
CHICONY, INC.

CH-471A

Processor  CX486S/80486SX/SL80486SX/CX486S2/CX486DX/AM486DXL/80486DX/ SL80486DX/
           AM486DXL2/80486DX2/SL80486DX2/P24D/80486DX4/Pentium Overdrive
Processor  20/25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   SIS
Max.       128MB
Onboard
DRAM
Cache      32/64/128/256/512/1024KB
BIOS       Award
Dimensions 254mm x 218mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Reset switch                J3       Speaker                     J8

  Green PC connector          J4       External battery           JP19

  Turbo switch                J5       Green PC connector         JP38

  Turbo LED                   J6       Green PC connector         JP39

  Power LED & keylock         J7       32-bit VESA local bus   SL1 - SL3
                                       slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CPU clock down control select           JP6           pins 1 & 2
      STPCLK                                                  closed

      CPU clock down control select           JP6           pins 2 & 3
      SMOUT0                                                  closed

     CMOS memory normal operation            JP7           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP7           pins 2 & 3
                                                              closed

     Factory configured - do not             JP17             N/A
      alter

      CPU type select all CPU types           JP22             Open

      CPU type select CX486S2 only            JP22            Closed

     Factory configured - do not             JP37             N/A
      alter

     Address strobe type select              JP40          pins 1 & 2
      normal                                                  closed

      Address strobe type select              JP40          pins 2 & 3
      delayed                                                 closed

     Factory configured - do not             JP45             N/A
      alter

  Note: The location of JP40 is unidentified.

                            DRAM CONFIGURATION

     Size         Bank 0          Bank 1         Bank 2         Bank 3

     1MB         (1) 256K x        NONE           NONE           NONE
                    36

     2MB         (1) 256K x     (1) 256K x        NONE           NONE
                    36              36

     2MB         (1) 512K x        NONE           NONE           NONE
                    36

     4MB         (1) 256K x     (1) 256K x     (1) 512K x        NONE
                    36              36             36

     4MB         (1) 512K x     (1) 512K x        NONE           NONE
                    36              36

     4MB        (1) 1M x 36        NONE           NONE           NONE

     5MB         (1) 256K x    (1) 1M x 36        NONE           NONE
                    36

     6MB         (1) 256K x     (1) 256K x    (1) 1M x 36        NONE
                    36              36

     6MB         (1) 512K x    (1) 1M x 36        NONE           NONE
                    36

     8MB         (1) 256K x     (1) 256K x     (1) 512K x    (1) 1M x 36
                    36              36             36

     8MB         (1) 512K x     (1) 512K x    (1) 1M x 36        NONE
                    36              36

     8MB        (1) 1M x 36    (1) 1M x 36        NONE           NONE

     8MB        (1) 2M x 36        NONE           NONE           NONE

     10MB        (1) 256K x     (1) 256K x    (1) 1M x 36    (1) 1M x 36
                    36              36

     12MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 1M x 36
                    36              36

     12MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     16MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     16MB       (1) 2M x 36    (1) 2M x 36        NONE           NONE

     16MB       (1) 4M x 36        NONE           NONE           NONE

     17MB        (1) 256K x    (1) 4M x 36        NONE           NONE
                    36

     18MB        (1) 256K x     (1) 256K x    (1) 4M x 36        NONE
                    36              36

     18MB        (1) 512K x    (1) 4M x 36        NONE           NONE
                    36

     20MB        (1) 512K x     (1) 512K x    (1) 4M x 36        NONE
                    36              36

     20MB       (1) 1M x 36    (1) 4M x 36        NONE           NONE

     24MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 4M x 36
                    36              36

     24MB       (1) 1M x 36    (1) 1M x 36    (1) 4M x 36        NONE

     24MB       (1) 2M x 36    (1) 2M x 36    (1) 2M x 36        NONE

     32MB       (1) 4M x 36    (1) 4M x 36        NONE           NONE

     32MB       (1) 2M x 36    (1) 2M x 36    (1) 2M x 36    (1) 2M x 36

     32MB       (1) 8M x 36        NONE           NONE           NONE

                        DRAM CONFIGURATION (CON'T)

     Size          Bank 0          Bank 1        Bank 2         Bank 3

     36MB         (1) 512K x     (1) 512K x    (1) 4M x 36   (1) 4M x 36
                     36              36

     36MB        (1) 1M x 36    (1) 4M x 36    (1) 4M x 36       NONE

     36MB        (1) 1M x 36    (1) 8M x 36       NONE           NONE

     40MB        (1) 1M x 36    (1) 1M x 36    (1) 4M x 36   (1) 4M x 36

     40MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36       NONE

     48MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36       NONE

     48MB        (1) 4M x 36    (1) 8M x 36       NONE           NONE

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36   (1) 4M x 36

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36       NONE

     64MB        (1) 16M x 36       NONE          NONE           NONE

     64MB        (1) 8M x 36    (1) 8M x 36       NONE           NONE

     65MB         (1) 256K x    (1) 16M x 36      NONE           NONE
                     36

     68MB        (1) 1M x 36    (1) 16M x 36      NONE           NONE

     68MB        (1) 1M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     72MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36   (1) 8M x 36

     72MB        (1) 1M x 36    (1) 1M x 36     (1) 16M x        NONE
                                                   36

     80MB        (1) 4M x 36    (1) 16M x 36      NONE           NONE

     80MB        (1) 4M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     96MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36   (1) 8M x 36

     96MB        (1) 8M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     96MB        (1) 4M x 36    (1) 4M x 36     (1) 16M x        NONE
                                                   36

     128MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

     128MB       (1) 16M x 36   (1) 16M x 36      NONE           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

     512KB       (4) 128K x 8        NONE        (1) 32K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (1) 64K x 8

                        CACHE JUMPER CONFIGURATION

   Size      JP1      JP2      JP3     JP4      JP5      JP14      JP16

   32KB     1 & 2,    2 & 3   1 & 2    1 & 2    1 & 2   1 & 2     1 & 2
            3 & 4

   64KB     2 & 3,    1 & 2   1 & 2    2 & 3    1 & 2   1 & 2     1 & 2
            4 & 5

   128KB    1 & 2,    2 & 3   2 & 3    2 & 3    1 & 2   1 & 2     2 & 3
            3 & 4

   256KB    2 & 3,    1 & 2   2 & 3    2 & 3    2 & 3   1 & 2     2 & 3
            4 & 5

   512KB    1 & 2,    2 & 3   2 & 3    2 & 3    2 & 3   2 & 3     2 & 3
            3 & 4

    1MB     2 & 3,    1 & 2   2 & 3    2 & 3    2 & 3   2 & 3     2 & 3
            4 & 5

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type        JP10        JP11        JP20         JP21        JP23

    CX486S       2 & 3       1 & 2       2 & 3        Open        Open

   80486SX       1 & 2       2 & 3       2 & 3        Open        Open

  SL80486SX      1 & 2       2 & 3       2 & 3        Open        1 & 2

   CX486DX       2 & 3       1 & 2       1 & 2       Closed       Open

   AM486DXL      1 & 2       2 & 3       1 & 2       Closed       Open

   80486DX       1 & 2       2 & 3       1 & 2       Closed       Open

  SL80486DX      1 & 2       2 & 3       1 & 2       Closed       1 & 2

   CX486DX2      2 & 3       1 & 2       1 & 2       Closed       Open

  AM486DXL2      1 & 2       2 & 3       1 & 2       Closed       Open

  SL80486DX2     1 & 2       2 & 3       1 & 2       Closed       1 & 2

     P24D        1 & 2       2 & 3       1 & 2       Closed       2 & 3

   80486DX4      1 & 2       2 & 3       1 & 2       Closed       1 & 2

     P24T        1 & 2       1 & 2       1 & 2       Closed       Open

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

      Type         JP24       JP25       JP26        JP27         JP28

     CX486S       2 & 3     2 & 3, 4   1 & 2, 3      Open         Open
                              & 5        & 4

    80486SX        Open       Open       Open        Open         Open

   SL80486SX      4 & 5      3 & 4      2 & 3        Open         Open

    CX486DX       2 & 3      2 & 3     1 & 2, 3      Open         Open
                                         & 4

    AM486DXL       Open       Open       Open        Open         Open

    80486DX        Open       Open       Open        Open         Open

   SL80486DX      4 & 5      3 & 4      2 & 3        Open         Open

    CX486DX2      2 & 3      2 & 3     1 & 2, 3      Open         Open
                                         & 4

   AM486DXL2       Open       Open       Open        Open         Open

   SL80486DX2     4 & 5      3 & 4      2 & 3        Open         Open

      P24D        4 & 5     1 & 2, 3    2 & 3       Closed       Closed
                              & 4

    80486DX4      4 & 5      3 & 4      2 & 3        Open         Open

      P24T        1 & 2      3 & 4      2 & 3        Open         Open

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     Type         JP29        JP30        JP31        JP33        JP36

    CX486S       2 & 3       2 & 3        Open        2 & 3       1 & 2

   80486SX       2 & 3        Open        Open        Open        Open

  SL80486SX      2 & 3        Open        Open        Open        1 & 2

   CX486DX       2 & 3       2 & 3        3 & 4       2 & 3       1 & 2

   AM486DXL      2 & 3       3 & 4        1 & 2       Open        2 & 3

   80486DX       2 & 3        Open        3 & 4       Open        Open

  SL80486DX      2 & 3        Open        3 & 4       Open        1 & 2

   CX486DX2      2 & 3       2 & 3        3 & 4       2 & 3       1 & 2

  AM486DXL2      2 & 3       3 & 4        1 & 2       Open        2 & 3

  SL80486DX2     2 & 3        Open        3 & 4       Open        1 & 2

     P24D        1 & 2        Open        3 & 4       Open        1 & 2

   80486DX4      2 & 3        Open        3 & 4       Open        1 & 2

     P24T        1 & 2       1 & 2        2 & 3       1 & 2       1 & 2

  Note: Pins designated should be in the closed position.

          CPU SPEED CONFIGURATION

   Speed      JP8        JP12      JP13

   20MHz      Open       Open      Open

   25MHz      Open       Open     Closed

   33MHz     Closed     Closed    Closed

   40MHz      Open      Closed    Closed

  50iMHz      Open       Open     Closed

   50MHz     Closed      Open      Open

  66iMHz     Closed     Closed    Closed

  75iMHz      Open       Open     Closed

  100iMHz    Closed     Closed    Closed

                         CPU VOLTAGE CONFIGURATION

     Voltage             JP32               JP34               JP35

       3.3v            pins 2 & 3        pins 2 & 3         pins 2 & 3
                        closed             closed             closed

        5v             pins 1 & 2        pins 1 & 2         pins 1 & 2
                        closed             closed             closed

      VESA WAIT STATE CONFIGURATION

     Wait states             JP44

    0 wait states     pins 1 & 2 closed

    1 wait state      pins 2 & 3 closed

         BUS SPEED CONFIGURATION

      CPU speed              JP47

      <= 33MHz        pins 1 & 2 closed

       > 33MHz        pins 2 & 3 closed

