SHUTTLE COMPUTER INTERNATIONAL, INC.

80386SX-20 CACHE MAINBOARD

Processor         80386SX
Processor Speed   20MHz
Chip Set          OPTI
Max. Onboard DRAM 16MB
Cache             64KB
BIOS              AMI
Dimensions        248mm x 330mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Turbo LED                   JP8       Reset switch               S2

  Power LED & keylock         J22       Turbo switch               S3

  Speaker                     J21

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

  »   Monitor type select color                JP2            Closed

      Monitor type select monochrome           JP2             Open

                            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

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

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

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

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

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

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

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

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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     16KB        (4) 4K x 8     (4) 4K x 8    (3) 16K x 4

     32KB        (4) 8K x 8        NONE       (3) 16K x 4

     64KB        (4) 8K x 8     (4) 8K x 8    (3) 16K x 4

  Note:The location of the cache is unidentified.

                   CACHE JUMPER CONFIGURATION

   Size        JP3        JP4        JP5        JP6       JP7

   16KB       1 & 2      1 & 2      1 & 2      Open       Open

   32KB       2 & 3      1 & 2      1 & 2     Closed      Open

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

  Note: Pins designated should be in the closed position.