INFORMTECH INTERNATIONAL, INC.

IT486SQ

Processor        80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed  20/25/33/50(internal)/66(internal)MHz
Chip Set         OPTI
Max. Onboard DRAM32MB
Cache            None
BIOS             Phoenix
Dimensions       330mm x 218mm
I/O Options      None
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                    Location   Purpose                  Location

  External battery             J1       Turbo LED                  J5

  Keyboard connector           J2A      Power LED & keylock        J19

  Reset switch                 J3       Speaker                    J20

  Turbo switch                 J4

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select - CGA, EGA,         JP2             Closed
      VGA

      Monitor type select - monochrome        JP2              Open

  »   I/O recovery time enabled               JP13          pins 2 & 3
                                                              closed

      I/O recovery time disabled              JP13          pins 1 & 2
                                                              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

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

                          CPU TYPE CONFIGURATION

     CPU Type             JP9               JP10              JP11

      80486SX          pins 1 & 2           Open              Open
                         closed

      80486DX          pins 2 & 3          Closed           pins 2 & 3
                         closed                              closed

        P24            pins 2 & 3          Closed           pins 1 & 2
                         closed                              closed

                        SYSTEM CLOCK CONFIGURATION

              System Clock                             JP5

                 20MHz                          pins 1 & 2 closed

     Half of alternative oscillator             pins 2 & 3 closed
           frequency at OSC3

             UPGRADE PROCESSOR TYPE CONFIGURATION

  Upgrade processor           JP6                  JP7

       80486DX         pins 2 & 3 closed    pins 2 & 3 closed

  80487SX or other     pins 1 & 2 closed    pins 1 & 2 closed

               EXTERNAL BATTERY CONFIGURATION

         Battery type                      JP3

   3.6V Lithium battery **          pins 1 & 2 closed

    4.5V Alkaline Battery           pins 2 & 4 closed

    6V (4 AA) Battery pack          pins 3 & 4 closed

      6V Battery pack **            pins 1 & 3 closed

  Note:** with internal series current limiting resistor.