DEC DECpc 433 - System Interrupt Levels

Device Mapping
Table D-3. System Interrupt Levels
Interrupt
Interrupt Interrupt
Priority
Controller
Number
Source
1
1
IRQO
Timer tick
2
1
IR Qt Keyboard controller
1
IRQ2 Cascade interrupt
3 2
IRQ8 Real-time Clock (RTC)
d
2
IRQ9
Reserved
l 4
-~J~
5 2
IRQlO TIGAvideo
6 2
IRQll
SCSI interrupt
7
2
IRQ12
Mouse interrupt
8
2
IRQ13 Numeric coprocessor
9
2
IRQ14 Hard disk drive
10
2
IRQ15
Reserved
11 1
IRQ3
COM2
i2
1
IRQ4 COM!
13 1
IRQS
LAN interrupt
14 1
IRQ6
Floppy disk drive
15 1 IRQ7
LPTl
D-4
DECpc 433 Workstation Service Guide