
FOREX COMPUTER CORPORATION

80386SX-25/33

Processor         80386SX
Processor Speed   25/33MHz
Chip Set          Forex
Max. Onboard DRAM 16MB
Cache             16/64KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            JP2      Power LED & keylock         JP9

  Turbo LED                   JP7      Speaker                    JP10

  Reset switch                JP8      Turbo switch               JP11

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome           JP3            Closed

      Monitor type select color                JP3             Open

     Factory configured - do not alter       JP12            Closed

     CMOS memory normal operation            JP13             Open

      CMOS memory clear                       JP13            Closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     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

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

     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       TAG (U15)      TAG (U16)

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

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

                  CACHE JUMPER CONFIGURATION

        Size                 JP6A                 JP6B

        16KB           pins 1 & 2 closed   pins 1 & 2 closed

        64KB           pins 2 & 3 closed   pins 2 & 3 closed

