UNIDENTIFIED

386SX MAINBOARD

Processor              80386SX
Processor Speed        16/20/25/33MHz
Chip Set               Unidentified
Max. Onboard DRAM      16MB
Cache                  None
BIOS                   Award
Dimensions             254mm x 220mm
I/O Options            Floppy drive interface, IDE interface, parallel
                       port, PS/2 mouse port, serial ports (2), VGA port
NPU Options            80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  VGA port                    CN1      Speaker                     J2

  Parallel port               CN2      IDE interface LED           J3

  Serial port 1               CN3      Reset switch                J4

  Serial port 2               CN4      Turbo switch                J5

  PS/2 mouse port             CN5      Turbo LED                   J6

  IDE interface               CN6      External battery            J8

  Floppy drive interface      CN7      Riser Card                  SL1

  Power LED & keylock         J1

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

  »   Battery type select internal              J7           pins 1 & 2
                                                              closed

      Battery type select external              J7           pins 2 & 3
                                                              closed

  »   Monitor type select monochrome           JP2            Closed

      Monitor type select color                JP2             Open

  »   CMOS memory normal operation             JP6           pins 1 & 3
                                                              closed

      CMOS memory clear                        JP6           pins 2 & 4
                                                              closed

  »   Video mode select interlaced             JP7            Closed

      Video mode select non-interlaced         JP7             Open

  »   On board VGA enabled                     JP12          pins 2 & 3
                                                              closed

      On board VGA disabled                    JP12          pins 1 & 2
                                                              closed

  »   Monitor type select VESA                 JP14          pins 1 & 2
                                                              closed

      Monitor type select VGA                  JP14          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