6. Appendix
User’s Manual
93
Interrupt Level List
Table 6.2. Hardware Interrupt Levels (Factory Settings)
Type 8259 Priority Vector Remarks
NMI High I/O CH CK or WDT 02H
IRQ0 MASTER ↑ Timer 0 08H
IRQ1 " | Keyboard 09H
IRQ2 " | Interrupt controller 2 (slave) 0AH
IRQ8 SLAVE | Real-time clock 70H
IRQ9 " | Not in use 71H Available to user
IRQ10 " | Not in use 72H Available to user
IRQ11 " | Reserved for PCI device 73H
IRQ12 " | Reserved for PS/2 mouse 74H
IRQ13 " | Reserved for coprocessor 75H
IRQ14 " | Reserved for hard disk 76H Primary
IRQ15 " | Reserved for optional CD-ROM 77H Secondary
IRQ3 MASTER | Serial port B (COM2) 0BH
IRQ4 " | Serial port A (COM1) 0CH
IRQ5 " | Not in use 0DH Available to user
IRQ6 " ↓ Reserved for floppy disk 0EH
IRQ7 " Low Serial port C (touch panel) 0FH Touch panel (Default factory setting)
* Do not use for ISA devices.
Description
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