
UNIDENTIFIED

ALI 386SX MAINBOARD

Processor         80386SX/CX486SLC
Processor Speed   16/20/25/33MHz
Chip Set          None
Max. Onboard DRAM 16MB
SRAM Cache        None
BIOS              AMI
Dimensions        216mm x 170mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J4       Turbo switch & LED          J8

  Reset switch                J6       Power LED & keylock         J9

  Speaker                     J7

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     ADS signal delay disabled                 J5           pins 2 & 3
                                                              closed

      ADS signal delay enabled                  J5           pins 1 & 2
                                                              closed

     NPU mode select synchronous with         JP2           pins 1 & 2
      CPU                                                     closed

      NPU mode select asynchronous             JP2           pins 2 & 3
                                                              closed

     RTC type select 146816                   JP3             open

      RTC type select DS1287                   JP3            closed

     Monitor type select monochrome           JP4             open

      Monitor type select color                JP4            closed

     Parity check enabled                     JP6             open

      Parity check disabled                    JP6            closed

                   BUS CLOCK CONFIGURATION

      CPU Speed              JP1                  JP5

        33MHz          pins 2 & 3 closed   pins 2 & 3 closed

        25MHz          pins 1 & 2 closed   pins 1 & 2 closed

        20MHz          pins 2 & 3 closed   pins 1 & 2 closed

        16MHz          pins 1 & 2 closed   pins 1 & 2 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

