Intel DG965PZ Product Specification - Page 46
Interrupts
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Intel Desktop Board DG965PZ Technical Product Specification 2.5 Interrupts The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the Advanced Programmable Interrupt Controller (APIC) portion of the ICH8 component. The PIC is supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is supported in Windows 2000 and Windows XP and supports a total of 24 interrupts. Table 16. Interrupts IRQ System Resource NMI 0 1 I/O channel check Reserved, interval timer Reserved, keyboard buffer full 2 Reserved, cascade interrupt from slave PIC 3 COM2 (Note 1) 4 COM1 (Note 1) 5 LPT2 (Plug and Play option)/User available 6 User available 7 LPT1 (Note 1) 8 Real-time clock 9 Reserved for ICH8 system management bus 10 User available 11 User available 12 Onboard mouse port (if present, else user available) 13 Reserved, math coprocessor 14 Serial ATA (if present, else user available) 15 16 (Note 2) 17 (Note 2) 18 (Note 2) 19 (Note 2) 20 (Note 2) 21 (Note 2) 22 (Note 2) 23 (Note 2) Serial ATA (if present, else user available) USB UHCI controller 1 / USB UHCI controller 4 (through PIRQA) AC '97 audio/modem/User available (through PIRQB) ICH8 USB controller 3 (through PIRQC) ICH8 USB controller 2 (through PIRQD) ICH8 LAN (through PIRQE) User available (through PIRQF) User available (through PIRQG) ICH8 USB 2.0 EHCI controller/User available (through PIRQH) Notes: 1. Default, but can be changed to another IRQ. 2. Available in APIC mode only. 46