
GIGA-BYTE TECHNOLOGY CO., LTD.

GA-486VS

Processor  80486SX/80487SX/CX486S/CX486S2/80486DX/80486DX4/ODP486SX/
           80486DX2/Pentium Overdrive
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   SIS
Max.       128MB
Onboard
DRAM
Cache      64/128/256/512KB
BIOS       Award
Dimensions 230mm x 218mm
I/O        32-bit VESA local bus slots (3)
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  External battery           J1       External power control      JP33
                                      port

  Turbo switch               J3       Green LED connector         JP34

  Turbo LED                  J4       32-bit VESA Local bus        S1
                                      slot

  Speaker                    J5       32-bit VESA Local bus        S2
                                      slot

  Reset switch               J6       32-bit VESA Local bus        S3
                                      slot

  Power LED & keylock        J7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             JP2              N/A
      alter

     Factory configured - do not             JP8              N/A
      alter

     Factory configured - do not             JP9              N/A
      alter

     Non AMD CPU selection                   JP11            Closed

      AMD CPU selection                       JP11             Open

     CMOS memory normal operation            JP16          pins 1 & 2
                                                              closed

      CMOS memory clear                       JP16          pins 2 & 3
                                                              closed

     Monitor type select CGA                 JP17             Open

      Monitor type select all others          JP17            Closed

     Factory configured - do not             JP20          pins 2 & 3
      alter                                                   closed

     DX4 CPU x 3 installed                   JP24             Open

      DX4 CPU x 2 installed                   JP24            Closed

     Green PC normal operation               JP26             Open

      Green PC Green mode                     JP26            Closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2          Bank 3

     1MB         (1) 256K x       NONE           NONE            NONE
                    36

     2MB         (1) 256K x     (1) 256K x       NONE            NONE
                    36             36

     2MB         (1) 512K x       NONE           NONE            NONE
                    36

     4MB         (1) 256K x     (1) 256K x     (1) 512K x        NONE
                    36             36             36

     4MB         (1) 512K x     (1) 512K x       NONE            NONE
                    36             36

     4MB        (1) 1M x 36       NONE           NONE            NONE

     5MB         (1) 256K x    (1) 1M x 36       NONE            NONE
                    36

     6MB         (1) 256K x     (1) 256K x    (1) 1M x 36        NONE
                    36             36

     6MB         (1) 512K x    (1) 1M x 36       NONE            NONE
                    36

     8MB         (1) 256K x     (1) 256K x     (1) 512K x    (1) 1M x 36
                    36             36             36

     8MB         (1) 512K x     (1) 512K x    (1) 1M x 36        NONE
                    36             36

     8MB        (1) 1M x 36    (1) 1M x 36       NONE            NONE

     8MB        (1) 2M x 36       NONE           NONE            NONE

     10MB        (1) 256K x     (1) 256K x    (1) 1M x 36    (1) 1M x 36
                    36             36

     12MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 1M x 36
                    36             36

     12MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     16MB       (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 1M x 36

     16MB       (1) 2M x 36    (1) 2M x 36       NONE            NONE

     16MB       (1) 4M x 36       NONE           NONE            NONE

     17MB        (1) 256K x    (1) 4M x 36       NONE            NONE
                    36

     18MB        (1) 256K x     (1) 256K x    (1) 4M x 36        NONE
                    36             36

     18MB        (1) 512K x    (1) 4M x 36       NONE            NONE
                    36

     20MB        (1) 512K x     (1) 512K x    (1) 4M x 36        NONE
                    36             36

     20MB       (1) 1M x 36    (1) 4M x 36       NONE            NONE

     24MB        (1) 512K x     (1) 512K x    (1) 1M x 36    (1) 4M x 36
                    36             36

     24MB       (1) 1M x 36    (1) 1M x 36    (1) 4M x 36        NONE

     24MB       (1) 2M x 36    (1) 2M x 36    (1) 2M x 36        NONE

                        DRAM CONFIGURATION (CONT.)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     32MB        (1) 2M x 36    (1) 2M x 36    (1) 2M x 36   (1) 2M x 36

     32MB        (1) 4M x 36    (1) 4M x 36       NONE           NONE

     32MB        (1) 8M x 36       NONE           NONE           NONE

     36MB         (1) 512K x     (1) 512K x    (1) 4M x 36   (1) 4M x 36
                     36             36

     36MB        (1) 1M x 36    (1) 4M x 36    (1) 4M x 36       NONE

     36MB        (1) 1M x 36    (1) 8M x 36       NONE           NONE

     40MB        (1) 1M x 36    (1) 1M x 36    (1) 4M x 36   (1) 4M x 36

     40MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36       NONE

     48MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36       NONE

     48MB        (1) 4M x 36    (1) 8M x 36       NONE           NONE

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 4M x 36   (1) 4M x 36

     64MB        (1) 16M x 36      NONE           NONE           NONE

     64MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36       NONE

     64MB        (1) 8M x 36    (1) 8M x 36       NONE           NONE

     65MB         (1) 256K x    (1) 16M x 36      NONE           NONE
                     36

     68MB        (1) 1M x 36    (1) 16M x 36      NONE           NONE

     68MB        (1) 1M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     72MB        (1) 1M x 36    (1) 1M x 36     (1) 16M x        NONE
                                                   36

     72MB        (1) 1M x 36    (1) 1M x 36    (1) 8M x 36   (1) 8M x 36

     80MB        (1) 4M x 36    (1) 16M x 36      NONE           NONE

     80MB        (1) 4M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     96MB        (1) 4M x 36    (1) 4M x 36     (1) 16M x        NONE
                                                   36

     96MB        (1) 4M x 36    (1) 4M x 36    (1) 8M x 36   (1) 8M x 36

     96MB        (1) 8M x 36    (1) 8M x 36    (1) 8M x 36       NONE

     128MB       (1) 16M x 36   (1) 16M x 36      NONE           NONE

     128MB       (1) 8M x 36    (1) 8M x 36    (1) 8M x 36   (1) 8M x 36

                            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

      256KB           (4) 64K x 8          NONE          (1) 16K x 8/(1)
                                                             32K x 8

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

                        CACHE JUMPER CONFIGURATION

    Size          JP1            JP2            JP3             JP4

    64KB          Open           Open           Open            N/A

   128KB         Closed          Open           Open         pins 1 & 2
                                                               closed

   256KB         Closed         Closed          Open         pins 2 & 3
                                                               closed

   256KB         Closed         Closed          Open         pins 1 & 2
                                                               closed

   512KB         Closed         Closed         Closed        pins 1 & 2
                                                               closed

                    CPU TYPE CONFIGURATION

        Type                 JP8                  JP18

       80486SX         pins 2 & 3 closed         Closed

       80487SX               N/A                 Closed

       CX486S                N/A                  Open

       CX486S2               N/A                  Open

       80486DX         pins 1 & 2 closed         Closed

      ODP486SX         pins 1 & 2 closed         Closed

      80486DX2         pins 1 & 2 closed         Closed

      80486DX4               N/A                 Closed

  Pentium Overdrive          N/A                 Closed

                          CPU SPEED CONFIGURATION

     Speed          JP5            JP6            JP7            JP29

     25MHz          Open           Open         Closed           Open

     33MHz         Closed         Closed        Closed           Open

     40MHz          Open          Closed        Closed          Closed

    50iMHz          Open           Open         Closed           Open

     50MHz         Closed          Open          Open           Closed

    66iMHz         Closed         Closed        Closed           Open

  75i (40 x 2)      Open          Closed        Closed          Closed
      MHz

  75i (25 x 3)      Open           Open         Closed           Open
      MHz

   100i (50 x      Closed          Open          Open           Closed
    2) MHz

   100i (33 x      Closed         Closed        Closed           Open
    3) MHz

                    CPU VOLTAGE SELECTION

      Function               JP36                 JP37

      5 Voltage             Closed               Closed

  3.3 Voltage (DX4)          Open                 Open

