POSITIVE CORPORATION
PC425
Processor |
80486SX |
Processor Speed |
25MHz |
Chip Set |
Unidentified |
Max. Onboard DRAM |
5MB |
Cache |
None |
BIOS |
Unidentified |
Dimensions |
254mm x 218mm |
I/O Options |
Parallel port, serial ports (2), VGA port, floppy drive interface, IDE interface, riser slot |
NPU Options |
None |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
Serial port 2 |
J2 |
External battery |
J12 |
Serial port 1 |
J3 |
Power/speed indicator |
J17 |
Parallel port |
J4 |
VGA port |
J22 |
Speaker |
J6 |
Riser Card |
SL1 |
Floppy drive interface |
J10 |
Reset switch |
SW1 |
IDE interface |
J11 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper/Switch |
Position | |
|
Factory configured - do not alter |
E1 |
pins 2 & 3 closed |
|
IDE interface interrupt enabled |
E2 |
pins 1 & 2 closed |
IDE interface interrupt disabled |
E2 |
Open | |
|
Factory configured - do not alter |
E3 |
pins 2 & 3 closed |
|
Factory configured - do not alter |
E4 |
pins 2 & 3 closed |
|
Factory configured - do not alter |
E5 |
pins 2 & 3 closed |
|
Factory configured - do not alter |
E8 |
pins 1 & 2 closed |
|
Factory configured - do not alter |
E9 |
pins 2 & 3 closed |
|
Parity disabled |
E10 |
pins 2 & 3 closed |
Parity enabled |
E10 |
pins 1 & 2 closed | |
|
Factory configured - do not alter |
E11 |
pins 2 & 3 closed |
|
Onboard RAM 256KB to 512KB enabled |
sw2/1 |
Off |
Onboard RAM 256KB to 512KB disabled |
sw2/1 |
On | |
|
Onboard RAM 512KB to 640KB enabled |
sw2/2 |
Off |
Onboard RAM 512KB to 640KB disabled |
sw2/2 |
On | |
|
Security enabled |
sw2/3 |
Off |
Security disabled |
sw2/3 |
On | |
|
Factory configured - do not alter |
sw2/4 |
Off |
DRAM CONFIGURATION | ||
Size |
Bank 0 |
Bank 1 |
1MB |
1MB |
NONE |
5MB |
1MB |
(4) 1M x 9 |
Note: Bank 0 is factory installed and is not configurable. The location is unidentified. |
IDE CONFIGURATION | ||
Setting |
E6 |
E7 |
Primary |
pins 2 & 3 closed |
pins 2 & 3 closed |
Secondary |
pins 1 & 2 closed |
pins 1 & 2 closed |