Instruction Manual

Chapter 3 Hardware
ETX-PVR Reference Manual 21
Interrupt Channel Assignments (IRQs)
The interrupt channel assignments are listed in Table 3-1.
Legend: D = Default, O = Optional, X = Fixed
Table 3-1. Interrupt Channel (IRQs) Assignments (Typical)
Device vs IRQ No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Timer X
Keyboard X
Secondary Cascade X
COM1 O D
COM2 D O
Floppy D
Parallel O D
RTC X
IDE D
Math Coprocessor X
PS/2 Mouse X
HD Audio CODEC D
PCI INTA Automatically Assigned
PCI INTB Automatically Assigned
PCI INTC Automatically Assigned
PCI INTD Automatically Assigned
USB Automatically Assigned
Video Automatically Assigned
Ethernet Automatically Assigned
NOTE The IRQs for the Ethernet, Video, USB, and PCI are automatically assigned by
the BIOS Plug and Play logic. Local IRQs assigned during initialization can not
be used by external devices.