4. Interrupt Controller
ÛZIATECH
37
Interrupt Architecture (see notes following table)
Notes
CPU
Interrupt
Programmable Interrupt Sources
(default in bold)
1
IRQ0
System Timer 0
2
,
3
IRQ1
Local keyboard
or
INTRQ1*
CTC2, Ch.0
4
IRQ2
Cascade
3
IRQ3
COM2
CTC 2, Ch.1
3
IRQ4
COM1
CTC 2, Ch.0
3
IRQ5
INTRQ4*
CTC 2, Ch.1
3
IRQ6
INTRQ2*
CTC 2, Ch.0
3
IRQ7
Local LPT
CTC 2, Ch.1
5
IRQ8
Real-Time Clock
3
IRQ9
INTRQ*
CTC 2, Ch.0
3
IRQ10
J1, pin 4
CTC 2, Ch.1
CTC 2, Ch.0
PCI
3
IRQ11
J1, pin 6
CTC 2, Ch.0
CTC 2, Ch.1
PCI
3
IRQ12
J1, pin 10
CTC 2, Ch.1
CTC 2, Ch.0
PCI
6
IRQ13
Math Coprocessor
3
,
7
IRQ14
Local IDE
or
INTRQ3-
CTC 2, Ch.0
8
IRQ15
CTC 2, Ch.2