(TXT) View Source
       
       # JETPRO INFOTECH COMPANY, LTD.
       
          MB-6U(MB-450CBU)
       
          Processor          80386DX/80486SX/80487SX/80486DX/80486DX2    
          Processor Speed    20/25/33/40/50(internal)/50/66(internal)MHz 
          Chip Set           UMC                                         
          Max. Onboard DRAM  64MB                                        
          SRAM Cache         64/256KB                                    
          BIOS               AMI                                         
          Dimensions         330mm x 218mm                               
          I/O Options        32-bit proprietary local bus card           
          NPU Options        80387/3167                                  
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose      | Location | Purpose               | Location |
          |--------------+----------+-----------------------+----------|
          | Reset switch |    J5    | Power LED & keylock   |    J9    |
          |--------------+----------+-----------------------+----------|
          | Turbo LED    |    J6    | External battery      |   J11    |
          |--------------+----------+-----------------------+----------|
          | Turbo switch |    J7    | 32-bit proprietary    |    S1    |
          |              |          | local bus card        |          |
          |--------------+----------+-----------------------+----------|
          | Speaker      |    J8    |                       |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |                Function                | Jumper | Position |
          |----------------------------------------+--------+----------|
          | » | CMOS memory normal operation       |   W1   |  closed  |
          |---+------------------------------------+--------+----------|
          |   | CMOS memory clear                  |   W1   |   open   |
          |---+------------------------------------+--------+----------|
          | » | Monitor type select color          |   W2   |  closed  |
          |---+------------------------------------+--------+----------|
          |   | Monitor type select monochrome     |   W2   |   open   |
          |---+------------------------------------+--------+----------|
          | » | Factory configured-do not alter    |   W3   |   open   |
          |---+------------------------------------+--------+----------|
          | » | Tag mode select write back enabled |  W15   |   open   |
          |   | (tag installed at U45)             |        |          |
          |---+------------------------------------+--------+----------|
          |   | Tag mode select write back         |  W15   |   open   |
          |   | disabled (tag not installed at     |        |          |
          |   | U45)                               |        |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       1MB        |    (4) 256K x 9    |        NONE        |
          |------------------+--------------------+--------------------|
          |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       4MB        |     (4) 1M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          |    Size    | OSC2  |   W5   |  W10  |  W11  |  W19   | W22 |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80386DX/25 | 50MHz |  open  |  N/A  |  N/A  |  open  | N/A |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80386DX/33 | 66MHz |  open  |  N/A  |  N/A  |  open  | N/A |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80386DX/40 | 80MHz |  open  |  N/A  |  N/A  |  open  | N/A |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80486SX/20 | 20MHz |  open  | open  | pins  | closed | 1 & |
          |            |       |        |       | 1 & 2 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80486SX/20 | 40MHz |  open  | open  | pins  | closed | 1 & |
          |            |       |        |       | 2 & 3 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80487SX/20 | 20MHz | closed | pins  | pins  | closed | 1 & |
          |            |       |        | 2 & 3 | 1 & 2 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80487SX/20 | 40MHz | closed | pins  | pins  | closed | 1 & |
          |            |       |        | 2 & 3 | 2 & 3 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80486DX/25 | 25MHz |  open  | pins  | pins  | closed | 1 & |
          |            |       |        | 1 & 2 | 1 & 2 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80486DX/25 | 50MHz |  open  | pins  | pins  | closed | 1 & |
          |            |       |        | 1 & 2 | 2 & 3 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80486DX/33 | 33MHz |  open  | pins  | pins  | closed | 1 & |
          |            |       |        | 1 & 2 | 1 & 2 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80486DX/33 | 66MHz |  open  | pins  | pins  | closed | 1 & |
          |            |       |        | 1 & 2 | 2 & 3 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------+-------+--------+-------+-------+--------+-----|
          | 80486DX/50 | 50MHz |  open  | pins  | pins  | closed | 1 & |
          |            |       |        | 1 & 2 | 1 & 2 |        |  2  |
          |            |       |        |       |       |        | and |
          |            |       |        |       |       |        | 3 & |
          |            |       |        |       |       |        |  4  |
          |------------------------------------------------------------|
          | Note:Pins designated should be in the closed position      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  NPU JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          |        Size        |        W8         |        W20        |
          |--------------------+-------------------+-------------------|
          |       80387        |      closed       |      closed       |
          |--------------------+-------------------+-------------------|
          |        3167        |       open        |       open        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 SRAM JUMPER CONFIGURATION                  |
          |------------------------------------------------------------|
          | Jumper |    32KB    |    64KB    |   128KB    |   256KB    |
          |--------+------------+------------+------------+------------|
          |  W12   | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
          |        |   closed   |   closed   |   closed   |   closed   |
          |--------+------------+------------+------------+------------|
          |  W13   | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 |
          |        |   closed   |   closed   |   closed   |   closed   |
          |--------+------------+------------+------------+------------|
          |  W14   | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 |
          |        |   closed   |   closed   |   closed   |   closed   |
          |--------+------------+------------+------------+------------|
          |  W15   |    open    |    open    |    open    |    open    |
          |--------+------------+------------+------------+------------|
          |  W17   | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
          |        |   closed   |   closed   |   closed   |   closed   |
          |--------+------------+------------+------------+------------|
          |  W18   |    N/A     |    N/A     | pins 1 & 2 | pins 2 & 3 |
          |        |            |            |   closed   |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     SRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |     Cache     |   Locations   |      TAG      |
          |------------+---------------+---------------+---------------|
          |    32KB    |  (4) 8K x 8   |    Bank 0     |  (4) 16K x 4  |
          |------------+---------------+---------------+---------------|
          |    64KB    |  (8) 8K x 8   |  Banks 0 & 1  |  (4) 16K x 4  |
          |------------+---------------+---------------+---------------|
          |   128KB    |  (4) 32K x 8  |    Bank 0     |  (4) 16K x 4  |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (8) 32K x 8  |  Banks 0 & 1  |  (4) 16K x 4  |
          +------------------------------------------------------------+