NEC 120Lg manual Interrupt Requests, Pirq and PCI Device, IRQ and I/O Port Addresses

Interrupt Requests

The factory-set interrupt requests (IRQs) are listed below.

IRQ	Peripheral Device (Controller)	IRQ	Peripheral Device (Controller)
0	System timer	12	Mouse
1	Keyboard	13	Numeric processor
2	–	14	Primary IDE
3	COM2 serial port (PCI)	15	Secondary IDE
4	COM1 serial port (PCI)	16	USB
5	PCI	17	VGA
6	Floppy disk drive	18	–
7	PCI	19	USB
8	Real-time clock	30	LAN1
9	ACPI compliant system	31	LAN2
10	PCI	49	Adaptec SCSI
11	PCI	50	Adaptec SCSI

PIRQ and PCI Device

The factory-set PCI device interrupts are assigned as follows. Use the BIOS setup utility, BIOS, for interrupt setup.

Menu Option	Interrupt
PCI IRQ 1	On-board SCSI (Channel 0), PCI slot #6 (INT D)
PCI IRQ 2	On-board SCSI (Channel 1), PCI slot #6 (INT C)
PCI IRQ 3	On-board LAN #1
PCI IRQ 4	On-board LAN #2
PCI IRQ 5	On-board GA
PCI IRQ 6	PCI slot #3 (INT A)
PCI IRQ 7	PCI slot #4 (INT A)
PCI IRQ 8	PCI slot #6 (INT A)
PCI IRQ 9	PCI slot #2 (INT A)
PCI IRQ 10	PCI slot #5 (INT A)
PCI IRQ 11	PCI slot #1 (INT A)
PCI IRQ 12	PCI slot #1 (INT D), PCI slot #2 (INT B), PCI slot #3 (INT B),
	PCI slot #4 (INT C), PCI slot #5 (INT C)
PCI IRQ 13	PCI slot #1 (INT B), PCI slot #2 (INT C), PCI slot #3 (INT C),
	PCI slot #4 (INT D), PCI slot #5 (INT D), PCI slot #6 (INT B)
PCI IRQ 14	PCI slot #1 (INT C), PCI slot #2 (INT D), PCI slot #3 (INT D),
	PCI slot #4 (INT B), PCI slot #5 (INT B)

C-2 IRQ and I/O Port Addresses