HP dc72 HP Compaq dx7300 and dc7700 Business PC Technical Reference Guide, 1st - Page 64
Table 4-7., Maskable Interrupt Priorities and Assignments
View all HP dc72 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 64 highlights
System Support 8259 Mode The 8259 mode handles interrupts IRQ0-IRQ15 in the legacy (AT-system) method using 8259-equivalent logic. Table 4-7 lists the standard source configuration for maskable interrupts and their priorities in 8259 mode. If more than one interrupt is pending, the highest priority (lowest number) is processed first. Priority 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 -- Table 4-7. Maskable Interrupt Priorities and Assignments Signal Label Source (Typical) IRQ0 Interval timer 1, counter 0 IRQ1 Keyboard IRQ8- Real-time clock IRQ9 Unused IRQ10 PCI devices/slots IRQ11 Audio codec IRQ12 Mouse IRQ13 Coprocessor (math) IRQ14 Primary IDE controller IRQ15 Sec. IDE I/F controller (not available on SATA units) IRQ3 Serial port (COM2) IRQ4 Serial port (COM1) IRQ5 Network interface controller IRQ6 Diskette drive controller IRQ7 Parallel port (LPT1) IRQ2 NOT AVAILABLE (Cascade from interrupt controller 2) 4-12 www.hp.com Technical Reference Guide