(TXT) View Source
       
       # YOUNG MICRO SYSTEMS, INC.
       
          VS486F (REV. 2.0)
       
          Processor              80486SX/80487SX/80486DX/80486DX2        
          Processor Speed        25/33/50(internal)/50/66(internal)MHz   
          Chip Set               Symphony                                
          Video Chip Set         None                                    
          Maximum Onboard Memory 32MB                                    
          Maximum Video Memory   None                                    
          Cache                  64/256KB                                
          BIOS                   AMI                                     
          Dimensions             330mm x 218mm                           
          I/O Options            None                                    
          NPU Options            4167                                    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose             | Location | Purpose        | Location |
          |---------------------+----------+----------------+----------|
          | Speaker             |    J1    | Turbo LED      |    J4    |
          |---------------------+----------+----------------+----------|
          | Power LED & keylock |    J2    | Turbo switch   |    J5    |
          |---------------------+----------+----------------+----------|
          | Reset switch        |    J3    |                |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     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) 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    |
          |------------------+--------------------+--------------------|
          |       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   |
          |-----------+----------------+---------------+---------------|
          |   256KB   |  (4) 32K x 8   |  (4) 32K x 8  |  (1) 32K x 8  |
          |------------------------------------------------------------|
          | Note: The location of the banks and TAG are unidentified.  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |  Size  | SW1/3  | SW1/4  | SW1/5  | SW1/6  | SW1/7 | SW1/8 |
          |--------+--------+--------+--------+--------+-------+-------|
          |  64KB  |  Off   |   On   |  Off   |   On   |  Off  |  On   |
          |--------+--------+--------+--------+--------+-------+-------|
          | 256KB  |   On   |  Off   |   On   |  Off   |  On   |  Off  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CPU SPEED SELECTION                     |
          |------------------------------------------------------------|
          |       Speed        |       SW1/1       |       SW1/2       |
          |--------------------+-------------------+-------------------|
          |       25MHz        |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |       33MHz        |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |       50iMHz       |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |       50MHz        |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |       66iMHz       |        Off        |        On         |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     CPU TYPE SELECTION                     |
          |------------------------------------------------------------|
          |  Type   |SW2/1 |SW2/2 |SW2/3 |SW2/4|SW2/5|SW2/6|SW2/7|SW2/8|
          |---------+------+------+------+-----+-----+-----+-----+-----|
          | 80486SX | Off  |  On  | Off  | On  | On  | Off | Off | Off |
          |---------+------+------+------+-----+-----+-----+-----+-----|
          | 80486DX | Off  |  On  |  On  | On  | Off | On  | On  | On  |
          |---------+------+------+------+-----+-----+-----+-----+-----|
          |80486DX2 | Off  |  On  |  On  | On  | Off | On  | Off | Off |
          +------------------------------------------------------------+