
UNIDENTIFIED

386SX-S NON CACHE MAINBOARD MODEL 3

Processor         80386SX/CX486SLC
Processor Speed   25/33/40MHz
Chip Set          Unidentified
Max. Onboard DRAM 16MB
Cache             None
BIOS              AMI
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            JP1      Turbo LED                   JP7

  Turbo switch                JP5      Power LED & keylock         JP8

  Reset switch                JP6      Speaker                     JP9

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                JP3            Closed

      Monitor type select monochrome           JP3             Open

     NPU synchronous with CPU                 JP4           pins 1 & 2
                                                              closed

      NPU asynchronous with CPU                JP4           pins 2 & 3
                                                              closed

     CPU speed select 40MHz                  JP10           pins 1 & 2
                                                              closed

      CPU speed select 33MHz                  JP10           pins 2 & 3
                                                              closed

              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

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

      8MB         (2) 4M x 9         NONE

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

