GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486PA

Processor        80486SX/80486DX/80486DX2
Processor Speed  16/20/25/33/50(internal)/50/66(internal)MHz
Chip Set         OPTi
Max. Onboard DRAM32MB
Cache            64/128/256/512KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      None
NPU Options      4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Power LED & keylock          J1       Turbo switch               J4

  Reset switch                 J2       Turbo LED                  J5

  Speaker                      J3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select color               J23             Closed

      Monitor type select monochrome          J23              Open

           DRAM CONFIGURATION

     Size        Bank 0        Bank 1

     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

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

      64KB        (4) 8K x 8      (4) 8K x 8     (2) 32K x 1

     128KB        (4) 32K x 8        NONE        (2) 32K x 1

     256KB        (4) 32K x 8     (4) 32K x 8    (2) 32K x 1

     512KB       (4) 128K x 8        NONE        (2) 32K x 1

                        CACHE JUMPER CONFIGURATION

    Size           JP8            JP17           JP18           JP19

    64KB        pins 2 & 3        Open           Open           Open
                 closed

   128KB        pins 1 & 2       Closed          Open           Open
                 closed

   256KB        pins 2 & 3       Closed         Closed          Open
                 closed

   512KB        pins 1 & 2       Closed         Closed         Closed
                 closed

          CPU TYPE CONFIGURATION

        Type                  J7

       80486SX        pins 1 & 2 closed

       80486DX        pins 2 & 3 closed

      80486DX2        pins 2 & 3 closed

  CPU SPEED CONFIGURATION

    Speed           J6

    16MHz         Closed

    20MHz         Closed

    25MHz          Open

    33MHz          Open

    50iMHz         Open

    50MHz          Open

    66iMHz         Open