JC INFORMATION SYSTEMS CORPORATION

386DX WBC 2025

Processor         80386DX
Processor Speed   25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card slot
NPU Options       80387/3167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Turbo switch               J5        External battery           J10

  Reset switch               J6        Turbo LED                  JP4

  Speaker                    J7        32-bit external             S1
                                       memory card

  Power LED & keylock        J8

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color                JP1            Closed

      Monitor type select monochrome           JP1             Open

  »   CMOS memory normal operation             JP2          pins 2 & 3
                                                              closed

      CMOS memory clear                        JP2          pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        JP3            Closed

  »   Factory configured - do not alter        JP5          pins 2 & 3
                                                              closed

  »   Factory configured - do not alter        JP6          pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        JP7          pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        JP8          pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        JP9          pins 2 & 3
                                                              closed

  »   Factory configured - do not alter       JP10          pins 1 & 2
                                                              closed

      Note : The locations of jumpers JP3, JP5, JP6, JP7, JP8, JP9 and
      JP10 are unidentified.

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

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

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1 M x 9    (4) 256K x 9

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

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

                        CACHE CONFIGURATION

      Size            Bank 0          TAG (U1)      TAG (U2 & U3)

      64KB          (8) 8K x 8      (1) 16K x 4      (2) 4K x 4