
AUSTIN COMPUTER SYSTEMS

486/DX2 33i/50i(TC-4)

Processor         80486DX/80486DX2
Processor Speed   25/33/50(internal)/66(internal)MHz
Chip Set          C & T
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       32-bit external memory card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     JP7      Turbo LED                  JP10

  Power LED & keylock         JP8      Turbo switch               JP11

  Reset switch                JP9      External battery            JP2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not alter        J3              N/A

     Factory configured - do not alter        J4              N/A

     CMOS memory normal operation             JP3          pins 1 & 2
                                                              closed

      CMOS memory clear                        JP3          pins 2 & 3
                                                              closed

     Monitor type select color                JP4          pins 1 & 2
                                                              closed

      Monitor type select monochrome           JP4          pins 2 & 3
                                                              closed

     Factory configured - do not alter        JP5             N/A

     DRAM type select identical               JP6          pins 1 & 2
                                                              closed

      DRAM type select mixed                   JP6          pins 2 & 3
                                                              closed

     Factory configured - do not alter       JP12             N/A

     Factory configured - do not alter       JP13             N/A

     Factory configured - do not alter       JP15             N/A

     Factory configured - do not alter       JP16             N/A

      Note : The location of J3 is unidentified.

              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

      5MB         (4) 256K x 9    (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

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

                           CACHE CONFIGURATION

     Size          Bank 0         Bank 1         TAG 1          TAG 2

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

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

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

                        CACHE JUMPER CONFIGURATION

  Size    SR1  SR2   SR3   SR4   SR5   SR6   SR7   SR8   SR9  SR10   SR11

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

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

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

  Note: Pins designated should be in the closed position.

       BATTERY CONFIGURATION

    Type        JP1        JP2

  Internal    Closed       Open

  External     Open       Closed

