Dell OptiPlex Gxi - Manual (Page 42)

1-24 Dell OptiPlex GXi Systems Service Manual
D
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.