
INFORMTECH INTERNATIONAL, INC.

286/SUPRA (MODEL B)

Processor             80286
Processor Speed       6/8/10/12/16/20MHz
Chip Set              C & T
Max. Onboard DRAM     4MB
SRAM Cache            None
BIOS                  Award
Dimensions            330mm x 218mm
I/O Options           16-bit external memory card slot, auxillary keyboard
                      connector
NPU Options           80287

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Auxiliary keyboard          J9       Power LED & keylock         P5

  Turbo LED                   P2       External battery            P8

  Speaker                     P3       16-bit external             S1
                                       memory card

  Reset switch                P4

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

      BIOS type select 27256                 J4              pins 2 & 3
                                                               closed

      BIOS type select 27128                 J4              pins 1 & 2
                                                               closed

     Keyboard controller clock              J5              pins 1 & 2
      speed select 6MHz                                        closed

      Keyboard controller clock              J5              pins 2 & 3
      speed select 12MHz                                       closed

      Battery type select Alkaline           J7                closed
      4.5VDC

      Battery type select Lithium            J7                 open
      6VDC

     Power good signal detect               J8              pins 2 & 3
      from power supply                                        closed

      Power good signal detect               J8              pins 1 & 2
      from board                                               closed

      Monitor type select color         SW1/Switch 3           closed

      Monitor type select               SW1/Switch 3            open
      monochrome

                     CPU SPEED/BUS CLOCK CONFIGURATION

  CPU Speed     AT Bus      J2         J3       J10       J13       J14
                Speed

   20MHz        8MHz       pins 1    pins 1    pins 2     open     open
                            & 2       & 2       & 3

   20MHz        10MHz       N/A      pins 1    pins 2    closed    open
                                      & 2       & 3

   20MHz        12MHz      pins 2    pins 1    pins 2     open     open
                            & 3       & 2       & 3

   16MHz        8MHz       pins 1    pins 1    pins 1     open     open
                            & 2       & 2       & 2

   16MHz        12MHz      pins 2    pins 1    pins 1     open     open
                            & 3       & 2       & 2

   12MHz        6MHz        N/A      pins 2     N/A      closed    open
                                      & 3

   12MHz        8MHz       pins 1    pins 2     N/A       open     open
                            & 2       & 3

   12MHz        12MHz      pins 2     N/A       N/A       open    closed
                            & 3

   10MHz        10MHz       N/A      pins 1    pins 2    closed   closed
                                      & 2       & 3

    8MHz        8MHz       pins 1     N/A       N/A       open    closed
                            & 2

    6MHz        6MHz        N/A      pins 2     N/A      closed   closed
                                      & 3

  Note:Pins designated should be in the closed position.

                 NPU CLOCK RATE CONFIGUARATION

   NPU Speed      Clock Rate     SW1/Switch 1    SW1/Switch 2

    80287-8          6MHz           closed          closed

    80287-8          8MHz           closed           open

    80287-10         10MHz           open           closed

    80287-12         12MHz           open            open

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1          J11             J12

     512KB       (2) 256K x       NONE           open           open
                     9

      1MB        (2) 256K x    (2) 256K x       closed          open
                     9             9

      2MB        (2) 1M x 9       NONE           open          closed

      4MB        (2) 1M x 9    (2) 1M x 9       closed         closed

