
UNIDENTIFIED

OPTI 80386 SYSTEM BOARD

Processor         80386DX
Processor Speed   25/33MHz
Chip Set          Unidentified
Max. Onboard DRAM 16MB
Cache             32/64KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387SX/3167

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Turbo LED                  J14       Power LED & keylock         J18

  Reset switch               J16       Speaker                     J19

  Turbo switch               J17       Riser Card                  S1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                J2             Closed

      Monitor type select monochrome           J2              Open

     Battery type select internal             J5            pins 2 & 3
                                                              closed

      Battery type select external             J5            pins 1 & 4
                                                              closed

     Weitek 3167 installed                    J6             Closed

      Weitek 3167 not installed                J6              Open

     Cache type select pipeline               J7            pins 2 & 3
                                                              closed

      Cache type select non-pipeline           J7            pins 1 & 2
                                                              closed

     NPU enabled                              J8            pins 1 & 2
                                                              closed

      NPU disabled                             J8            pins 2 & 3
                                                              closed

     Factory configured - do not alter        J10           pins 1 & 2
                                                              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

     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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  Note: Bank 2 and Bank 3 are on the riser card.

                         CACHE CONFIGURATION

     Size        Bank 0        Bank 1         TAG0          TAG1

     32KB      (4) 8K x 8       NONE       (3) 8K x 8       NONE

     64KB      (4) 8K x 8    (4) 8K x 8    (3) 8K x 8    (1) 8K x 8

    EXTERNAL MEMORY CARD CONFIGURATION

       Select                J15

   32KB installed     pins 1 & 2 closed

   64KB installed     pins 2 & 3 closed

    Not installed            Open

                   CACHE SIZE CONFIGURATION

        Size                  J9                  J13

        32KB           pins 1 & 2 closed   pins 1 & 2 closed

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

                  CLOCK SELECT CONFIGURATION

       Select                 J3                   J4

      External         pins 1 & 2 closed   pins 1 & 2 closed

      Internal         pins 2 & 3 closed   pins 2 & 3 closed

