(TXT) View Source
       
       # COMPUTREND SYSTEMS, INC.
       
          CONTAQ SINGLE CHIP 486 (MS-4125)
       
          Processor    80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium 
                       Overdrive                                         
          Processor    25/33/40/50(internal)/50/66(internal)MHz          
          Speed        
          Chip Set     Contaq                                            
          Max. Onboard 32MB                                              
          DRAM         
          Cache        64/128/256KB                                      
          BIOS         AMI                                               
          Dimensions   260mm x 220mm                                     
          I/O Options  32-bit VESA local bus slots (2)                   
          NPU Options  None                                              
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose           | Location | Purpose         | Location  |
          |-------------------+----------+-----------------+-----------|
          | Auxiliary         |    J2    | Turbo LED       |  J5 pins  |
          | keyboard          |          |                 |  12 & 13  |
          | connector         |          |                 |           |
          |-------------------+----------+-----------------+-----------|
          | External battery  |    J4    | Turbo switch    |  J5 pins  |
          |                   |          |                 |  15 - 17  |
          |-------------------+----------+-----------------+-----------|
          | Power LED &       | J5 pins  | Reset switch    |  J5 pins  |
          | keylock           |  1 - 5   |                 |  19 & 20  |
          |-------------------+----------+-----------------+-----------|
          | Speaker           | J5 pins  | 32-bit VESA     | SL1 & SL2 |
          |                   |  7 - 10  | local bus slots |           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | Battery type select internal     |   J4   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery type select external     |   J4   |   Closed   |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select monochrome   |  JP17  |    Open    |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select color        |  JP17  |   Closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP23  | pins 1 & 2 |
          |   | alter                            |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP26  | pins 1 & 2 |
          |   | alter                            |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP37  | pins 1 & 2 |
          |   | alter                            |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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     |
          |------------------+--------------------+--------------------|
          |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       17MB       |    (4) 256K x 9    |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          |    Size    |    Bank 0     |    Bank 1     |      TAG      |
          |------------+---------------+---------------+---------------|
          |    64KB    |  (4) 8K x 8   |  (4) 8K x 8   |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   128KB    |  (4) 32K x 8  |     NONE      |  (1) 8K x 8   |
          |------------+---------------+---------------+---------------|
          |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          | Size  |       JP1       |       JP6       |      JP7       |
          |-------+-----------------+-----------------+----------------|
          | 64KB  |   pins 1 & 2    |   pins 2 & 3    |   pins 2 & 3   |
          |       |     closed      |     closed      |     closed     |
          |-------+-----------------+-----------------+----------------|
          | 128KB |   pins 2 & 3    |   pins 1 & 2    |   pins 2 & 3   |
          |       |     closed      |     closed      |     closed     |
          |-------+-----------------+-----------------+----------------|
          | 256KB |   pins 4 & 5    |   pins 1 & 2    |   pins 1 & 2   |
          |       |     closed      |     closed      |     closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |    Type    |       JP31        |    JP32    |     JP33     |
          |------------+-------------------+------------+--------------|
          |  80486SX   |       Open        |    Open    |  pins 1 & 2  |
          |   (PQFP)   |                   |            |    closed    |
          |------------+-------------------+------------+--------------|
          |  80486SX   | pins 3 & 4 closed |    Open    | pins 2 & 3,  |
          |   (PGA)    |                   |            | 4 & 5 closed |
          |------------+-------------------+------------+--------------|
          |  ODP486SX  | pins 2 & 3, 4 & 5 | pins 1 & 2 | pins 2 & 3,  |
          |            |      closed       |   closed   | 4 & 5 closed |
          |------------+-------------------+------------+--------------|
          |  80487SX   | pins 2 & 3, 4 & 5 | pins 1 & 2 | pins 2 & 3,  |
          |            |      closed       |   closed   | 4 & 5 closed |
          |------------+-------------------+------------+--------------|
          |  80486DX   | pins 1 & 2 closed | pins 4 & 5 |  pins 1 & 2  |
          |   (PQFP)   |                   |   closed   |    closed    |
          |------------+-------------------+------------+--------------|
          |  80486DX   | pins 2 & 3, 4 & 5 | pins 2 & 3 | pins 2 & 3,  |
          |   (PGA)    |      closed       |   closed   | 4 & 5 closed |
          |------------+-------------------+------------+--------------|
          |  80486DX2  | pins 2 & 3, 4 & 5 | pins 2 & 3 | pins 2 & 3,  |
          |            |      closed       |   closed   | 4 & 5 closed |
          |------------+-------------------+------------+--------------|
          |  Pentium   | pins 2 & 3, 4 & 5 | pins 1 & 2 | pins 2 & 3,  |
          | Overdrive  |      closed       |   closed   | 4 & 5 closed |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |     Speed     |     JP12     |     JP13     |     JP14     |
          |---------------+--------------+--------------+--------------|
          |     25MHz     |     Open     |     Open     |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     33MHz     |    Closed    |     Open     |     Open     |
          |---------------+--------------+--------------+--------------|
          |     40MHz     |    Closed    |    Closed    |     Open     |
          |---------------+--------------+--------------+--------------|
          |    50iMHz     |     Open     |     Open     |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     50MHz     |     Open     |    Closed    |     Open     |
          |---------------+--------------+--------------+--------------|
          |    66iMHz     |    Closed    |     Open     |     Open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               CPU CLOCK SPEED CONFIGURATION                |
          |------------------------------------------------------------|
          |           Speed            |              JP8              |
          |----------------------------+-------------------------------|
          |           20MHz            |       pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           25MHz            |       pins 2 & 3 closed       |
          |----------------------------+-------------------------------|
          |           33MHz            |       pins 1 & 2 closed       |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               VESA WAIT STATE CONFIGURATION                |
          |------------------------------------------------------------|
          |          Wait states          |            JP19            |
          |-------------------------------+----------------------------|
          |         0 wait states         |            Open            |
          |-------------------------------+----------------------------|
          |         1 wait state          |           Closed           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  BUS SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |           CPU speed           |            JP20            |
          |-------------------------------+----------------------------|
          |           <= 33MHz            |            Open            |
          |-------------------------------+----------------------------|
          |            > 33MHz            |           Closed           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  VESA CARD CONFIGURATION                   |
          |------------------------------------------------------------|
          |         Type          |     JP18      |        JP22        |
          |-----------------------+---------------+--------------------|
          | Normal card installed |    Closed     | pins 1 & 2 closed  |
          |-----------------------+---------------+--------------------|
          |   Weitek P9000 only   |     Open      | pins 2 & 3 closed  |
          +------------------------------------------------------------+