GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486QS

Processor         80486SX/80486DX
Processor Speed   20/25/33MHz
Chip Set          ETEQ
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI/MR
Dimensions        330.2mm x 218.4mm
I/O Options       32-bit external memory card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Reset switch               J3        Turbo LED                  JP7

  Turbo switch               J4        External battery           JP9

  Speaker                    JP2       32-bit external             S1
                                       memory card

  Power LED & keylock        JP6

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

  »   CMOS memory normal operation             JP8            Closed

      CMOS memory clear                        JP8             Open

  »   Monitor type select color                JP26          pins 1 & 2
                                                              closed

      Monitor type select monochrome           JP26          pins 2 & 3
                                                              closed

  »   CPU type select 80486SX                  JP31          pins 2 & 3
                                                              closed

      CPU type select 80486DX                  JP31          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

            CACHE CONFIGURATION

     Size          Bank 0          TAG

     64KB        (8) 8K x 8    (2) 16K x 4

     256KB       (8) 32K x 8   (2) 16K x 4

                        CACHE JUMPER CONFIGURATION

   Size        JP18        JP19        JP20          JP21         JP22

   64KB        Open        Open      pins 2 & 3    pins 2 & 3     Open
                                      closed        closed

   256KB      Closed      Closed     pins 1 & 2    pins 1 & 2    Closed
                                      closed        closed

  Note: Main board may be factory configured with 256KB cache in which
  case JP18 - JP22 will not be present