CORE PACIFIC ELECTRONICS, INC.

486 MAINBOARD

Processor         80486DX
Processor Speed   33MHz
Chip Set          OPTI
Max. Onboard DRAM 40MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            JP3      Turbo LED                  JP15

  Reset switch               JP13      Speaker                    JP16

  Turbo switch               JP14      Power LED & keylock        JP17

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Power good signal detect from            JP1           pins 2 & 3
      board                                                   closed

      Power good signal detect from            JP1           pins 1 & 2
      power supply                                            closed

  »   Monitor type select color                JP2            Closed

      Monitor type select monochrome           JP2             Open

  »   Factory configured - do not alter       JP12             Open

  »   CMOS memory normal operation            JP18           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP18           pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0          Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9       NONE           NONE           NONE

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

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

     5MB        (4) 256K x 9    (4) 1M x 9        NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9    (1) 1M x 36       NONE

     8MB        (4) 1M x 9      (4) 1M x 9        NONE           NONE

     9MB        (4) 256K x 9    (4) 1M x 9     (1) 1M x 36       NONE

     10MB       (4) 256K x 9   (4) 256K x 9    (1) 1M x 36   (1) 1M x 36

     12MB       (4) 1M x 9      (4) 1M x 9     (1) 1M x 36       NONE

     13MB       (4) 256K x 9    (4) 1M x 9     (1) 1M x 36   (1) 1M x 36

     16MB       (4) 1M x 9      (4) 1M x 9     (1) 1M x 36   (1) 1M x 36

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

     20MB       (4) 1M x 9      (4) 4M x 9        NONE           NONE

     20MB       (4) 4M x 9      (4) 1M x 9        NONE           NONE

     24MB       (4) 1M x 9      (4) 4M x 9     (1) 1M x 36       NONE

     24MB       (4) 4M x 9      (4) 1M x 9     (1) 1M x 36       NONE

     28MB       (4) 1M x 9      (4) 4M x 9     (1) 1M x 36   (1) 1M x 36

     28MB       (4) 4M x 9      (4) 1M x 9     (1) 1M x 36   (1) 1M x 36

     32MB       (4) 4M x 9      (4) 4M x 9        NONE           NONE

     36MB       (4) 4M x 9      (4) 4M x 9     (1) 1M x 36       NONE

     40MB       (4) 4M x 9      (4) 4M x 9     (1) 1M x 36   (1) 1M x 36

                    CACHE CONFIGURATION

     Size          Bank 0          U39            U40

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

     256KB      (8) 32K x 8    (1) 32K x 8    (1) 64K x 1

       CACHE JUMPER CONFIGURATION

   Size      JP4       JP5       JP6

   64KB      Open     Open      Open

  256KB     Closed   Closed    Closed

                          CPU TYPE CONFIGURATION

       Type               JP8               JP9               JP10

      80486SX            Open            pins 2 & 3           Open
                                          closed

      80487SX           Closed           pins 1 & 2         pins 1 & 2
                                          closed             closed

      80486DX           Closed           pins 1 & 2         pins 2 & 3
                                          closed             closed