
INFORMTECH INTERNATIONAL, INC.

IT386

Processor           80386SX
Processor Speed     25/33MHz
Chip Set            TI
Max. Onboard DRAM   16MB (12MB on external memory card)
Cache               32KB
BIOS                Phoenix
Dimensions          318mm x 220mm
I/O Options         Auxiliary keyboard connector, external memory card
                    (IT-FEM386)
NPU Options         80387SX/3167

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  Turbo switch              J8        Power LED & keylock         P5

  Turbo LED                 P2        Auxiliary keyboard          P20
                                      connector

  Speaker                   P3        External battery            P22

  Reset switch              P4        External memory card        SL1

                        USER CONFIGURABLE SETTINGS

              Function                   Jumper/Switch        Position

     Turbo enabled                           J8                Open

      Turbo disabled                          J8               Closed

     AT bus clock speed select               J14            pins 2 & 3
      8MHz                                                     closed

      AT bus clock speed select               J14            pins 1 & 2
      12MHz                                                    closed

     Power good signal detect from           J18            pins 1 & 2
      power supply                                             closed

      Power good signal detect from           J18            pins 2 & 3
      board                                                    closed

     External memory card not                J25            pins 1 & 2
      installed                                                closed

      External memory card                    J25            pins 2 & 3
      installed                                                closed

     80387 disabled (Weitek 3167            SW1/1              Off
      is auto detected)

      80387 enabled (Weitek 3167 is          SW1/1               On
      auto detected)

     Monitor type select                    SW1/2              Off
      monochrome

      Monitor type select                    SW1/2               On
      color/EGA/VGA

       DRAM CONFIGURATION

      Size          Bank 0

      1MB        (4) 256K x 9

      4MB         (4) 1M x 9

                         DRAM JUMPER CONFIGURATION

      Size              J1                 J12                 J13

      1MB            pins 1 & 2         pins 2 & 3      pins 2 & 3 closed
                      closed              closed

      4MB            pins 2 & 3         pins 1 & 2      pins 1 & 2 closed
                      closed              closed

                            CACHE CONFIGURATION

  Note: 32KB cache is factory installed and is not configurable. The
  location is unidentified.

        DRAM SPEED CONFIGURATION

  CPU speed     DRAM speed       J7

    25MHz         120ns        Closed

    25MHz         100ns         Open

    33MHz         100ns        Closed

    33MHz         80ns          Open

                          CPU SPEED CONFIGURATION

   CPU speed     NPU speed       J4          J5          J6         J9

     25MHz         20MHz        2 & 3     1 & 3, 2     2 & 3      2 & 3
                                            & 4

     25MHz         25MHz        2 & 3      2 & 4       1 & 2      2 & 3

     33MHz         25MHz        1 & 2      1 & 2       2 & 3      1 & 2

     33MHz         33MHz        1 & 2       Open       1 & 2      1 & 2

  Note: Pins designated should be in the closed position.

                          I/O MODE CONFIGURATION

    I/O bus       I/O wait      I/O wait state     SW1/3         SW1/4
     mode       state 8-bit         16-bit

      1              4                1              On           On

      2              6                2             Off           On

      3              8                3              On           Off

      4              10               4             Off           Off

                        BATTERY TYPE CONFIGURATION

                 Type                                  J19

                 4.5v                           pins 3 & 4 closed

              3.6 - 4.5v                        pins 1 & 3 closed

     6v (without internal current               pins 1 & 2 closed
          limiting resistor)

  6v (with internal current limiting            pins 2 & 4 closed
              resistor)

