CHAINTECH COMPUTER COMPANY, LTD.

425UXL/433UXL/425UCL/433UCL

Processor        80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed  25/33/40/50(internal)/66(internal)MHz
Chip Set         USAI
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       254mm x 220mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Power LED & keylock         J2       External battery            J7

  Turbo switch                J4       Speaker                    J100

  Turbo LED                   J5       32-bit VESA local bus   SL1 & SL2
                                       slots

  Reset switch                J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Turbo enabled                            J4             Closed

      Turbo disabled                           J4              Open

  »   Factory configured - do not             JMP3             Open
      alter

  »   Factory configured - do not             JMP4             Open
      alter

  »   Factory configured - do not             JMP5             Open
      alter

  »   Factory configured - do not             JMP7             Open
      alter

  »   Factory configured - do not            JMP10             Open
      alter

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      1MB            NONE        (4) 256K x 9

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      4MB            NONE         (4) 1M x 9

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

      16MB        (4) 4M x 9         NONE

      16MB           NONE         (4) 4M x 9

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

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

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

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

                        CACHE JUMPER CONFIGURATION

         Size                     JMP1                     JMP8

         64KB            pins 1 & 2, 4 & 5, 7 &      pins 1 & 2, 4 & 5
                                8 closed                  closed

         128KB           pins 2 & 3, 4 & 5, 8 &      pins 2 & 3, 4 & 5
                                9 closed                  closed

         256KB           pins 2 & 3, 5 & 6, 8 &      pins 2 & 3, 5 & 6
                                9 closed                  closed

          CPU TYPE CONFIGURATION

        Type                 JMP2

       80486SX        pins 1 & 2 closed

      ODP486SX        pins 2 & 3 closed

       80487SX        pins 2 & 3 closed

       80486DX        pins 2 & 3 closed

      80486DX2        pins 2 & 3 closed

                VESA SPEED CONFIGURATION

           Speed                       JMP6

           33MHz             pins 1 & 4, 3 & 6 closed

           40MHz             pins 1 & 4, 2 & 5 closed

           50MHz                 pins 1 & 4 closed