(TXT) View Source
       
       # CHICONY, INC.
       
          CH-491E
       
         Processor  CX486S/80486SDX/CX487S/80487SX/CX486DX/AM486DX/80486DX/ 
                    CX486DX2/AM486DX2/80486DX2/Pentium Overdrive            
         Processor  20/25/33/40/50(internal)/50/66(internal)MHz             
         Speed      
         Chip Set   Advanced                                                
         Max.       64MB                                                    
         Onboard    
         DRAM       
         Cache      32/64/128/256KB                                         
         BIOS       AMI                                                     
         Dimensions 220mm x 250mm                                           
         I/O        32-bit VESA local bus slots (3)                         
         Options    
         NPU        None                                                    
         Options    
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose          | Location | Purpose           | Location |
          |------------------+----------+-------------------+----------|
          | External battery |    J3    | Speaker           |    J7    |
          |------------------+----------+-------------------+----------|
          | Reset switch     |    J4    | Power LED &       |    J8    |
          |                  |          | keylock           |          |
          |------------------+----------+-------------------+----------|
          | Turbo switch     |    J5    | 32-bit VESA local |  SL1 -   |
          |                  |          | bus slots         |   SL3    |
          |------------------+----------+-------------------+----------|
          | Turbo LED        |    J6    |                   |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |               Function               | Jumper |  Position  |
          |--------------------------------------+--------+------------|
          | » | CMOS memory normal operation     |  JP1   |    Open    |
          |---+----------------------------------+--------+------------|
          |   | CMOS memory clear                |  JP1   |   Closed   |
          |---+----------------------------------+--------+------------|
          |   | Address strobe delay disabled    |  JP7   | pins 1 & 2 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | Address strobe delay enabled     |  JP7   | pins 2 & 3 |
          |   |                                  |        |   closed   |
          |---+----------------------------------+--------+------------|
          | » | PQFP CPU enabled                 |  JP12  |    Open    |
          |---+----------------------------------+--------+------------|
          |   | PQFP CPU disabled                |  JP12  |   Closed   |
          |---+----------------------------------+--------+------------|
          | » | VGA card select normal card      |  JP19  | pins 1 & 2 |
          |   | installed                        |        |   closed   |
          |---+----------------------------------+--------+------------|
          |   | VGA card select Weitek Power     |  JP19  | pins 2 & 3 |
          |   | 9000 card installed              |        |   closed   |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          |       Size       |       Bank 0       |       Bank 1       |
          |------------------+--------------------+--------------------|
          |       1MB        |    (4) 256K x 9    |        NONE        |
          |------------------+--------------------+--------------------|
          |       1MB        |        NONE        |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       4MB        |     (4) 1M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       4MB        |        NONE        |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       16MB       |     (4) 4M x 9     |        NONE        |
          |------------------+--------------------+--------------------|
          |       16MB       |        NONE        |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
          |------------------+--------------------+--------------------|
          |       17MB       |    (4) 256K x 9    |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
          |------------------+--------------------+--------------------|
          |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
          |------------------+--------------------+--------------------|
          |       64MB       |    (4) 16M x 9     |        NONE        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    CACHE CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |   Bank 0    |   Bank 1    |          TAG           |
          |-------+-------------+-------------+------------------------|
          | 32KB  | (4) 8K x 8  |    NONE     |       (1) 8K x 8       |
          |-------+-------------+-------------+------------------------|
          | 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) 16K x 8 or (1) 32K |
          |       |             |             |          x 8           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 CACHE JUMPER CONFIGURATION                 |
          |------------------------------------------------------------|
          |   Size   |   JP2   |   JP3   |   JP4   |   JP5   |   JP6   |
          |----------+---------+---------+---------+---------+---------|
          |   32KB   |  2 & 3  |  2 & 3  |  Open   |  Open   |  Open   |
          |----------+---------+---------+---------+---------+---------|
          |   64KB   |  1 & 2  |  1 & 2  |  Open   |  Open   | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  128KB   |  2 & 3  |  2 & 3  |  Open   | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  256KB   |  1 & 2  |  1 & 2  | Closed  | Closed  | Closed  |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   CPU TYPE CONFIGURATION                   |
          |------------------------------------------------------------|
          |   Type    |     JP15     |  JP16  |  JP17  | JP18  | JP20  |
          |-----------+--------------+--------+--------+-------+-------|
          |  CX486S   |    2 & 3     |  Open  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          |  80486SX  |    2 & 3     |  Open  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          |  CX487S   | 1 & 2, 3 & 4 | 1 & 2  |  Open  | 1 & 2 | 1 & 2 |
          |-----------+--------------+--------+--------+-------+-------|
          |  80487SX  | 1 & 2, 3 & 4 | 2 & 3  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          |  CX486DX  | 1 & 2, 3 & 4 | 1 & 2  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          | AM80486DX | 1 & 2, 3 & 4 | 1 & 2  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          |  80486DX  | 1 & 2, 3 & 4 | 1 & 2  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          | CX486DX2  | 1 & 2, 3 & 4 | 1 & 2  | Closed | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          | AM486DX2  | 1 & 2, 3 & 4 | 1 & 2  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          | 80486DX2  | 1 & 2, 3 & 4 | 1 & 2  |  Open  | 2 & 3 | 2 & 3 |
          |-----------+--------------+--------+--------+-------+-------|
          |   P24T    | 1 & 2, 3 & 4 | 1 & 2  |  Open  | 2 & 3 | 2 & 3 |
          |------------------------------------------------------------|
          | Note: Pins designated should be in the closed position.    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURATION                   |
          |------------------------------------------------------------|
          |   Speed    |    JP8    |    JP9    |   JP10    |   JP11    |
          |------------+-----------+-----------+-----------+-----------|
          |   20Mhz    |  Closed   |  Closed   |  Closed   |  Closed   |
          |------------+-----------+-----------+-----------+-----------|
          |   25MHz    |   Open    |   Open    |  Closed   |  Closed   |
          |------------+-----------+-----------+-----------+-----------|
          |   33MHz    |   Open    |   Open    |  Closed   |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |   40MHz    |   Open    |   Open    |   Open    |  Closed   |
          |------------+-----------+-----------+-----------+-----------|
          |   50iMHz   |   Open    |   Open    |  Closed   |  Closed   |
          |------------+-----------+-----------+-----------+-----------|
          |   50MHz    |   Open    |   Open    |   Open    |   Open    |
          |------------+-----------+-----------+-----------+-----------|
          |   66iMHz   |   Open    |   Open    |  Closed   |   Open    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              VL BUS WAIT STATE CONFIGURATION               |
          |------------------------------------------------------------|
          |          Wait states          |            JP13            |
          |-------------------------------+----------------------------|
          |         0 wait states         |            Open            |
          |-------------------------------+----------------------------|
          |         1 wait state          |           Closed           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 VL BUS SPEED CONFIGURATION                 |
          |------------------------------------------------------------|
          |           CPU speed           |            JP14            |
          |-------------------------------+----------------------------|
          |           <= 33MHz            |            Open            |
          |-------------------------------+----------------------------|
          |            > 33MHz            |           Closed           |
          +------------------------------------------------------------+