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 |