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Parallel Port ECP DMA Channel
If your system supports ECP parallel port mode and you have the port set to use ECP, you must use this setting to assign a DMA channel for use by the port. The usual options are "DMA 1" and "DMA 3".
Note: This setting is
either locked out or ignored if the parallel port is disabled, or if the parallel port
mode is not set to ECP.
Warning: Some BIOSes
allow this to be set to DMA channel 2 as well, which is normally reserved for the floppy
disks. This will often create a resource conflict if chosen.
Next: PS/2 Mouse Enable