Interrupt Controllers - NEC VERSA LXI - VERSION 10-2000 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.
Controller
Master/Slave
Master
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
B-10 Specifications
System Interrupt Controllers
Priority Name
0 IRQ00
1 IRQ01
2 IRQ02
3 IRQ08
4 IRQ09
5 IRQ10
6 IRQ11
7 IRQ12
8 IRQ13
9 IRQ14
10 IRQ15
11 IRQ03
12 IRQ04
13 IRQ05
14 IRQ06
15 IRQ07
Device
SystemTimer 1
Keyboard
Programmable Controller
Real-time Clock
USB Port
PC CardBus Controller/Video
VersaBay in Versa Dock
PS/2 Mouse/NEC VersaGlide
Math Coprocessor (built into CPU)
Hard Disk Controller 1
VersaBay III
Infrared Port, when enabled
Serial Port
Sound/PC CardBus Controller
Diskette Drive Controller
Parallel Port