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  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Video monitor port  | 
 CN1  | 
 ST506 hard drive(control)  | 
 CN7  | 
| 
 Parallel port  | 
 CN2  | 
 Floppy drive interface  | 
 CN8  | 
| 
 Serial port 1  | 
 CN3  | 
 Speaker  | 
 CN9  | 
| 
 Serial port 2  | 
 CN4  | 
 Keyboard  | 
 CN10  | 
| 
 ST506 hard drive two(data)  | 
 CN5  | 
 MIPS meter  | 
 CN11  | 
| 
 ST506 hard drive one(data)  | 
 CN6  | 
 External battery  | 
 J16  | 
| 
 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 monochrome  | 
 J4  | 
 pins 2 & 3 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 alter  | 
 J8  | 
 pins 1 & 2, 3 & 4 closed  | 
| » | 
 Factory configured - do not alter  | 
 J9  | 
 pins 1 & 2 closed  | 
| » | 
 Monitor port starting address select primary  | 
 J11  | 
 pins 1 & 2 closed  | 
| 
 Monitor port starting address select secondary  | 
 J11  | 
 pins 2 & 3 closed  | |
| » | 
 Factory configured - do not alter  | 
 J13  | 
 Open  | 
| » | 
 Hard drive address select primary  | 
 J14  | 
 pins 1 & 3 closed  | 
| 
 Hard drive address select secondary  | 
 J14  | 
 pins 1 & 2 closed  | |
| » | 
 Floppy drive address select primary  | 
 J14  | 
 pins 5 & 6 closed  | 
| 
 Floppy drive address select secondary  | 
 J14  | 
 pins 4 & 6 closed  | |
| » | 
 Floppy drive type select single speed  | 
 J15  | 
 pins 1 & 4 open  | 
| 
 Floppy drive type select dual speed  | 
 J15  | 
 pins 1 & 4 closed  | |
| » | 
 Floppy drive write precompensation select 125ns  | 
 J15  | 
 pins 2 & 3 open  | 
| 
 Floppy drive write precompensation select 187ns  | 
 J15  | 
 pins 2 & 3 closed  | |
| » | 
 CPU speed select switchable at turbo switch  | 
 J20  | 
 pins 1 & 6 closed  | 
| 
 CPU speed select switchable at keyboard  | 
 J20  | 
 pins 2 & 5 closed  | |
| 
 CPU speed select fast  | 
 J20  | 
 pins 3 & 4 closed  | |
| » | 
 Monitor type select color  | 
 J21  | 
 pins 2 & 3 closed  | 
| 
 Monitor type select monochrome  | 
 J21  | 
 pins 1 & 2 closed  | |
| » | 
 Factory configured - do not alter  | 
 SW1/7  | 
 Off  | 
| » | 
 Factory configured - do not alter  | 
 SW1/8  | 
 Off  | 
| 
 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 utility AUTOMODE.COM  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 CGA/EGA (AUTOMODE.COM utility cannot be used)  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  |