NEC VERSA 4000 - Interrupt Controllers; NEC Versa 4000 Series Interrupt Level Assignments

1-16 Technical Information
Interrupt Controllers
Using interrupts, it is possible to change the code sequence. To change the sequence, reas-
sign the interrupt-levels. Fifteen interrupts can be used with a cascade connection of
8259INTC x 2.
Interrupt-level assignments 0 through 15 are listed in Table Section 1-6, in order of de-
creasing priority.
Table Section 1-6 NEC Versa 4000 Series Interrupt Level Assignments
Controller
Master/Slave Priority Name Device
Master
0
IRQ00 Counter/Timer 1
Master
1
IRQ01 Keyboard
Master
2
IRQ02 INT output from controller 2
Slave
3
IRQ08 Real-time Clock
Slave
4
IRQ09 Reserved
Slave
5
IRQ10 Reserved
Slave 6
IRQ11 Reserved)
Slave
7
IRQ12 PS/2 Mouse
Slave
8
IRQ13 Math Coprocessor (built into CPU)
Slave
9
IRQ14 Hard Disk Controller 1
Slave 10 IRQ15 Reserved (second IDE on optional
docking station)
Master 11 IRQ03 IR Port
Master 12 IRQ04 Serial Port 1
Master 13 IRQ05 Reserved (sound)
Master 14 IRQ06 Diskette Drive Controller 1
Master 15 IRQ07 Parallel Port 1