Compaq dc7100 HP Compaq dc71xx and dx61xx Series Business Desktop Computers Te - Page 70
Table 4-7., Maskable Interrupt Priorities and Assignments
View all Compaq dc7100 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 70 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 361834-002 Technical Reference Guide