(TXT) View Source
       
       # ORCHID TECHNOLOGY
       
          SUPERBOARD 486/VLB (VERSION 2)
       
          Processor            80486SX/80487SX/80486DX/ODP486SX/80486DX2 
          Processor Speed      20/25/33/50(internal)/50/66(internal)MHz  
          Chip Set             OPTI                                      
          Max. onboard DRAM    32MB                                      
          Cache                128/256KB                                 
          BIOS                 AMI                                       
          Dimensions           330mm x 218mm                             
          I/O Options          32-bit VESA card slots (2)                
          NPU Options          None                                      
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose          | Location |
          |-------------------+----------+------------------+----------|
          | Power LED &       |   JP8    | 32-bit VESA      | S1 & S2  |
          | keylock           |          | cards            |          |
          |-------------------+----------+------------------+----------|
          | Speaker           |   JP7    | Reset switch     |   JP9    |
          |-------------------+----------+------------------+----------|
          | Turbo LED         |   JP3    | Turbo switch     |   JP10   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper  | Position  |
          |--------------------------------------+---------+-----------|
          | » | Monitor type select color        |  JP26   |  Closed   |
          |---+----------------------------------+---------+-----------|
          |   | Monitor type select monochrome   |  JP26   |   Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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        |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |      TAG      |
          |------------+---------------+---------------+---------------|
          |   128KB    |  (4) 32K x 8  |     NONE      |  (1) 32K x 8  |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |  Size   |       JP14        |   JP16   |       JP22        |
          |---------+-------------------+----------+-------------------|
          |  128KB  | pins 2 & 3 closed |   Open   | pins 2 & 3 closed |
          |---------+-------------------+----------+-------------------|
          |  256KB  | pins 1 & 2 closed |  Closed  | pins 1 & 2 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |  CPU Type  | Oscillator |  JP12  |  JP13  |  JP18  | JP19  |
          |------------+------------+--------+--------+--------+-------|
          | 80486SX -  |   20MHz    | pins 2 |  Open  |  Open  | pins  |
          |   20MHz    |            |  & 3   |        |        | 2 & 3 |
          |------------+------------+--------+--------+--------+-------|
          | 80486SX -  |   40MHz    | pins 2 |  Open  |  Open  | pins  |
          |   20MHz    |            |  & 3   |        |        | 1 & 2 |
          |------------+------------+--------+--------+--------+-------|
          | 80486SX -  |   25MHz    | pins 2 |  Open  |  Open  | pins  |
          |   25MHz    |            |  & 2   |        |        | 2 & 3 |
          |------------+------------+--------+--------+--------+-------|
          | 80486SX -  |   50MHz    | pins 2 |  Open  |  Open  | pins  |
          |   25MHz    |            |  & 3   |        |        | 1 & 2 |
          |------------+------------+--------+--------+--------+-------|
          | 80486DX -  |   25MHz    | pins 1 | Closed | pins 2 | pins  |
          |   25MHz    |            |  & 2   |        |  & 3   | 2 & 3 |
          |------------+------------+--------+--------+--------+-------|
          | 80486DX -  |   66MHz    | pins 1 | Closed | pins 2 | pins  |
          |   33MHz    |            |  & 2   |        |  & 3   | 1 & 2 |
          |------------+------------+--------+--------+--------+-------|
          | 80486DX -  |   50MHz    | pins 1 | Closed | pins 2 | pins  |
          |   50MHz    |            |  & 2   |        |  & 3   | 2 & 3 |
          |------------+------------+--------+--------+--------+-------|
          | ODP486SX - |   25MHz    | pins 2 |  Open  |  Open  | pins  |
          |   25MHz    |            |  & 3   |        |        | 2 & 3 |
          |------------+------------+--------+--------+--------+-------|
          | ODP486SX - |   50MHz    | pins 2 |  Open  | pins 2 | Open  |
          |   25MHz    |            |  & 3   |        |  & 3   |       |
          |------------+------------+--------+--------+--------+-------|
          | 80486DX2 - |   25MHz    | pins 1 | Closed | pins 2 | pins  |
          |   50MHz    |            |  & 2   |        |  & 3   | 2 & 3 |
          |------------+------------+--------+--------+--------+-------|
          | 80486DX2 - |   50MHz    | pins 1 | Closed | pins 2 | pins  |
          |   50MHz    |            |  & 2   |        |  & 3   | 1 & 2 |
          |------------+------------+--------+--------+--------+-------|
          | 80486DX2 - |   66MHz    | pins 1 | Closed | pins 2 | pins  |
          |   66MHz    |            |  & 2   |        |  & 3   | 1 & 2 |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |        VESA CPU TYPE (ID0 & ID1) CONFIGURATION         |
          |------------------------------------------------------------|
          |     CPU Type     |     JP1 (ID0)      |     JP2 (ID1)      |
          |------------------+--------------------+--------------------|
          |      80386       | pins 2 & 3 closed  | pins 1 & 2 closed  |
          |------------------+--------------------+--------------------|
          |      80486       | pins 1 & 2 closed  | pins 2 & 3 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |            VESA WAIT STATE (ID2) CONFIGURATION             |
          |------------------------------------------------------------|
          |    Wait states     |    CPU speed     |     JP4 (ID2)      |
          |--------------------+------------------+--------------------|
          |   0 wait states    |     £ 33MHz      | pins 1 & 2 closed  |
          |--------------------+------------------+--------------------|
          |    1 wait state    |     > 33MHz      | pins 2 & 3 closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |             VESA BUS SPEED (ID3) CONFIGURATION             |
          |------------------------------------------------------------|
          |         CPU speed          |           JP5 (ID3)           |
          |----------------------------+-------------------------------|
          |          £ 33MHz           |       pins 1 & 2 closed       |
          |----------------------------+-------------------------------|
          |          > 33MHz           |       pins 2 & 3 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   VESA ID4 CONFIGURATION                   |
          |------------------------------------------------------------|
          |            Setting            |         JP6 (ID4)          |
          |-------------------------------+----------------------------|
          |    Reserved for future use    |     pins 2 & 3 closed      |
          +------------------------------------------------------------+