Interrupt Controllers - NEC VERSA 6220 Service Manual

Interrupt Controllers

Using interrupts, it is possible to change the system's code sequence. To change the se-
quence, reassign the interrupt-levels. Fifteen interrupts can be used with a cascade connec-
tion of two 82C59 interrupt controllers.
Interrupt-level assignments 0 through 15 are listed in Table 1-4, in order of decreasing
priority.
Controller
(Master/Slave)
Master
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Master
Master
Master
Master
Master
Table 1-4 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
Technical Information 1-21
Device
Counter 0/Timer 1
Keyboard
Programmable Controller
Real-time Clock
Infrared Port
USB Port
PC Card Bus controller
PS/2 Mouse
Math Coprocessor (built into CPU)
Hard Disk Controller 1
IDE DS/MD6000 or PC Card in MD6000
Not used, available
Serial Port
Sound
Diskette Drive Controller
Parallel Port