
CHICONY, INC.

CH-48633C

Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Power LED & keylock         J3       External battery            J11

  Speaker                     J4       Turbo LED                   JP1

  Turbo switch                J5       Reset switch                S6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                JP1            Closed

      Monitor type select monochrome           JP1             Open

     Factory configured - do not alter        JP9             Open

     CPU speed select iOSC/2                 JP10           pins 2 & 3
                                                              closed

      CPU speed select iOSC/1                 JP10           pins 1 & 2
                                                              closed

           DRAM CONFIGURATION

     Size        Bank 0        Bank 1

     4MB        (4) 1M x 9      NONE

     8MB        (4) 1M x 9   (4) 1M x 9

     16MB       (4) 4M x 9      NONE

     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 (U34,U36)     TAG (U40)   TAG (U41)

   64KB      (4) 8K     (4) 8K    (2) 64K x 1      (1) 8K x       NONE
              x 8        x 8                          8

   128KB     (4) 32K    NONE      (2) 64K x 1      (1) 8K x       NONE
              x 8                                     8

   256KB     (4) 32K   (4) 32K    (2) 64K x 1      (1) 8K x    (1) 8K x 8
              x 8        x 8                          8

                   CACHE JUMPER CONFIGURATION

   Size        JP2        JP4        JP5        JP7       JP8

   64KB       Open       Open       2 & 3      Open       Open

   128KB     Closed      Open       1 & 2      Open      Closed

   256KB     Closed     Closed      2 & 3     Closed     Closed

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

      Type             JP11                JP12                JP13

    80486SX         pins 2 & 3      pins 2 & 3 closed       pins 1 & 2
                      closed                                  closed

    80487SX         pins 2 & 3      pins 1 & 2 and 3 &      pins 1 & 2
                      closed             4 closed             closed

    80486DX         pins 1 & 2      pins 1 & 2 and 3 &      pins 2 & 3
                      closed             4 closed             closed

   CPU SPEED CONFIGURATION

   Type     JP14      JP15

  25MHz     Open      Open

  33MHz     Closed    Open

