NCR 7455 Hardware User's Manual page 87

Base I/O Address (Port C)
Use this option to set the base I/O address for serial port C.
1. Move the cursor to Base I/O Address and press Enter.
2. Select the desired setting from the drop-down menu.
220
200
3E8
2E8
Interrupt (Port C/D)
This option sets the interrupt for serial port C/D.
1. Move the cursor to Interrupt and press Enter.
2. Select the desired setting from the drop-down menu.
IRQ 5
IRQ 6
IRQ 7
IRQ 10
IRQ 11
IRQ 15
Chapter 3: Setup 3-13