CAF TECHNOLOGY, INC.

C426 486DX-33 50/N426 486SX-20 25

Processor         80486SX/80486DX
Processor Speed   20/25/33/50MHz
Chip Set          SIS
Max. Onboard DRAM 32MB
Cache             64/128/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J1       Turbo LED                   J4

  Speaker                     J2       Turbo switch                J5

  Reset switch                J3       Power LED & keylock         J7

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

  »   Keyboard clock select fixed at           JP2           pins 2 & 3
      7.159MHz                                                closed

      Keyboard clock select programmable       JP2           pins 1 & 2
      via BIOS setup                                          closed

  »   CMOS memory normal operation             JP3           pins 1 & 2
                                                              closed

      CMOS memory clear                        JP3           pins 2 & 3
                                                              closed

  »   Monitor type select color                 J6            Closed

      Monitor type select monochrome            J6             Open

  »   Power good signal detect from            JP8           pins 1 & 2
      board                                                   closed

      Power good signal detect from            JP8           pins 2 & 3
      power supply                                            closed

  »   CPU clock speed select ³                 JP16          pins 1 & 2
                                                              closed

      CPU clock speed select < 25Mz            JP16          pins 2 & 3
                                                              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

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

                            CACHE CONFIGURATION

     Size          Bank 0        Bank 1          TAG        Dirty bit U22

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

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

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

                      CACHE JUMPER CONFIGURATION

   Size     JP9     JP10     JP11     JP12     JP13    JP14     JP15

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

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

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

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

       Type               JP5                JP6               JP7

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

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

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