(TXT) View Source
       
       # CHEERFUL INTERNATIONAL CORPORATION
       
          S680
       
                                                                         
          Processor             80386SX                                  
          Processor Speed       16MHz                                    
          Chip Set              Intel                                    
          Max. Onboard DRAM     2MB                                      
          Cache                 None                                     
          BIOS                  AMI                                      
          Dimensions            330.2mm x 218.4mm                        
          I/O Options           None                                     
          NPU Options           80387SX                                  
                                                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose        | Location | Purpose             | Location |
          |----------------+----------+---------------------+----------|
          | Reset switch   |   CN1    | Speaker             |   CN4    |
          |----------------+----------+---------------------+----------|
          | Turbo switch   |   CN2    | Power LED & keylock |   CN7    |
          |----------------+----------+---------------------+----------|
          | Turbo LED      |   CN3    | External battery    |   CN8    |
          |------------------------------------------------------------|
          | Note:CN2 can be connected to a turbo switch, however the   |
          | manufacturer recommends that the computer be turned off    |
          | before changing the CPU speed.                             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | CPU speed select fast            |  CN2   |   closed   |
          |---+----------------------------------+--------+------------|
          |   | CPU speed select slow            |  CN2   |    open    |
          |---+----------------------------------+--------+------------|
          | » | Battery select internal          |  CN9   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Battery select external          |  CN9   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Monitor type select monochrome   |  JP2   |    open    |
          |---+----------------------------------+--------+------------|
          |   | Monitor type select color        |  JP2   |   closed   |
          |---+----------------------------------+--------+------------|
          | » | BIOS type select 2764            |  JP4   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | BIOS type select 27128           |  JP4   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP10  |  unknown   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP11  |  unknown   |
          |   | alter                            |        |            |
          |---+----------------------------------+--------+------------|
          | » | Factory configured - do not      |  JP12  |  unknown   |
          |   | alter                            |        |            |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  | Bank 0  | Bank 1  | Bank 2  | Bank 3  |  E1 - E8   |
          |-------+---------+---------+---------+---------+------------|
          | 512KB |  (18)   |  NONE   |  NONE   |  NONE   | pins 1 & 2 |
          |       |  41256  |         |         |         |   closed   |
          |-------+---------+---------+---------+---------+------------|
          | 512KB |  NONE   |  NONE   |   (2)   |  NONE   | pins 2 & 3 |
          |       |         |         | 256K x  |         |   closed   |
          |       |         |         |    9    |         |            |
          |-------+---------+---------+---------+---------+------------|
          |  1MB  |  (18)   |  (18)   |  NONE   |  NONE   | pins 1 & 2 |
          |       |  41256  |  41256  |         |         |   closed   |
          |-------+---------+---------+---------+---------+------------|
          |  1MB  |  NONE   |  NONE   |   (2)   |   (2)   | pins 2 & 3 |
          |       |         |         | 256K x  | 256K x  |   closed   |
          |       |         |         |    9    |    9    |            |
          |-------+---------+---------+---------+---------+------------|
          | 1.5MB |  (18)   |  (18)   |   (2)   |  NONE   | pins 1 & 2 |
          |       |  41256  |  41256  | 256K x  |         |   closed   |
          |       |         |         |    9    |         |            |
          |-------+---------+---------+---------+---------+------------|
          |  2MB  |  (18)   |  (18)   |   (2)   |   (2)   | pins 1 & 2 |
          |       |  41256  |  41256  | 256K x  | 256K x  |   closed   |
          |       |         |         |    9    |    9    |            |
          |-------+---------+---------+---------+---------+------------|
          |  2MB  |  (18)   |  NONE   |  NONE   |  NONE   | pins 1 & 2 |
          |       | 411000  |         |         |         |   closed   |
          |-------+---------+---------+---------+---------+------------|
          |  2MB  |  NONE   |  NONE   | (2) 1M  |  NONE   | pins 2 & 3 |
          |       |         |         |   x 9   |         |   closed   |
          |-------+---------+---------+---------+---------+------------|
          |  4MB  |  (18)   |  (18)   |  NONE   |  NONE   | pins 1 & 2 |
          |       | 411000  | 411000  |         |         |   closed   |
          |-------+---------+---------+---------+---------+------------|
          |  4MB  |  NONE   |  NONE   | (2) 1M  | (2) 1M  | pins 2 & 3 |
          |       |         |         |   x 9   |   x 9   |   closed   |
          |-------+---------+---------+---------+---------+------------|
          |  6MB  |  (18)   |  (18)   | (2) 1M  |  NONE   | pins 1 & 2 |
          |       | 411000  | 411000  |   x 9   |         |   closed   |
          |-------+---------+---------+---------+---------+------------|
          |  8MB  |  (18)   |  (18)   | (2) 1M  | (2) 1M  | pins 1 & 2 |
          |       | 411000  | 411000  |   x 9   |   x 9   |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  DRAM MODE CONFIGURATION                   |
          |------------------------------------------------------------|
          |         Mode         | DRAM type |    JP8     |    JP9     |
          |----------------------+-----------+------------+------------|
          |   Page Mode (Four    |   100ns   | pins 1 & 2 | pins 1 & 2 |
          |        page)         |           |   closed   |   closed   |
          |----------------------+-----------+------------+------------|
          | Page Mode (One page) |   100ns   | pins 2 & 3 | pins 1 & 2 |
          |                      |           |   closed   |   closed   |
          |----------------------+-----------+------------+------------|
          |      Fast mode       |   100ns   | pins 1 & 2 | pins 2 & 3 |
          |                      |           |   closed   |   closed   |
          |----------------------+-----------+------------+------------|
          |      Slow mode       |   120ns   | pins 2 & 3 | pins 2 & 3 |
          |                      |           |   closed   |   closed   |
          +------------------------------------------------------------+