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System Specifications 139
DMA usage
The following table lists the direct memory access (DMA) channels that the
system typically uses and which ones are available for use by add-in devices.
IRQ5 INT5 Parallel port II
IRQ6 INT6 Diskette port
IRQ7 INT7 Parallel port
IRQ8_L INT8 RTC interrupt
IRQ9 INT9 Signalcontrolinterrupt (SCI)usedby ACPI-compliant
operating system
IRQ10 INT10
IRQ11 INT11
IRQ12 INT12 Mouse interrupt
IRQ13 INT13 Co-processor interrupt
IRQ14 INT14 Compatibility IDE interrupt from primary channel IDE
devices 0 and 1
IRQ15 INT15
SMI_L System management interrupt - general purpose
indicator sourced through the PID to the processors
DMA Resource
0 Cascade
1 Available
2 Floppy Controller
3 Available
4 Redirect
Cascade
5 Available
6 Available
7 Available
Interrupt I/O APIC
Level
Description
8508366.book Page 139 Tuesday, October 23, 2001 11:29 AM