Appendix B
ROBO-8773VG User’s Manual
Interrupt Request Lines (IRQ)
Peripheral devices can use interrupt request lines to notify CPU for the service
required. The following table shows the IRQ used by the devices on board.
IRQ#
Current Use
Default Use
IRQ 0
SMARTDRV
System Timer
IRQ 1
SMARTDRV
Keyboard Event
IRQ 2
[Unassigned]
Usable IRQ
IRQ 3
System ROM
COM 2
IRQ 4
System ROM
COM 1
IRQ 5
[Unassigned]
Usable IRQ
IRQ 6
System ROM
Diskette Event
IRQ 7
[Unassigned]
Usable IRQ
IRQ 8
System ROM
Real-Time Clock
IRQ 9
[Unassigned]
Usable IRQ
IRQ 10
[Unassigned]
Usable IRQ
IRQ 11
[Unassigned]
Usable IRQ
IRQ 12
System ROM
IBM Mouse Event
IRQ 13
System ROM
Coprocessor Error
IRQ 14
System ROM
Hard Disk Event
IRQ 15
VIDE-CDD
Usable IRQ
