
UNIDENTIFIED

386SX-S NON CACHE MAINBOARD MODEL 1

Processor         80386SX
Processor Speed   16/20/25MHz
Chip Set          Unidentified
Max. Onboard DRAM 16MB
Cache             None
BIOS              Unidentified
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                JP2            Closed

      Monitor type select monochrome           JP2             Open

     NPU synchronous with CPU                 JP3           pins 1 & 2
                                                              closed

      NPU asynchronous with CPU                JP3           pins 2 & 3
                                                              closed

     Pipeline mode disabled                   JP4           pins 1 & 2
                                                              closed

      Pipeline mode enabled                    JP4           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

