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