INFORMTECH INTERNATIONAL, INC.

IT486SR

Processor        80486SX/80486DX/80486DX2
Processor Speed  20/25/33/50(internal)/50/66(internal)MHz
Chip Set         UMC
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      None
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J9       Turbo switch              JP10

  Speaker                     J18       Turbo LED                 JP11

  Power LED & keylock         J19       Reset switch               SW1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP1           pins 1 & 2
                                                              closed

  »   Monitor type select monochrome          JP2              Open

      Monitor type select color               JP2             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

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

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

      16MB        (4) 4M x 9         NONE

      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 (U35 & U40)

       64KB            (4) 8K x 8        (4) 8K x 8        (2) 16K x 4

       128KB          (4) 32K x 8           NONE           (2) 16K x 4

       256KB          (4) 32K x 8        (4) 32K x 8       (2) 16K x 4

                     CACHE JUMPER CONFIGURATION

   Size      JP3      JP5       JP6       JP7      JP8       JP9

   64KB     2 & 3     Open     Open      Open      Open      Open

  128KB     1 & 2     Open     Open      Closed   Closed    Closed

  256KB     2 & 3    Closed    Closed    Closed   Closed    Closed

  Note: Pins designated should be in the closed position.

                          CPU TYPE CONFIGURATION

        Type                JP12              JP13              JP14

       80486SX           pins 2 & 3           Open             Closed
                           closed

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

     80486DX/DX2         pins 1 & 2        pins 1 & 2          Closed
                           closed            closed

         CPU SPEED CONFIGURATION

        Speed                JP4

        20MHz         pins 1 & 2 closed

        25MHz         pins 1 & 2 closed

        33MHz         pins 1 & 2 closed

       50iMHz         pins 1 & 2 closed

        50MHz         pins 2 & 3 closed

       66iMHz         pins 1 & 2 closed