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       # SHUTTLE COMPUTER INTERNATIONAL, INC.
       
          HOT-541 (REV. 1)
       
          Processor        Pentium                                       
          Processor Speed  75/90/100/120/133MHz                          
          Chip Set         Intel                                         
          Maximum Onboard  128MB (EDO supported)                         
          Memory           
          Cache            256/512KB                                     
          BIOS             AMI/Award                                     
          Dimensions       280mm x 220mm                                 
          I/O Options      32-bit PCI slots (4), floppy drive interface, 
                           green PC connector, IDE interfaces (2),       
                           parallel port, PS/2 mouse interface, serial   
                           ports (2), VRM connector, cache slot          
          NPU Options      None                                          
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |       Function       | Label |      Function      | Label  |
          |----------------------+-------+--------------------+--------|
          | Serial port 1        |  CN1  | Turbo switch       |  JP13  |
          |----------------------+-------+--------------------+--------|
          | Serial port 2        |  CN2  | Turbo LED          |  JP14  |
          |----------------------+-------+--------------------+--------|
          | Parallel port        |  CN3  | Green PC connector |  JP19  |
          |----------------------+-------+--------------------+--------|
          | Floppy drive         |  CN4  | IDE interface LED  |  JP20  |
          | interface            |       |                    |        |
          |----------------------+-------+--------------------+--------|
          | IDE interface 2      |  CN5  | PS/2 mouse         |  JP52  |
          |                      |       | interface          |        |
          |----------------------+-------+--------------------+--------|
          | IDE interface 1      |  CN6  | Green PC LED       |  JP74  |
          |----------------------+-------+--------------------+--------|
          | Speaker              |  JP7  | 32-bit PCI slots   | PC1 -  |
          |                      |       |                    |  PC4   |
          |----------------------+-------+--------------------+--------|
          | Power LED & keylock  |  JP8  | VRM connector      |  VRM   |
          |----------------------+-------+--------------------+--------|
          | Reset switch         | JP12  | Cache slot         |  SL1   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |              Setting               | Label |   Position    |
          |------------------------------------+-------+---------------|
          | » | Flash BIOS voltage select 5v   |  JP9  |     Open      |
          |---+--------------------------------+-------+---------------|
          |   | Flash BIOS voltage select 12v  |  JP9  |  Pins 2 & 3   |
          |   |                                |       |    closed     |
          |---+--------------------------------+-------+---------------|
          | » | CMOS memory normal operation   | JP11  |     Open      |
          |---+--------------------------------+-------+---------------|
          |   | CMOS memory clear              | JP11  |    Closed     |
          |---+--------------------------------+-------+---------------|
          | » | On board I/O enabled           | JP59  |  Pins 1 & 2   |
          |   |                                |       |    closed     |
          |---+--------------------------------+-------+---------------|
          |   | On board I/O disabled          | JP59  |  Pins 2 & 3   |
          |   |                                |       |    closed     |
          |---+--------------------------------+-------+---------------|
          | » | Monitor type select color      | JP71  |    Closed     |
          |---+--------------------------------+-------+---------------|
          |   | Monitor type select monochrome | JP71  |     Open      |
          |---+--------------------------------+-------+---------------|
          | » | Password normal operation      | JP72  |     Open      |
          |---+--------------------------------+-------+---------------|
          |   | Password clear                 | JP72  |    Closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                            DRAM                            |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       8MB        |    (2) 1M x 32     |        None        |
          |------------------+--------------------+--------------------|
          |       8MB        |        None        |    (2) 1M x 32     |
          |------------------+--------------------+--------------------|
          |       16MB       |    (2) 2M x 32     |        None        |
          |------------------+--------------------+--------------------|
          |       16MB       |        None        |    (2) 2M x 32     |
          |------------------+--------------------+--------------------|
          |       16MB       |    (2) 1M x 32     |    (2) 1M x 32     |
          |------------------+--------------------+--------------------|
          |       24MB       |    (2) 1M x 32     |    (2) 2M x 32     |
          |------------------+--------------------+--------------------|
          |       24MB       |    (2) 2M x 32     |    (2) 1M x 32     |
          |------------------+--------------------+--------------------|
          |       32MB       |    (2) 4M x 32     |        None        |
          |------------------+--------------------+--------------------|
          |       32MB       |        None        |    (2) 4M x 32     |
          |------------------+--------------------+--------------------|
          |       32MB       |    (2) 2M x 32     |    (2) 2M x 32     |
          |------------------+--------------------+--------------------|
          |       40MB       |    (2) 1M x 32     |    (2) 4M x 32     |
          |------------------+--------------------+--------------------|
          |       40MB       |    (2) 4M x 32     |    (2) 1M x 32     |
          |------------------+--------------------+--------------------|
          |       48MB       |    (2) 2M x 32     |    (2) 4M x 32     |
          |------------------+--------------------+--------------------|
          |       48MB       |    (2) 4M x 32     |    (2) 2M x 32     |
          |------------------+--------------------+--------------------|
          |       64MB       |    (2) 8M x 32     |        None        |
          |------------------+--------------------+--------------------|
          |       64MB       |        None        |    (2) 8M x 32     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DRAM (CON’T)                        |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       64MB       |    (2) 4M x 32     |    (2) 4M x 32     |
          |------------------+--------------------+--------------------|
          |       72MB       |    (2) 1M x 32     |    (2) 8M x 32     |
          |------------------+--------------------+--------------------|
          |       72MB       |    (2) 8M x 32     |    (2) 1M x 32     |
          |------------------+--------------------+--------------------|
          |       80MB       |    (2) 2M x 32     |    (2) 8M x 32     |
          |------------------+--------------------+--------------------|
          |       80MB       |    (2) 8M x 32     |    (2) 2M x 32     |
          |------------------+--------------------+--------------------|
          |       96MB       |    (2) 4M x 32     |    (2) 8M x 32     |
          |------------------+--------------------+--------------------|
          |       96MB       |    (2) 8M x 32     |    (2) 4M x 32     |
          |------------------+--------------------+--------------------|
          |      128MB       |    (2) 8M x 32     |    (2) 8M x 32     |
          |------------------------------------------------------------|
          | Note: Board accepts EDO memory.                            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CACHE SIZE                         |
          |------------------------------------------------------------|
          |   Size    |  Bank 0   |  Bank 1   |    TAG    |    SL1     |
          |-----------+-----------+-----------+-----------+------------|
          | 256KB (A) |   None    | (8) 32K x | (1) 32K x |    Not     |
          |           |           |     8     |     8     | installed  |
          |-----------+-----------+-----------+-----------+------------|
          | 256KB (B) |   None    |   None    |   None    | Installed  |
          |-----------+-----------+-----------+-----------+------------|
          | 256KB (C) | (2) 32K x |   None    | (1) 32K x |    Not     |
          |           |    32     |           |     8     | installed  |
          |-----------+-----------+-----------+-----------+------------|
          | 512KB (A) |   None    | (8) 64K x | (1) 32K x |    Not     |
          |           |           |     8     |     8     | installed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CACHE JUMPER                        |
          |------------------------------------------------------------|
          |            Size            |              JP4              |
          |----------------------------+-------------------------------|
          |         256KB (A)          |       Pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |         512KB (A)          |       Pins 1 & 2 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       CACHE VOLTAGE                        |
          |------------------------------------------------------------|
          |          Setting           |             JP32              |
          |----------------------------+-------------------------------|
          |         Mixed mode         |       Pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |            3.3v            |       Pins 2 & 3 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CPU SPEED                          |
          |------------------------------------------------------------|
          |      Setting       |       JP15        |       JP16        |
          |--------------------+-------------------+-------------------|
          |       75MHz        |       Open        |       Open        |
          |--------------------+-------------------+-------------------|
          |       90MHz        |      Closed       |      Closed       |
          |--------------------+-------------------+-------------------|
          |       100MHz       |       Open        |      Closed       |
          |--------------------+-------------------+-------------------|
          |       120MHz       |      Closed       |      Closed       |
          |--------------------+-------------------+-------------------|
          |       133MHz       |       Open        |      Closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     AT BUS CLOCK SPEED                     |
          |------------------------------------------------------------|
          |   System clock    |   AT bus clock    |        JP18        |
          |-------------------+-------------------+--------------------|
          |       50MHz       |      6.25MHz      | Pins 2 & 3 closed  |
          |-------------------+-------------------+--------------------|
          |       50MHz       |      8.33MHz      | Pins 1 & 2 closed  |
          |-------------------+-------------------+--------------------|
          |       60MHz       |      7.5MHz       | Pins 2 & 3 closed  |
          |-------------------+-------------------+--------------------|
          |       60MHz       |       10MHz       | Pins 1 & 2 closed  |
          |-------------------+-------------------+--------------------|
          |       66MHz       |      8.25MHz      | Pins 2 & 3 closed  |
          |-------------------+-------------------+--------------------|
          |       66MHz       |       11MHz       | Pins 1 & 2 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       CPU MULTIPLIER                       |
          |------------------------------------------------------------|
          |      Setting       |        JP3        |       JP58        |
          |--------------------+-------------------+-------------------|
          |        1.5x        |       Open        |       Open        |
          |--------------------+-------------------+-------------------|
          |         2x         |      Closed       |       Open        |
          |--------------------+-------------------+-------------------|
          |        2.5x        |      Closed       |      Closed       |
          |--------------------+-------------------+-------------------|
          |         3x         |       Open        |      Closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CPU VOLTAGE                         |
          |------------------------------------------------------------|
          |    Setting    |      J8      |      J9      |     J10      |
          |---------------+--------------+--------------+--------------|
          |     3.3v      |    Closed    |     Open     |     Open     |
          |---------------+--------------+--------------+--------------|
          |     3.4v      |     Open     |    Closed    |     Open     |
          |---------------+--------------+--------------+--------------|
          |     3.6v      |     Open     |     Open     |    Closed    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                       VRM CONNECTOR                        |
          |------------------------------------------------------------|
          |        Setting         |  JP50  |  JP51  |  JP56  |  JP57  |
          |------------------------+--------+--------+--------+--------|
          |   On board regulator   | 1 & 3, |  Open  | Closed | Closed |
          |       installed        | 2 & 4  |        |        |        |
          |------------------------+--------+--------+--------+--------|
          |  Add on VRM installed  |  Open  | 1 & 3, |  Open  |  Open  |
          |         at VRM         |        | 2 & 4  |        |        |
          |------------------------+--------+--------+--------+--------|
          | On board regulator and |  Open  |  Open  | Closed | Closed |
          |  add on VRM installed  |        |        |        |        |
          |         at VRM         |        |        |        |        |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        DMA CHANNEL                         |
          |------------------------------------------------------------|
          |     Setting      |        JP60        |        JP61        |
          |------------------+--------------------+--------------------|
          |       DMA1       | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
          |------------------+--------------------+--------------------|
          |       DMA3       | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         PS/2 MOUSE                         |
          |------------------------------------------------------------|
          |    Setting    |                    JP52                    |
          |---------------+--------------------------------------------|
          | 12-pin header |    Pins 2, 3, 4, 5, 6, 8, 9, 10, 11, 12    |
          |               |                   closed                   |
          |---------------+--------------------------------------------|
          |  6-pin mini   |             Pins 1 - 6 closed              |
          +------------------------------------------------------------+