ABIT COMPUTER CORPORATION

AS420N/AS425N/AS433N/AS455N

Processor         80486SX/80486DX
Processor Speed   20/25/33/40MHz
Chip Set          SIS
Max. Onboard DRAM 32MB
Cache             None
BIOS              AMI
Dimensions        355mm x 304mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Turbo LED                   D6       Reset                      JP20

  External battery           JP15      Speaker                    JP21

  Turbo switch               JP19      Power LED & keylock        JP22

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not alter        JP2             Open

  »   Monitor type select monochrome           JP4             Open

      Monitor type select color                JP4            Closed

  »   CMOS memory normal operation             JP5           pins 1 & 2
                                                              closed

      CMOS memory clear                        JP5           pins 2 & 3
                                                              closed

  »   Factory configured - do not alter        JP6           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        JP8           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       JP14           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       JP17           pins 1 & 2
                                                              closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

     CPU TYPE CONFIGURATION

   Type       JP26      JPX5

  80486SX    Closed     Open

  80486DX     Open     Closed