
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

