Interrupt Controllers - NEC VERSA TXI Manual

Interrupt Controllers

Using interrupts, hardware can request software services. If non-Plug and Play software
is being used, the interrupt may need to be moved for software application or driver
compatibility. Some interrupts cannot be moved. Fifteen interrupts can be used with a
cascade connection of 8259INTC x 2. The table shows default interrupt level
assignments 0 through 15, in order of decreasing priority.
Priority
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
B-10 Specifications
Name Device
IRQ00 Internal Timer 1
IRQ01 Keyboard
IRQ02 INT from Controller 2
IRQ08 Real-time Clock
IRQ09 Reserved for ACPI SCI
IRQ10 PC CardBus/LAN//Video/USB
IRQ11 Available
IRQ12 PS/2 Mouse/NEC VersaGlide Touchpad
IRQ13 Numeric Data Processor
IRQ14 Hard Disk Controller 1
IRQ15 Not Used
IRQ03 or
IRQ04
IRQ04 or Available
IRQ03
IRQ05 or Sound/Modem or PC CardBus
IRQ09
IRQ06 Diskette Drive Controller
IRQ07 Printer Port (LPT1)
1