NEC Versa 2200C Series Manual page 79

Interrupt Controllers
Using interrupts, it is possible to change the code sequence.
To change the sequence, reassign the interrupt levels. Fif-
teen interrupts can be used with a cascade connection of
8259INTC x 2. The table shows 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
Master
Master
Master
Master
Master
B-6 Specifications and Environment
PRIORITY NAME DEVICE
0 IRQ0 Timer 1 counter 0
output
1 IRQ1 Keyboard (Output buffer
full)
2 IRQ2 INT output from
controller 2
3 IRQ8 Real time clock
4 IRQ9 Reserved
5 IRQ10 Reserved
6 IRQ11 Reserved
7 IRQ12 Mouse
8 IRQ13 (Co-processor)
9 IRQ14 Hard disk controller 1
10 IRQ15 Reserved
11 IRQ3 Serial port 2 (Internal
Fax/Modem)
12 IRQ4 Serial port 1
13 IRQ5 Reserved
14 IRQ6 Floppy disk controller 1
15 IRQ7 Parallel port 1