Computer Interrupt Levels - DEC DIGITAL PC 3010 System Reference Manual

Computer Interrupt Levels

Interrupt Number
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
Interrupt Source
Timer tick
Keyboard controller
Cascade interrupt
COM2, COM4, if enabled
COM1, COM3, if enabled
Available
Diskette (floppy disk) drive, if enabled
LPT1, LPT3, if enabled
Real Time Clock (RTC)
VGA/USB
Available
Available
Mouse interrupt, if enabled
Math co-processor
IDE primary, if enabled
IDE secondary, if enabled
Device Mapping
B-5