Common Options : Channel 1, Channel 3

Details

This feature is usually found under the Parallel Port Mode function. It's slaved to that function so if you do not enable either ECP or ECP+EPP, this feature will disappear from the screen or appear grayed out.

You can use this feature to select the DMA channel of your preference. Normally, the default value of Channel 3 will work just fine. You should only select the alternative value of Channel 1 if there's a DMA channel conflict with another device.