CRYSTAL COMPUTER SYSTEMS

CX 425S CACHE


Processor         80386SX/CX486SLC
Processor Speed   25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 16MB
Cache             16/32/64/128KB
BIOS              AMI/Award
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       80387SX/CX83S87


[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J1       Turbo LED                  JP4

  Power LED & keylock         J18       Reset switch               SW1

  Speaker                     J19       Turbo switch               SW2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Battery type select internal             JP1           pins 2 & 3
                                                              closed

      Battery type select external             JP1             Open

  »   Monitor type select color (Auto          JP2             Open
      detect)

      Monitor type select monochrome           JP2            Closed

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     512KB       (2) 256K x 9      NONE           NONE           NONE

      1MB        (2) 256K x 9  (2) 256K x 9       NONE           NONE

     1.5MB       (2) 256K x 9  (2) 256K x 9   (2) 256K x 9       NONE

      2MB        (2) 256K x 9  (2) 256K x 9   (2) 256K x 9   (2) 256K x 9

      2MB        (2) 1M x 9        NONE           NONE           NONE

     2.5MB       (2) 1M x 9    (2) 256K x 9       NONE           NONE

      3MB        (2) 1M x 9    (2) 256K x 9   (2) 256K x 9       NONE

     3.5MB       (2) 1M x 9    (2) 256K x 9   (2) 256K x 9   (2) 256K x 9

      4MB        (2) 1M x 9     (2) 1M x 9        NONE           NONE

     4.5MB       (2) 1M x 9     (2) 1M x 9    (2) 256K x 9       NONE

      5MB        (2) 1M x 9     (2) 1M x 9    (2) 256K x 9   (2) 256K x 9

      6MB        (2) 1M x 9     (2) 1M x 9     (2) 1M x 9        NONE

     6.5MB       (2) 1M x 9     (2) 1M x 9     (2) 1M x 9    (2) 256K x 9

      8MB        (2) 1M x 9     (2) 1M x 9     (2) 1M x 9     (2) 1M x 9

      8MB        (2) 4M x 9        NONE           NONE           NONE

     8.5MB       (2) 4M x 9    (2) 256K x 9       NONE           NONE

      9MB        (2) 4M x 9    (2) 256K x 9   (2) 256K x 9       NONE

     9.5MB       (2) 4M x 9    (2) 256K x 9   (2) 256K x 9   (2) 256K x 9

     10MB        (2) 4M x 9     (2) 1M x 9        NONE           NONE

    10.5MB       (2) 4M x 9     (2) 1M x 9    (2) 256K x 9       NONE

     11MB        (2) 4M x 9     (2) 1M x 9    (2) 256K x 9   (2) 256K x 9

     12MB        (2) 4M x 9     (2) 1M x 9     (2) 1M x 9        NONE

    12.5MB       (2) 4M x 9     (2) 1M x 9     (2) 1M x 9    (2) 256K x 9

     14MB        (2) 4M x 9     (2) 1M x 9     (2) 1M x 9     (2) 1M x 9

     16MB        (2) 4M x 9     (2) 4M x 9        NONE           NONE

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (U32)      TAG (U33)

     16KB        (2) 8K x 8        NONE       (1) 8K x 8        NONE

     32KB        (2) 8K x 8     (2) 8K x 8    (1) 8K x 8        NONE

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

     128KB      (2) 32K x 8    (2) 32K x 8    (1) 8K x 8     (1) 8K x 8

                     CACHE JUMPER CONFIGURATION

   Size      JP3      JP5       JP6       JP7      JP8       JP9

   16KB     Open      Open     Open      2 & 3     Open     2 & 3

   32KB     Open     Closed    Open      2 & 3     Open     2 & 3

   64KB     Open     Closed    Closed    1 & 2     Open     2 & 3

  128KB     Closed   Closed    Closed    1 & 2    Closed    1 & 2

  Note: Pins designated should be in the closed position.