NEC POWERMATE CT 815 - RELEASE NOTES, Service And Reference Manual, Page: 31 / 155

2-4 System Configuration
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.
Serial Port Interrupts
Port Interrupt
COM1 IRQ04
COM2 IRQ03
COM3 IRQ04
COM4 IRQ03
COM1 IRQ03
COM2 IRQ04
COM3 IRQ03
COM4 IRQ04
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.
Jumpers are set correctly at the factory for the system configuration.
Only change or check the appropriate jumper settings. Otherwise, keep the jumpers at their
factory settings.