6. Appendix
BX710 series User’s Manual
113
Interrupt Level List
Table 6.3. Hardware Interrupt Levels (Factory Settings)
Type 8259 Priority
Description
Vector
NMI High
-I/O CHK
02H
IRQ0 MASTER
↑
Timer 0
08H
IRQ1 ”
⏐
System reserved
09H
IRQ2 ”
⏐
Interrupt controller 2 (slave)
0AH
IRQ8 SLAVE
⏐
Real-time
clock
70H
IRQ9 ”
⏐
System reserved
71H
IRQ10 ”
⏐
Not in use (Available for users)
72H
IRQ11 ”
⏐
Not in use (Available for users)
73H
IRQ12 ”
⏐
Not in use (Available for users)
74H
IRQ13 ”
⏐
Co-processor
75H
IRQ14 ”
⏐
Primary IDE
76H
IRQ15 ”
⏐
Not in use (Available for users)
77H
IRQ3 MASTER
⏐
Serial port 2 (COM2)
0BH
IRQ4 ”
⏐
Serial port 1 (COM1)
0CH
IRQ5 ”
⏐
Not in use (Available for users) *1
0DH
IRQ6 ”
↓
Not in use (Available for users) *2
0EH
IRQ7
”
Low
Not in use (Available for users) *3
0FH
*1 IRQ5 is used as default when the serial port 3 is set to Enable.
*2 IRQ6 is used as default when the serial port 4 is set to Enable.
*3 IRQ7 is used as default when the serial port 5 is set to Enable.
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