
ADVANCED INTEGRATION RESEARCH, INC.

486MIS REV. 1.11

Processor      80486SX/80487SX/80486DX/80486DX2/ODP486SX/Pentium Overdrive
Processor      20/25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set       SIS
Max. Onboard   64MB
DRAM
Cache          64/128/256/512KB
BIOS           AMI
Dimensions     330mm x 218mm
I/O Options    32-bit VESA local bus slots (2), floppy drive interface,

               IDE interface, parallel port, serial ports (2)
NPU Options    None

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  32-bit VESA Local       J1 & J2     Turbo switch                 S6
  bus slots

  Turbo LED                  S1       IDE interface               S10

  Reset switch               S2       Floppy drive interface      S11

  Hard drive LED             S3       Parallel port               S12

  Speaker                    S4       Serial port 1               S13

  Power LED & keylock        S5       Serial port 2               S14

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not alter        JP6            Closed

     Monitor type select monochrome,         JP16             Open
      VGA or EGA

      Monitor type select CGA                 JP16            Closed

     IDE interface enabled                   JP17             Open

      IDE interface disabled                  JP17            Closed

     Factory configured - do not alter       JP18            Closed

     Parallel port select interrupt          JP22           pins 1 & 2
      IRQ7                                                    closed

      Parallel port select interrupt          JP22           pins 2 & 3
      IRQ5                                                    closed

     Factory configured - do not alter       JP27            Closed

     Flash BIOS write protect disabled       JP28           pins 1 & 2
                                                              closed

      Flash BIOS write protect enabled        JP28           pins 2 & 3
                                                              closed

     Factory configured - do not alter       JP31            Closed

     Normal password operation               JP32             Open

      BIOS password clear                     JP32            Closed

                       DRAM CONFIGURATION

     Size          Bank 0          Bank 1           Bank 2

     2MB        (1) 512K x 36       None             None

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

     4MB        (1) 1M x 36         None             None

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

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

     8MB        (1) 2M x 36         None             None

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

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

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

     16MB       (1) 4M x 36         None             None

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

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

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

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

     40MB       (1) 1M x 36      (1) 1M x 36     (1) 8M x 36

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

     48MB       (1) 4M x 36      (1) 4M x 36     (1) 4M x 36

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

     64MB       (1) 4M x 36      (1) 4M x 36     (1) 8M x 36

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

                      CACHE SIZE JUMPER CONFIGURATION

  Size     JP7   JP8    JP9    JP10   JP11    JP12   JP13    JP14   JP15

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

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

  256KB    2 &   1 &    2 &    2 &     2 &    2 &     2 &     1 &   2 & 3
           3      2     3       3      3       3      3       2

  256KB    2 &   2 &    2 &    2 &     2 &    1 &     2 &     2 &   1 & 2
           3      3     3       3      3       2      3       3

  Note:Pins designated should be in the closed position.

                       CACHE SIZE AND SRAM LOCATIONS

   Cache Size         Bank 0           Bank 1         TAG      Dirty Bit

      64KB          (4) 8K x 8      (4 ) 8K x 8     (1) 8K x    (1) 16K x
                                                       8           1

     128KB         (4) 32K x 8          None         (1) 32K    (1) 16K x
                                                      x 8          1

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

     512KB         (4) 128K x 8         None         (1) 32K    (1) 16K x
                                                      x 8          4

          CPU EXTERNALCLOCK SPEED

   Speed      JP3        JP4        JP5

   20MHz      Open      Closed    Closed

   25MHz     Closed      Open     Closed

   33MHz     Closed     Closed     Open

   40MHz      Open       Open     Closed

  50i MHz    Closed      Open     Closed

   50MHz      Open      Closed     Open

  66i MHz    Closed     Closed     Open

                                 CPU TYPE

        Type                     JP1                       JP2

       80486SX                  Open                pins 2 & 3 closed

       80487SX            pins 2 & 3 closed        pins 1 & 2 and 3 & 4
                                                          closed

       80486DX            pins 1 & 2 closed        pins 1 & 2 and 3 & 4
                                                          closed

      ODP486SX            pins 2 & 3 closed        pins 1 & 2 and 3 & 4
                                                          closed

      80486DX2            pins 1 & 2 closed        pins 1 & 2 and 3 & 4
                                                          closed

  Pentium Overdrive       pins 1 & 2 closed        pins 1 & 2 and 3 & 4
                                                          closed

                             IDE RECOVERY TIME

             Time                      JP29                  JP30

              300ns                  Closed                Closed

               240ns                   Open                 Closed

               180ns                  Closed                 Open

               120ns                   Open                  Open

                       SCSI ADDRESS

      Address          W1/pins 3 & 4       W1/pins 5 & 6

   DC000h enabled         Closed              Closed

  DC000h disabled         Closed                N/A

  DC8000h enabled           N/A               Closed

  DC8000h disabled        Closed              Closed

                          SCSI PORT CONFIGURATION

       Setting          IRQ       W1/1 & 2      W1/7 & 8      W1/9 & 10

        Enabled         11        Closed        Closed          Open

        Disabled         10         Open          Open          Closed

