MICRO EQUIPMENT CORPORATION
UN-451
|
Card Type |
Multi I/O card |
|
Chipset/Controller |
Unknown |
|
I/O Options |
Game port, parallel port, serial ports (2) |
|
Maximum DRAM |
N/A |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Parallel port |
CN1 |
Serial port 1 |
ASYN1 |
|
Game port |
CN2 |
Serial port 2 (optional) |
ASYN2 |
|
PARALLEL PORT CONFIGURATION | ||
|
LPT/Address/IRQ |
JP1 | |
|
LPT1/378h/IRQ7 |
Pins 5 & 6/2 & 3 closed | |
|
LPT2/278h/IRQ5 |
Pins 4 & 5/1 & 2 closed | |
|
Disable |
Pins 4, 5, & 6/1, 2, & 3 all open | |
|
SERIAL PORT 1 (ASYN1) CONFIGURATION | ||
|
COM/Address/IRQ |
JP1 | |
|
COM1/3F8h/IRQ4 |
Pins 20 & 21/10 & 11 closed | |
|
COM2/2F8h/IRQ3 |
Pins 16 & 17/11 & 12 closed | |
|
COM4/2E8h/IRQ3 |
Pins 19 & 20/11 & 12 closed | |
|
Disable |
Pins 16 & 17/19, 20, & 21/10, 11, & 12 all open | |
|
SERIAL PORT 2 (ASYN2) CONFIGURATION | ||
|
COM/Address/IRQ |
JP1 | |
|
COM2/2F8h/IRQ3 |
Pins 17 & 18/8 & 9 closed | |
|
COM3/3E8h/IRQ4 |
Pins 13 & 14/7 & 8 closed | |
|
COM4/2E8h/IRQ3 |
Pins 14 & 15/8 & 9 closed | |
|
Disable |
Pins 17 & 18/13, 14, & 15/7, 8, & 9 all open | |
|
MISCELLANEOUS TECHNICAL NOTES |
|
Serial port 2 (ASYN2) exists only on model UN451b. Model UN-451a has only one serial port |
|
The pin numbers for JP1 printed on the actual card are incorrect. Use the numbers depicted on the above diagram to re-configure the card. |
|
The game port can be disabled by cutting a wire on the soldering side of the card. It is located near the edge opposite of the external ports and toward the center. |