PC CALC, INC.
AT-TURBO 286 1800
Processor |
80286 |
Processor Speed |
15MHz |
Chip Set |
None |
Max. Onboard DRAM |
1MB |
Cache |
None |
BIOS |
Phoenix |
Dimensions |
355mm x 304mm |
I/O Options |
None |
NPU Options |
80287 |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
Speaker |
J19 |
Turbo switch |
J25 |
Power LED & keylock |
J20 |
Turbo LED |
J27 |
Reset switch |
J24 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
» |
DRAM select 1 wait state |
E1 |
Open |
DRAM select 0 wait states |
E1 |
Closed | |
» |
NPU speed select high |
J29 |
pins 1 & 2 closed |
NPU speed select low |
J29 |
pins 2 & 3 closed | |
» |
Monitor type select color |
SW1 |
Closed |
Monitor type select monochrome |
SW1 |
Open | |
» |
BIOS type select 27128 |
U57 |
pins 1 & 8, 2 & 7 closed |
BIOS type select 27256 |
U57 |
pins 3 & 6, 4 & 5 closed |
DRAM CONFIGURATION | ||
Size |
Bank 0 |
Bank 1 |
512KB |
(18) 41256 |
NONE |
640KB |
(18) 41256 |
(18) 4164 |
1MB |
(18) 41256 |
(18) 41256 |
DRAM JUMPER CONFIGURATION | ||
Size |
J17 |
J18 |
512KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
640KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
1MB (640KB base/384KB extended) |
pins 1 & 2 closed |
pins 1 & 2 closed |
1MB (512KB base/512KB extended) |
pins 1 & 2 closed |
pins 2 & 3 closed |
EXTERNAL BATTERY CONFIGURATION | ||
Size |
J22 |
J31 |
Lithium |
Closed |
Open |
Rechargeable |
Closed |
Closed |