AUSTIN COMPUTER SYSTEMS

486 EISA SI-6

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   33/50/66(internal)MHz
Chip Set          SIS
Max. Onboard DRAM 32MB (128MB with BIOS upgrade)
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  Power LED & keylock          J1       Turbo switch               J4

  Speaker                      J2       Turbo LED                  J5

  Reset switch                 J3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not alter        JP9           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter       JP21           pins 1 & 2
                                                              closed

  »   Burst mode select enabled               JP23            Closed

      Burst mode select disabled              JP23             Open

  »   Monitor type select color               JP24             Open

      Monitor type select monochrome          JP24            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

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

          16MB                  (4) 4M x 9                  None

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

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

          64MB                 (4) 16M x 9                  None

          128MB                (4) 16M x 9              (4) 16M x 9

  Note : The main board will only accept 16M x 9 SIMMs if the BIOS
  upgrade is installed.

                         CACHE CONFIGURATION

         Size                  Bank 0                 Bank 1

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

         128KB              (4) 32K x 8                NONE

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

  Note : Tag chips are factory installed and are not configurable.

                  CACHE JUMPER CONFIGURATION

  Size      JP1     JP2      JP3      JP4      JP12    JP13

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

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

  256KB    4 & 5   2 & 3    2 & 3    2 & 3    2 & 3    2 & 3

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type               JP5                JP7               JP15

      80486SX          pins 2 & 3         pins 2 & 3           Open
                         closed            closed

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

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

                  BATTERY TYPE CONFIGURATION

        Type                 JP10                 JP11

       DS1287          pins 1 & 2 closed   pins 1 & 2 closed

       DS1488          pins 2 & 3 closed   pins 2 & 3 closed