UNIDENTIFIED

486-25/33 CACHE

Processor         80486DX
Processor Speed   25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/128KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Reset switch               JP1       Turbo switch               JP10

  Speaker                    JP2       Turbo LED                  JP11

  External battery           JP8       32-bit external             S1
                                       memory card

  Power LED & keylock        JP9

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color                JP6           pins 2 & 3
                                                              closed

      Monitor type select monochrome           JP6           pins 1 & 2
                                                              closed

  »   CMOS memory normal operation             JP7           pins 1 & 2
                                                              closed

      CMOS memory clear                        JP7           pins 2 & 3
                                                              closed

  »   CPU speed select switchable at          JP10            Closed
      keyboard

      CPU speed select forced fast            JP10             Open

                            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

     3MB       (4) 256K x 9   (4) 256K x 9   (4) 256K x 9       NONE

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

     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    (4) 1M x 9        NONE

     7MB       (4) 256K x 9   (4) 256K x 9    (4) 1M x 9    (4) 256K x 9

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

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

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

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

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

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

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

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

  Note:Banks 2 & 3 are used when a 32-bit external memory card is
  installed at S1.

                         CACHE CONFIGURATION

     Size        Bank 0        Bank 1         T 1            T2

     64KB      (8) 8K x 8       NONE       (1) 8K x 8    (1) 8K x 8

    128KB      (8) 8K x 8    (8) 8K x 8    (1) 8K x 8       NONE

                 CACHE JUMPER CONFIGURATION

   Size       J1        J2         J3        J4        J5

   64KB      1 & 2     1 & 2     1 & 2     1 & 2     1 & 2

  128KB      2 & 3     2 & 3     2 & 3     2 & 3     2 & 3

  Note: Pins designated should be in the closed position.