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System Overview 1-17
D
MA Channel Assignments
Table 1-4. DMA Channel Assignments
DREQ Line Used By/Available
DREQ0 Default audio DMA channel assignment
DREQ1 Default audio DMA channel assignment
DREQ2 Generated by I/O controller to enable DMA cycle for
attached diskette drive
DREQ3 Available for use by an expansion card
DREQ4 Reserved — selects second DMA controller
DREQ5 Available for use by an expansion card
DREQ6 Available for use by an expansion card
DREQ7 Available for use by an expansion card