
AMERICAN RESEARCH CORPORATION

286 System

Processor               80286
Processor Speed         8/10MHz
Chip Set                Unknown
Max. Onboard DRAM       1MB
Cache                   None
BIOS                    ARC
Dimensions              330mm x 218mm
I/O Options             EGA port, floppy drive interface, MIPS meter,
                        parallel port, serial ports (2), ST506 hard drive
                        interface
NPU Options             80287

[Image]

                                CONNECTIONS

  Purpose               Location     Purpose                    Location

  Video monitor port       CN1       ST506 hard                   CN7
                                     drive(control)

  Parallel port            CN2       Floppy drive interface       CN8

  Serial port 1            CN3       Speaker                      CN9

  Serial port 2            CN4       Keyboard                     CN10

  ST506 hard drive         CN5       MIPS meter                   CN11
  two(data)

  ST506 hard drive         CN6       External battery             J16
  one(data)

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch        Position

     BIOS type select 27128                 J1                Open

      BIOS type select 27256                 J1               Closed

     DRAM wait states select zero           J2               Closed

      DRAM wait state select one             J2                Open

     Monitor type select EGA                J4              pins 1 & 2
                                                              closed

      Monitor type select CGA or             J4              pins 2 & 3
      monochrome                                              closed

     Serial port COM1 enabled               J5              pins 2 & 3
                                                              closed

      Serial port COM1 disabled              J5              pins 1 & 2
                                                              closed

     Serial port COM2 enabled               J6              pins 2 & 3
                                                              closed

      Serial port COM2 disabled              J6              pins 1 & 2
                                                              closed

     Parallel port LPT1 enabled             J7              pins 2 & 3
                                                              closed

      Parallel port LPT1 disabled            J7              pins 1 & 2
                                                              closed

     Factory configured - do not            J8            pins 1 & 2, 3
      alter                                                 & 4 closed

     Factory configured - do not            J9              pins 1 & 2
      alter                                                   closed

     Monitor port starting address          J11             pins 1 & 2
      select primary                                          closed

      Monitor port starting address          J11             pins 2 & 3
      select secondary                                        closed

     Factory configured - do not            J13               Open
      alter

     Hard drive address select              J14             pins 1 & 3
      primary                                                 closed

      Hard drive address select              J14             pins 1 & 2
      secondary                                               closed

     Floppy drive address select            J14             pins 5 & 6
      primary                                                 closed

      Floppy drive address select            J14             pins 4 & 6
      secondary                                               closed

     Floppy drive type select               J15             pins 1 & 4
      single speed                                             open

      Floppy drive type select dual          J15             pins 1 & 4
      speed                                                   closed

     Floppy drive write                     J15             pins 2 & 3
      precompensation select 125ns                             open

      Floppy drive write                     J15             pins 2 & 3
      precompensation select 187ns                            closed

     CPU speed select switchable            J20             pins 1 & 6
      at turbo switch                                         closed

      CPU speed select switchable            J20             pins 2 & 5
      at keyboard                                             closed

      CPU speed select fast                  J20             pins 3 & 4
                                                              closed

     Monitor type select color              J21             pins 2 & 3
                                                              closed

      Monitor type select                    J21             pins 1 & 2
      monochrome                                              closed

     Factory configured - do not           SW1/7               Off
      alter

     Factory configured - do not           SW1/8               Off
      alter

                         DRAM JUMPER CONFIGURATION

                 Size                                 J17

  512KB (disable memory above 512KB)                 Closed

     1MB (all memory is enabled)                      Open

  Note:The system is factory configured with 1MB installed on-board.

                   NPU SPEED CONFIGURATION

        Speed                J18                  J19

      OSC Y1/3               N/A           pins 2 & 3 closed

       5.3MHz          pins 2 & 3 closed   pins 1 & 2 closed

        8MHz           pins 1 & 2 closed   pins 1 & 2 closed

   SINGLE MONITOR SYSTEM SWITCH CONFIGURATION (PRIMARY MONITOR CONNECTED
                                  AT CN1)

     Monitor Type         SW1/1        SW1/2        SW1/3        SW1/4

      Monochrome           Off          Off          On           Off

     CGA 40 x 25           On           Off          Off          On

     CGA 80 x 25           Off          Off          Off          On

  EGA Low Resolution       On           On           On           Off

  EGA High Resolution      Off          On           On           Off

   DUAL MONITOR SYSTEM SWITCH CONFIGURATION (PRIMARY MONITOR CONNECTED AT
                                   CN1)

    Primary        Secondary      SW1/1     SW1/2      SW1/3      SW1/4

   Monochrome     CGA 40 x 25      On        Off         On        Off

   Monochrome     CGA 80 x 25      Off       Off         On        Off

  CGA 40 x 25     Monochrome       On        Off        Off         On

  CGA 80 x 25     Monochrome       Off       Off        Off         On

  EGA Low Res     Monochrome       On         On         On        Off

  EGA High Res    Monochrome       Off        On         On        Off

   DUAL MONITOR SYSTEM SWITCH CONFIGURATION (SECONDARY MONITOR CONNECTED
                                  AT CN1)

    Primary        Secondary      SW1/1     SW1/2      SW1/3      SW1/4

  CGA 40 x 25     Monochrome       On         On        Off         On

  CGA 80 x 25     Monochrome       Off        On        Off         On

   Monochrome     CGA 40 x 25      On         On         On         On

   Monochrome     CGA 80 x 25      Off        On         On         On

   Monochrome     EGA Low Res      On        Off         On         On

   Monochrome     EGA High Res     Off       Off         On         On

                  PRIMARY MONITOR POWER-ON CONFIGURATION

     Monitor Type       Mode at Power-On        SW1/5           SW1/6

  Monochrome/CGA/EGA      MDA/Hercules           Off             On

       CGA/EGA                 CGA                On             Off

         EGA                   EGA                On             On

                        MONITOR MODE CONFIGURATION

               Setting                       J10                J12

   Switchable by software using the       pins 2 & 3         pins 2 & 3
         utility AUTOMODE.COM               closed            closed

     CGA/EGA (AUTOMODE.COM utility        pins 1 & 2         pins 1 & 2
           cannot be used)                  closed            closed

