ATA Manager 4.0 supports driver software for internal IDE drives and includes DMA support. For the latest information about ATA Manager 4.0, see Technote #1098, ATA Device Software Guide Additions and Corrections, available on the world wide web at
http://developer.apple.com/technotes/tn/tn1098.html
The web page for Technote #1098 includes a link to a downloadable copy of ATA Device Software Guide .