Bitfields for Intel 82371FB/82371SB/82371MX motherboard DMA control:
Bit(s)	Description	)
 7	type F DMA buffer enable
 6-4	reserved
 3	(82371FB only) disable motherboadr DMA channel
	(SB/MX) reserved (0)
 2-0	DMA channel number (100 = disabled [default])
	(82371FB) Type F and Motherboard DMA
	(82371SB/MX) Type F DMA
SeeAlso: #01167,#01168,#01218