U.S. ROBOTICS, INC.
HIGH SPEED DUAL ASYNCHRONOUS SERIAL BOARD
|
Card Type |
Serial card |
|
Chipset Controller |
165550AN UART |
|
I/O Options |
Serial port (2) |
|
Maximum DRAM |
N/A |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
9-pin serial port |
CN1 |
9-pin serial port |
CN2 |
|
SERIAL PORT CHANNEL A CONFIGURATION | |||||
|
Setting |
J1 |
J2 |
J3 |
J4 | |
|
COM1: (3F8h) |
Pins 1 & 2 closed |
Open |
Open |
Open | |
|
COM2: (3E8h) |
Open |
Pins 1 & 2 closed |
Open |
Open | |
|
COM3: (2F8h) |
Open |
Open |
Pins 1 & 2 closed |
Open | |
|
COM4: (2E8h) |
Open |
Open |
Open |
Pins 1 & 2 closed | |
|
SERIAL PORT CHANNEL B CONFIGURATION | |||||
|
Setting |
J1 |
J2 |
J3 |
J4 | |
|
COM2: (3E8h) |
Open |
Pins 2 & 3 closed |
Open |
Open | |
|
COM1: (3F8h) |
Pins 2 & 3 closed |
Open |
Open |
Open | |
|
COM3: (2F8h) |
Open |
Open |
Pins 2 & 3 closed |
Open | |
|
COM4: (2E8h) |
Open |
Open |
Open |
Pins 2 & 3 closed | |
|
CHANNEL A INTERRUPT SELECTION | ||||||
|
IRQ |
J5/A |
J5/B |
J5/C |
J5/D |
J5/E | |
|
4 |
Open |
Open |
Closed |
Open |
Open | |
|
2 |
Closed |
Open |
Open |
Open |
Open | |
|
3 |
Open |
Closed |
Open |
Open |
Open | |
|
5 |
Open |
Open |
Open |
Closed |
Open | |
|
7 |
Open |
Open |
Open |
Open |
Closed | |
|
CHANNEL B INTERRUPT SELECTION | ||||||
|
IRQ |
J6/A |
J6/B |
J6/C |
J6/D |
J6/E | |
|
3 |
Open |
Closed |
Open |
Open |
Open | |
|
2 |
Closed |
Open |
Open |
Open |
Open | |
|
4 |
Open |
Open |
Closed |
Open |
Open | |
|
5 |
Open |
Open |
Open |
Closed |
Open | |
|
7 |
Open |
Open |
Open |
Open |
Closed | |