Dma channel assignments, Dma channel assignments -24, Table 1-4 – Dell OptiPlex Gxi User Manual

Page 42: Dreq line assignments -24, Ma channel assignments

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Dell OptiPlex GXi Systems Service Manual

MA Channel Assignments

Table 1-4. DREQ Line Assignments

DREQ Line

Used By/Available

DREQ0

Available

DREQ1

Available

DREQ2

Generated by super I/O controller to initiate DMA cycle for
attached diskette drive

DREQ3

Available

DREQ4

Generated by bus controller chip to activate second DMA
controller

DREQ5

Available

DREQ6

Available

DREQ7

Available

NOTE: The built-in sound controller, built-in NIC, and built-in video controllers are assigned
available DMA channels automatically during system start-up.