CHAINTECH COMPUTER COMPANY, LTD.

486SCSL/486SCSI

Processor        CX486S/CX486S & CX487S/80486SX/80487SX/AMD486DX/80486DX/

                 ODP486SX/ 80486DX2
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         SIS
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       265mm x 220mm
I/O Options      32-bit VESA local bus slots (2) (486SCSL only)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  External battery            J1       Power LED & keylock         J5

  Turbo LED                   J2       Reset switch                J6

  Turbo switch                J3       32-bit VESA local bus   SL1 & SL2
                                       slots

  Speaker                     J4

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

  »   Turbo switch select low                 J3               Open

      Turbo switch select high                J3              Closed

  »   CMOS memory normal operation           JP12           Pins 1 & 2
                                                              closed

      CMOS memory clear                      JP12           Pins 2 & 3
                                                              closed

  »   PQFP CPU disabled                      JP16             Closed

      PQFP CPU enabled                       JP16              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             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) 16K x 8 or
                                                           (1) 32K x 8

                      CACHE JUMPER CONFIGURATION

   Size     JP1      JP2      JP3     JP4      JP5      JP6      JP7

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

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

  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               JP13               JP14              JP15

      CX486S              Open            Pins 2 & 3           Open
                                            closed

  CX486S & CX487S       Pins 1 & 2        Pins 1 & 2          Closed
                         closed             closed

  80486SX (PQFP)          Open            Pins 2 & 3           Open
                                            closed

   80486SX (PGA)          Open            Pins 2 & 3           Open
                                            closed

     ODP486SX           Pins 2 & 3        Pins 1 & 2          Closed
                         closed             closed

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

     AMD486DX           Pins 1 & 2        Pins 1 & 2          Closed
                         closed             closed

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

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

         CPU SPEED CONFIGURATION

  Speed      JP20      JP21      JP22

  25MHz     Closed     Open      Open

  33MHz      Open      Open     Closed

  40MHz      Open     Closed    Closed

  50iMHz    Closed     Open      Open

  50MHz      Open     Closed     Open

  66iMHz     Open      Open     Closed

  VESA WAIT STATE CONFIGURATION (SCSL ONLY)

      Wait states              JP9/11

     0 wait states        Pins 1 & 2 closed

     1 wait state         Pins 2 & 3 closed

   BUS SPEED CONFIGURATION (SCSL ONLY)

      CPU speed             JP8/10

      <= 33MHz        Pins 1 & 2 closed

       > 33MHz        Pins 2 & 3 closed