
AUSTIN COMPUTER SYSTEMS

486 LX VESA LOCAL BUS WINSTATION

Processor         80486SX/80487SX/80486DX/80486DX2
Processor Speed   25/33/50(Internal)/50/66(Internal)MHz
Chip Set          SIS
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit VESA local bus slots (2)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Turbo LED                  J3        Reset switch                J6

  Turbo switch               J4        Power LED & keylock         J7

  Speaker                    J5        32-bit VESA local bus    S1 & S2
                                       slots

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     Factory configured do not              JP1                Open
      alter

     Monitor type select color              JP2               Closed

      Monitor type select                    JP2                Open
      monochrome

     Factory configured do not              JP9             Pins 1 & 2
      alter                                                    closed

     Factory configured do not              JP14            Pins 1 & 2
      alter                                                    closed

     Factory configured do not              JP15               Open
      alter

     Factory configured do not              JP16               Open
      alter

     Factory configured do not              JP24            Pins 2 & 3
      alter                                                     open

     Factory configured do not              JP25            Pins 1 & 2
      alter                                                     open

              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

                    CACHE CONFIGURATION

     Size          Cache         Location         TAG

     64KB        (8) 8K x 8    Banks 0 & 1    (1) 8K x 8

     128KB      (4) 32K x 8       Bank 0      (1) 8K x 8

     256KB      (8) 32K x 8    Banks 0 & 1    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

   Size       SR1        SR2       SR3        SR4       SR5        SR6

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

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

   256KB     Pins 2     Pins 2    Pins 2     Pins 2    Pins 2    Pins 2 &
              & 3        & 3       & 3        & 3       & 3         3

  NotePins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

     CPU Type             JP6               JP7                JP8

      80486SX             Open              Open            Pins 2 & 3
                                                              closed

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

      80486DX            Closed          Pins 1 & 2         Pins 1 & 2
                                           closed             closed

     80486DX2            Closed          Pins 1 & 2         Pins 1 & 2
                                           closed             closed

                       CPU SPEED CONFIGURATION

    Speed         JP10          JP11          JP12          JP13

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

    33MHz      Pins 1 & 2    Pins 2 & 3    Pins 1 & 2    Pins 1 & 2

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

    50MHz      Pins 1 & 2    Pins 1 & 2    Pins 1 & 2    Pins 1 & 2

    66iMHz     Pins 1 & 2    Pins 2 & 3    Pins 1 & 2    Pins 1 & 2

  NotePins designated should be in the closed position.

           VESA CPU TYPE (ID0 & ID1) CONFIGURATION

      CPU TYPE            JP24 (ID0)          JP25 (ID1)

        80386          Pins 2 & 3 closed   Pins 1 & 2 closed

        80486          Pins 2 & 3 closed   Pins 1 & 2 closed

             VESA WAIT STATE (ID2) CONFIGURATION

     Wait states          CPU Speed              JP26

    0 wait states           33MHz         Pins 1 & 2 closed

    1 wait state           > 33MHz         Pins 2 & 3 closed

   VESA WAIT STATE (ID2) CONFIGURATION

      CPU Speed              JP27

      <= 33MHz        Pins 1 & 2 closed

       > 33MHz        Pins 2 & 3 closed

