UNIDENTIFIED

A-B 333SX

Processor         AM386SX/80386SX
Processor Speed   25/33MHz
Chip Set          Unidentified
Max. Onboard DRAM 16MB
Cache             16/32/64/128KB
BIOS              AMI
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       80387SX (exact location unidentified)

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            J10       Turbo switch               JP9

  Power LED & keylock         J15       Turbo LED                 JP12

  Speaker                     J18       Reset switch              JP13

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP8           pins 2 & 3
      (internal battery)                                      closed

      CMOS memory normal operation            JP8              Open
      (external battery)

      CMOS memory clear                       JP8           pins 1 & 2
                                                              closed

  »   Monitor type select color               JP10            Closed

      Monitor type select monochrome          JP10             Open

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

     512KB        (2) 256K x 9       NONE

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

      2MB         (2) 1M x 9         NONE

     2.5MB        (2) 1M x 9     (2) 256K x 9

      4MB         (2) 1M x 9      (2) 1M x 9

      8MB         (2) 4M x 9         NONE

      16MB        (2) 4M x 9      (2) 4M x 9

            CACHE CONFIGURATION

     Size          Bank 0        Bank 1

     16KB        (2) 8K x 8       NONE

     32KB        (2) 8K x 8    (2) 8K x 8

     64KB        (2) 32K x 8      NONE

     128KB       (2) 32K x 8   (2) 32K x 8

                        CACHE JUMPER CONFIGURATION

    Size           JP1            JP2            JP3             JP4

    16KB        pins 2 & 3        Open           Open         pins 2 & 3
                 closed                                        closed

    32KB        pins 1 & 2     pins 2 & 3     pins 1 & 2      pins 2 & 3
                 closed          closed         closed         closed

    64KB        pins 1 & 2     pins 1 & 2     pins 2 & 3      pins 2 & 3
                 closed          closed         closed         closed

    128KB       pins 1 & 2     pins 1 & 2     pins 2 & 3      pins 1 & 2
                 closed          closed         closed         closed

  Note: Jumper location is approximated, check board for actual location.