UNIDENTIFIED

KMX-16A/-20A/-25A 386SX SYSTEM BOARD

Processor         80386SX
Processor Speed   16/20/25MHz
Chip Set          C&T
Max. Onboard DRAM 16MB
Cache             32KB (with external cache card)
BIOS              AMI/C&T
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                 Location

  Speaker                   J1         External Battery           J13

  Turbo switch              J7         Reset switch               J14

  Turbo LED                 J8         CD-10 32KB External        SL1
                                       Cache Card

  Power LED & keylock       J10

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper/Switch        Position

  »   Factory configured-do not               J2                N/A
      alter

  »   Turbo mode enabled                      J9               Closed

      Turbo mode disabled                     J9                Open

  »   Monitor type select color               J12            pins 1 & 2
                                                               closed

      Monitor type select                     J12            pins 2 & 3
      monochrome                                               closed

  »   Cache card enabled                      W1             pins 1 & 2
                                                               closed

      Cache card disabled                     W1             pins 2 & 3
                                                               closed

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2         Bank 3

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

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

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

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

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

      8MB        (2) 1M 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

[Image]

                     CACHE CONFIGURATION

        Size                Bank 0              Bank 1

  32KB(Two Way Set)      (4) 8KB x 8             NONE

  32KB(Direct Map)       (4) 8KB x 8             NONE

  32KB(Direct Map)           NONE            (4) 16KB x 4

                        CACHE JUMPER CONFIGURATION

        Size             J2         J3        J4         J5         J6

  32KB(Two Way Set)    1 & 2      1 & 2      1 & 2     1 & 2      1 & 2

  32KB(Direct Map)     2 & 3      2 & 3      2 & 3     2 & 3      2 & 3

  32KB(Direct Map)     2 & 3      2 & 3      2 & 3     2 & 3      2 & 3

  Note: Pins designated should be in the closed position.