GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486VC

Processor    80486SX/80487SX/CX486S/CX486S2/80486DX/80486DX2/Pentium
             Overdrive
Processor    20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set     UMC
Max. Onboard 64MB
DRAM
Cache        64/128/256/512KB
BIOS         AMI
Dimensions   230mm x 218mm
I/O Options  32-bit VESA local bus slots (3)
NPU Options  None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J1       Turbo LED                  JP6

  Turbo switch                J2       External power             JP15
                                       control port

  Speaker                     J3       32-bit VESA Local bus       S1
                                       slot

  Power LED & keylock         J4       32-bit VESA Local bus       S2
                                       slot

  Reset switch                J5       32-bit VESA Local bus       S3
                                       slot

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   CMOS memory normal operation           JP13           pins 1 & 2
                                                              closed

      CMOS memory clear                      JP13           pins 2 & 3
                                                              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

      5MB         (4) 1M x 9         NONE

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 256K x 9    (4) 4M x 9

      20MB        (4) 1M x 9      (4) 4M x 9

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

      64MB        (4) 16M x 9        NONE

                            CACHE CONFIGURATION

       Size             Bank 0            Bank 1               TAG

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

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

      256KB           (4) 32K x 8       (4) 32K x 8      (1) 16K x 8/(1)
                                                             32K x 8

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

                        CACHE JUMPER CONFIGURATION

    Size           JP2            JP3            JP4             JP5

    64KB        pins 1 & 2        Open           Open           Open
                 closed

   128KB        pins 2 & 3        Open           Open          Closed
                 closed

   256KB        pins 1 & 2        Open          Closed         Closed
                 closed

   512KB        pins 2 & 3       Closed         Closed         Closed
                 closed

                    CPU TYPE CONFIGURATION

        Type                 JP18                 JP19

       80486SX         pins 2 & 3 closed          Open

       80487SX         pins 1 & 2 closed          Open

       CX486S                N/A                  Open

       CX486S2               N/A                 Closed

       80486DX         pins 1 & 2 closed          Open

      80486DX2         pins 1 & 2 closed          Open

  Pentium Overdrive    pins 1 & 2 closed          Open

                          CPU SPEED CONFIGURATION

  Speed        JP10          JP11         JP12          JP14       JP17

  20MHz     pins 1 & 2    pins 1 & 2    pins 1 & 2   pins 1 & 2    Open
              closed        closed       closed        closed

  25MHz     pins 2 & 3    pins 1 & 2    pins 1 & 2   pins 1 & 2    Open
              closed        closed       closed        closed

  33MHz     pins 2 & 3    pins 2 & 3    pins 2 & 3   pins 1 & 2    Open
              closed        closed       closed        closed

  40MHz     pins 2 & 3    pins 2 & 3    pins 1 & 2   pins 2 & 3    Closed
              closed        closed       closed        closed

  50i MHz   pins 2 & 3    pins 1 & 2    pins 1 & 2   pins 1 & 2    Open
              closed        closed       closed        closed

  50MHz     pins 1 & 2    pins 1 & 2    pins 2 & 3   pins 2 & 3    Closed
              closed        closed       closed        closed

  66i MHz   pins 2 & 3    pins 2 & 3    pins 2 & 3   pins 1 & 2    Open
              closed        closed       closed        closed