
ADVANCED INTEGRATED RESEARCH, INC.

486SH REV. 1.1

Processor        80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  20/25/33/40/50(Internal)/50/66(Internal)MHz
Chip Set         SIS
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      32-bit VESA local bus slots (3)

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                Location

  External battery           J1        Turbo switch              J5

  Power LED & keylock        J2        Turbo LED                 J6

  Speaker                    J3        32-bit VESA Local     S1, S2, & S3
                                       bus slots

  Reset switch               J4

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome,          JP7             Open
      VGA or EGA

      Monitor type select CGA                  JP7            Closed

     CMOS memory normal operation            JP10           pins 1 & 2
                                                              closed

      CMOS memory clear                       JP10           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 x9         NONE

     8MB        (4) 1M x9       (4) 1M x9

    16MB        (4) 4M x 9        NONE

    20MB        (4) 1M x9      (4) 4M x 9

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

                     CACHE CONFIGURATION

      Size          Bank 0          Bank 1        TAG/U36

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

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

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

                        CACHE JUMPER CONFIGURATION

   Size         JP1         JP2          JP3         JP20         JP21

   64KB       pins 1 &    pins 2 &     pins 1 &     pins 1 &   pins 1 & 2
                 2           3            2            2

   128KB      pins 1 &    pins 1 &     pins 2 &     pins 1 &   pins 2 & 3
                 2           2            3            2

   256KB      pins 2 &    pins 2 &     pins 2 &     pins 2 &   pins 2 & 3
                 3           3            3            3

  Note:Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type            JP15           JP16          JP18         JP19

   486SX (PGA)       pins 2 & 3       Open          Open        Closed
                      closed

  80486SX (PQFP)     pins 2 & 3       Open          Open         Open
                      closed

     80487SX         pins 1 & 2    pins 2 & 3      Closed       Closed
                      closed         closed

     80486DX         pins 1 & 2    pins 1 & 2      Closed       Closed
                      closed         closed

     ODP486SX        pins 1 & 2    pins 2 & 3      Closed       Closed
                      closed         closed

     80486DX2        pins 1 & 2    pins 1 & 2      Closed       Closed
                      closed         closed

      Pentium        pins 1 & 2    pins 1 & 2      Closed       Closed
    Overdrive         closed         closed

                          CPU SPEED CONFIGURATION

    Speed          JP5            JP11          JP12            JP14

    20MHz          Open           Open         Closed         pins 1 & 2
                                                               closed

    25MHz         Closed         Closed         Open          pins 1 & 2
                                                               closed

    33MHz         Closed          Open          Open          pins 1 & 2
                                                               closed

    40MHz          Open          Closed         Open          pins 2 & 3
                                                               closed

   50i MHz        Closed         Closed         Open          pins 1 & 2
                                                               closed

    50MHz          Open           Open          Open          pins 2 & 3
                                                               closed

   66i MHz        Closed          Open          Open          pins 1 & 2
                                                               closed

