I-BUS
=====

   SHARK

   Processor    Pentium                                           
   Processor    90/100MHz                                         
   Speed        
   Chip Set     OPTI                                              
   Max. Onboard 128MB                                             
   DRAM         
   Cache        256/512KB                                         
   BIOS         Unidentified                                      
   Dimensions   300mm x 89mm                                      
   I/O Options  Floppy drive interface, IDE interface, parallel   
                port, PS/2 mouse port, serial ports (2)           
   NPU Options  None                                              

<gopher://bitreich.org/I/th99/m/I-L/33006-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           | Location | Purpose          | Location |
   |-------------------+----------+------------------+----------|
   | IDE interface LED |    J1    | Serial port 2    |    J6    |
   |-------------------+----------+------------------+----------|
   | IDE interface     |    J2    | Auxiliary        |    J9    |
   |                   |          | keyboard         |          |
   |                   |          | connector        |          |
   |-------------------+----------+------------------+----------|
   | Floppy drive      |    J3    | Speaker          |   J10    |
   | interface         |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Parallel port     |    J4    | 32-bit system    |   J13    |
   |                   |          | memory card      |          |
   |-------------------+----------+------------------+----------|
   | Serial port 1     |    J5    | PS/2 mouse port  |   J20    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Jumper |   Position   |
   |------------------------------------+--------+--------------|
   |>> | Floppy drive type select       |   J8   |  pins 1 & 2  |
   |   | 1.44MB                         |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | Floppy drive type select       |   J8   | pins 3 & 4,  |
   |   | 2.88MB                         |        | 5 & 6 closed |
   |---+--------------------------------+--------+--------------|
   |>> | IDE IRQ14 enabled              |  J11   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | IDE IRQ14 disabled             |  J11   |     Open     |
   |---+--------------------------------+--------+--------------|
   |>> | Password enabled               |  J12   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | Password disabled              |  J12   |     Open     |
   |---+--------------------------------+--------+--------------|
   |>> | Mouse IRQ12 enabled            |  J14   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |   | Mouse IRQ12 disabled           |  J14   |     Open     |
   |---+--------------------------------+--------+--------------|
   |>> | CPU normal operation           |  J16   |     Open     |
   |---+--------------------------------+--------+--------------|
   |   | CPU stop clock enabled         |  J16   |    Closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Cache invalidate select always |  J17   |  pins 2 & 3  |
   |   | invalidated                    |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | Cache invalidate select        |  J17   |  pins 1 & 2  |
   |   | invalidate on write only       |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |>> | CMOS memory normal operation   |  J19   |  pins 2 & 3  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | CMOS memory clear              |  J19   |  pins 1 & 2  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |   | On board battery disabled      |  J19   |     Open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       8MB        |    (2) 1M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 1M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       16MB       |    (2) 2M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       24MB       |    (2) 2M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 2M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       32MB       |    (2) 4M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       40MB       |    (2) 4M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       48MB       |    (2) 4M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (2) 4M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |       64MB       |    (2) 8M x 36     |        NONE        |
   |------------------+--------------------+--------------------|
   |       72MB       |    (2) 8M x 36     |    (2) 1M x 36     |
   |------------------+--------------------+--------------------|
   |       80MB       |    (2) 8M x 36     |    (2) 2M x 36     |
   |------------------+--------------------+--------------------|
   |       96MB       |    (2) 8M x 36     |    (2) 4M x 36     |
   |------------------+--------------------+--------------------|
   |      128MB       |    (2) 8M x 36     |    (2) 8M x 36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |      Size      |       Bank 0        |       Bank 1        |
   |----------------+---------------------+---------------------|
   |     256KB      |     (4) 32K x 8     |     (4) 32K x 8     |
   |----------------+---------------------+---------------------|
   |     512KB      |     (4) 64K x 8     |     (4) 64K x 8     |
   |------------------------------------------------------------|
   | Note: Board will be factory installed with either 256KB or |
   | 512KB cache                                                |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |    Size    |            J7            |        J21         |
   |------------+--------------------------+--------------------|
   |   256KB    | pins 3 & 5, 4 & 6 closed |        Open        |
   |------------+--------------------------+--------------------|
   |   512KB    | pins 1 & 3, 2 & 4 closed | pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |    Speed     |   Clock speed    |           J24            |
   |--------------+------------------+--------------------------|
   |    90MHz     |       1.5x       | pins 1 & 2, 3 & 4 closed |
   |--------------+------------------+--------------------------|
   |    100MHz    |       1.5x       |    pins 3 & 4 closed     |
   |--------------+------------------+--------------------------|
   |    100MHz    |        2x        |           Open           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |            Speed             |             J15             |
   |------------------------------+-----------------------------|
   |             1.5x             |            Open             |
   |------------------------------+-----------------------------|
   |              2x              |           Closed            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DMA CONFIGURATION                      |
   |------------------------------------------------------------|
   |            DMA             |              J23              |
   |----------------------------+-------------------------------|
   |           DMA 1            |   pins 3 & 4, 7 & 8 closed    |
   |----------------------------+-------------------------------|
   |           DMA 3            |   pins 1 & 2, 5 & 6 closed    |
   +------------------------------------------------------------+