JPN CORPORATION
AT 286
|
Processor |
80286 |
|
Processor Speed |
12/16/25MHz |
|
Chip Set |
ACT |
|
Max. Onboard DRAM |
4MB |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
305mm x 222mm |
|
I/O Options |
None |
|
NPU Options |
80287 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Turbo LED |
JP2 |
External battery |
JP11 |
|
Power LED & keylock |
JP7 |
Speaker |
JP14 |
|
Reset switch |
JP10 |
Turbo switch |
JP19 |
|
USER CONFIGURABLE JUMPERS | |||
|
Function |
Jumper/Switch |
Position | |
|
BIOS type select 27128 |
JP6 |
pins 1 & 2 closed | |
|
BIOS type select 27256 |
JP6 |
pins 2 & 3 closed | |
|
Monitor type select color |
JP9 |
pins 2 & 3 closed | |
|
Monitor type select monochrome |
JP9 |
pins 1 & 2 closed | |
|
Battery select internal |
JP12 |
pins 2 & 3 closed | |
|
Battery select external |
JP12 |
pins 1 & 2 closed | |
|
Power good signal detect from power supply |
JP13 |
pins 1 & 2 closed | |
|
Power good signal detect from board |
JP13 |
pins 2 & 3 closed | |
|
Bus speed select 8Mhz |
JP17 |
pins 1 & 2 closed | |
|
Bus speed select 6Mhz |
JP17 |
pins 2 & 3 closed | |
|
Parity check enabled |
JP20 |
pins 1 & 2 closed | |
|
Parity check disabled |
JP20 |
pins 2 & 3 closed | |
|
DRAM speed select 1 wait state |
SW1/4 |
On | |
|
DRAM speed select 0 wait states |
SW1/4 |
Off | |
|
DRAM CONFIGURATION | ||||||
|
Size |
Bank 0 |
Parity (P-0) |
Bank 1 |
Parity (P-1) |
Bank 2 |
Bank 3 |
|
512KB |
(4) 44256 |
(2) 41256 |
NONE |
NONE |
NONE |
NONE |
|
512KB |
NONE |
NONE |
NONE |
NONE |
(2) 256K x 9 |
NONE |
|
640KB |
(4) 44256 |
(2) 41256 |
(4) 4464 |
(2) 4164 |
NONE |
NONE |
|
640KB |
NONE |
NONE |
(4) 4464 |
(2) 4164 |
(2) 256K x 9 |
NONE |
|
1MB |
(4) 44256 |
(2) 41256 |
(4) 44256 |
(2) 41256 |
NONE |
NONE |
|
1MB |
(4) 44256 |
(2) 41256 |
NONE |
NONE |
NONE |
(2) 256K x 9 |
|
1MB |
NONE |
NONE |
NONE |
NONE |
(2) 256K x 9 |
(2) 256K x 9 |
|
2MB |
NONE |
NONE |
NONE |
NONE |
(2) 1M x 9 |
NONE |
|
4MB |
NONE |
NONE |
NONE |
NONE |
(2) 1M x 9 |
(2) 1M x 9 |
|
DRAM SWITCH CONFIGURATION | |||
|
Size |
SW1/1 |
SW1/2 |
SW1/3 |
|
512KB |
On |
On |
On |
|
640KB |
On |
Off |
Off |
|
1MB |
On |
Off |
On |
|
2MB |
Off |
On |
On |
|
4MB |
Off |
Off |
On |