
ASUS COMPUTER INTERNATIONAL

VL/I-486SV2G (REV. 1.0)

VL/I-486SV2GX4 (REV. 1.0)

Processor  CX486S/80486SX/SL80486SX/486 Overdrive/SL486 Overdrive/
           80487SX/CX486DX/80486DX/SL80486DX/80486DX2/SL80486DX2/CX486DX2/80486DX4/P24T
Processor  20/25/33/40/50(internal)/50/66(internal)/75(internal)/
Speed
           100(internal)MHz
Chip Set   SIS
Video Chip None
Set
Maximum    64MB
Onboard
Memory
Maximum    None
Video
Memory
Cache      128/256/512/1024KB
BIOS       Award
Dimensions 254mm x 218mm
I/O        32-bit VESA local bus slots (2), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Power LED & keylock        J1       Green PC connector          JP2

  Speaker                    J2       Green PC connector          JP3

  Reset switch               J3       Green PC connector          JP4

  Turbo LED                  J4       Green PC connector          JP28

  Turbo switch               J5       32-bit VESA local bus    SL1 & SL2
                                      slots

  External battery           J6

                        USER CONFIGURABLE SETTINGS

                Function                    Label          Position

      Battery type select internal           JP1       Pins 1 & 2 closed

      Battery type select external           JP1       Pins 2 & 3 closed

     IRQ12 enabled                          JP7       Pins 1 & 2 closed

      IRQ12 disabled                         JP7       Pins 2 & 3 closed

     Factory configured - do not            JP8         Unidentified
      alter

      Monitor type select                    JP9       Pins 1 & 2 closed
      monochrome/VGA

      Monitor type select CGA                JP9       Pins 2 & 3 closed

      Green PC enabled (JP28)               JP10       Pins 2 & 3 closed

      Green PC disabled (RC control)        JP10       Pins 1 & 2 closed

     VESA clock delay enabled              JP24       Pins 1 & 2 closed

      VESA clock delay disabled             JP24       Pins 2 & 3 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) 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        None        (1) 1M x 36       None
                    36

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

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

     10MB        (1) 256K x     (1) 256K x     (1) 2M x 36       None
                    36              36

     10MB        (1) 512K x        None        (1) 1M x 36   (1) 1M x 36
                    36

     10MB        (1) 512K x        None        (1) 2M x 36       None
                    36

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

     12MB       (1) 2M x 36        None        (1) 1M x 36       None

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

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

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0          Bank 1         Bank 2         Bank 3

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

     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        None        (1) 4M x 36       None
                    36

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

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

     24MB       (1) 2M x 36        None        (1) 4M x 36       None

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

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

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

     40MB       (1) 2M x 36        None        (1) 4M x 36   (1) 4M x 36

     40MB       (1) 2M x 36        None        (1) 8M x 36       None

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

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

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

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

  Note: The location of banks 0, 1, 2, & 3 are unidentified.

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

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

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

   256KB (B)      (4) 64K x 8        None        (1) 32K x 8

   512KB (A)      (4) 64K x 8     (4) 64K x 8    (1) 32K x 8

   512KB (B)     (4) 128K x 8        None        (1) 32K x 8

      1MB        (4) 128K x 8    (4) 128K x 8    (1) 128K x 8

                        CACHE JUMPER CONFIGURATION

      Size              JP13               JP14               JP25

      128KB             Open            Pins 2 & 3      Pins 1 & 2 closed
                                          closed

    256KB (A)           Open            Pins 1 & 2      Pins 1 & 2 closed
                                          closed

    256KB (B)         Pins 1 & 2        Pins 2 & 3      Pins 1 & 2 closed
                       closed             closed

    512KB (A)         Pins 4 & 5        Pins 1 & 2      Pins 2 & 3 closed
                       closed             closed

    512KB (B)         Pins 1 & 2        Pins 2 & 3      Pins 2 & 3 closed
                       closed             closed

       1MB            Pins 2 & 3        Pins 1 & 2      Pins 2 & 3 closed
                       closed             closed

                            CPU SPEED SELECTION

      Speed              JP21               JP22               JP23

      20MHz            Pins 1 & 2        Pins 1 & 2         Pins 1 & 2
                        closed             closed             closed

      25MHz            Pins 2 & 3        Pins 1 & 2         Pins 1 & 2
                        closed             closed             closed

      33MHz            Pins 2 & 3        Pins 2 & 3         Pins 2 & 3
                        closed             closed             closed

      40MHz            Pins 2 & 3        Pins 2 & 3         Pins 1 & 2
                        closed             closed             closed

      50iMHz           Pins 2 & 3        Pins 1 & 2         Pins 1 & 2
                        closed             closed             closed

      50MHz            Pins 1 & 2        Pins 1 & 2         Pins 2 & 3
                        closed             closed             closed

      66iMHz           Pins 2 & 3        Pins 2 & 3         Pins 2 & 3
                        closed             closed             closed

      75iMHz           Pins 2 & 3        Pins 1 & 2         Pins 1 & 2
                        closed             closed             closed

     100iMHz           Pins 2 & 3        Pins 2 & 3         Pins 2 & 3
                        closed             closed             closed

                            CPU TYPE SELECTION

       Type          JP16       JP17       JP18        JP19       JP20

      CX468S        2 & 3, 4    1 & 2     1 & 2, 3    2 & 3       2 & 3
                      & 5                   & 4

     80486SX         Open       Open       Open       2 & 3       2 & 3

    SL80486SX       3 & 4, 5    Open       4 & 5      2 & 3       2 & 3
                      & 6

  486 Overdrive      Open       Open       Open       1 & 2       2 & 3

  SL486 Overdrive    5 & 6      Open       4 & 5      1 & 2       2 & 3

     80487SX         Open       Open       Open       1 & 2       2 & 3

     CX486DX        2 & 3, 4    1 & 2     1 & 2, 3    1 & 2       2 & 3
                      & 5                   & 4

     80486DX         Open       Open       Open       1 & 2       2 & 3

    SL80486DX       3 & 4, 5    Open       4 & 5      1 & 2       2 & 3
                      & 6

     80486DX2        Open       Open       Open       1 & 2       2 & 3

    SL80486DX2      3 & 4, 5    Open       4 & 5      1 & 2       2 & 3
                      & 6

     CX486DX2       2 & 3, 4    1 & 2     1 & 2, 3   1 & 2, 4     2 & 3
                      & 5                   & 4        & 5

  80486DX4 (2x)     3 & 4, 5    5 & 6      4 & 5      1 & 2       2 & 3
                      & 6

  80486DX4 (2.5x)   3 & 4, 5    4 & 5      4 & 5      1 & 2       2 & 3
                      & 6

  80486DX4 (3x)     3 & 4, 5    Open       4 & 5      1 & 2       2 & 3
                      & 6

       P24T          5 & 6      Open       4 & 5      1 & 2       1 & 2

  Note: Pins designated should be in the closed position.

            CPU TYPE SELECTION

        Type                 JP11

        Cyrix         Pins 1 & 2 closed

        Intel         Pins 2 & 3 closed

                 CPU HARDWARE TRAP SELECTION

        Type                 JP5                  JP6

       CX468S          Pins 2 & 3 closed   Pins 1 & 2 closed

       80486SX         Pins 1 & 2 closed   Pins 2 & 3 closed

      SL80486SX        Pins 1 & 2 closed   Pins 2 & 3 closed

       CX486DX         Pins 2 & 3 closed   Pins 1 & 2 closed

       80486DX         Pins 1 & 2 closed   Pins 2 & 3 closed

      SL80486DX        Pins 1 & 2 closed   Pins 2 & 3 closed

      80486DX2         Pins 1 & 2 closed   Pins 2 & 3 closed

     SL80486DX2        Pins 1 & 2 closed   Pins 2 & 3 closed

      CX486DX2         Pins 2 & 3 closed   Pins 1 & 2 closed

      80486DX4         Pins 1 & 2 closed   Pins 2 & 3 closed

        P24T           Pins 1 & 2 closed   Pins 1 & 2 closed

                    CPU VOLTAGE SELECTION

       Voltage               JP12                 JP15

         3v            Pins 2 & 3 closed   Pins 2 & 3 closed

         5v            Pins 1 & 2 closed   Pins 1 & 2 closed

       VL BUS WAIT STATE SELECTION

       Setting               JP26

          0           Pins 1 & 2 closed

          1           Pins 2 & 3 closed

          VL BUS SPEED SELECTION

        Speed                JP27

      <= 33MHz        Pins 1 & 2 closed

       >33 MHz        Pins 2 & 3 closed

