MB   | Pins 2 & 3 closed | Pins 2 & 3 closed |  Closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   |CPU speed|Clock speed|Multiplier| JP0  |  S0  |  S1  |  S2  |
   |---------+-----------+----------+------+------+------+------|
   |  75MHz  |   50MHz   |   1.5x   |1 & 2 | Open | Open |Closed|
   |---------+-----------+----------+------+------+------+------|
   |  90MHz  |   60MHz   |   1.5x   |1 & 2 | Open |Closed| Open |
   |---------+-----------+----------+------+------+------+------|
   | 100MHz  |   66MHz   |   1.5x   |1 & 2 |Closed| Open |Closed|
   |---------+-----------+----------+------+------+------+------|
   | 120MHz  |   60MHz   |    2x    |2 & 3 | Open |Closed| Open |
   |---------+-----------+----------+------+------+------+------|
   | 133MHz  |   66MHz   |    2x    |2 & 3 |Closed| Open |Closed|
   |------------------------------------------------------------|
   |Note: Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CPU TYPE SELECTION                     |
   |------------------------------------------------------------|
   |             Type              |            JP01            |
   |-------------------------------+----------------------------|
   |             CX M1             |           Closed           |
   |-------------------------------+----------------------------|
   |         P54C/CS/C-VR          |           Closed           |
   |-------------------------------+----------------------------|
   |          P54CT/C-VRE          |            Open            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DMA CHANNEL SELECTION                    |
   |------------------------------------------------------------|
   |     Channel      |        JP22        |        JP23        |
   |------------------+--------------------+--------------------|
   |>> |   Printer    |        Open        |        Open        |
   |---+--------------+--------------------+--------------------|
   |   |      1       | Pins 1 & 3 closed  | Pins 1 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |      3       | Pins 2 & 4 closed  | Pins 2 & 4 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       BIOS SELECTION                       |
   |------------------------------------------------------------|
   |       Type       |        JP2         |        JP3         |
   |------------------+--------------------+--------------------|
   |>> |    EPROM     | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |  12v flash   | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |   5v flash   | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+