Serial Port Interrupts; Jumper Settings; System Board Jumper Settings - NEC POWERMATE CT 815 Service And Reference Manual

Serial Port Interrupts

The interrupts for serial port 1 and serial port 2 (if installed) are given in the following table.
Any interrupts used for the built-in serial ports are not available for ISA parallel ports. Also, if
serial ports share an interrupt, verify that hardware and software added to the system can share
these interrupts without problems.

Jumper Settings

Jumpers on the boards and devices in the system are used to set the system configuration.
Boards and devices using jumpers include:
system board
!
hard drive
!
CD-ROM drive.
!
The following paragraphs list the jumpers and their factory settings.

System Board Jumper Settings

The system board has six jumper blocks, as shown on the following figure. Jumper locations are
provided in the following figure. The tables following the figure provide detailed information on
jumper settings and functions.
Only change or check the appropriate jumper settings. Otherwise, keep the jumpers at their
factory settings.
2-4 System Configuration
Serial Port Interrupts
Port
COM1
COM2
COM3
COM4
COM1
COM2
COM3
COM4
Jumpers are set correctly at the factory for the system configuration.
Interrupt
IRQ04
IRQ03
IRQ04
IRQ03
IRQ03
IRQ04
IRQ03
IRQ04