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System Overview 1-23
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Table 1-9 lists the default DMA channel assignments.
IRQ12 Used by the PS/2 mouse port unless mouse is disabled in
System Setup program
IRQ13 Used by the math coprocessor
IRQ14 Available
IRQ15 Used by embedded server-management functions
DREQ0 Not required for PCI-only system
DREQ1 Not required for PCI-only system
DREQ2 Generated by super I/O controller to initiate DMA cycle for
attached diskette drive
DREQ3 Not required for PCI-only system
DREQ4 Generated by bus controller chip to activate second DMA
controller
DREQ5 Not required for PCI-only system
DREQ6 Not required for PCI-only system
DREQ7 Not required for PCI-only system