Bitfields for Intel 82371MX PCI DMA Enable register:
Bit(s)	Description	)
 7	DMA CH7 is on PCI Bus
 6	DMA CH6 is on PCI Bus
 5	DMA CH5 is on PCI Bus
 4	reserved
 3	DMA CH3 is on PCI Bus
 2	DMA CH2 is on PCI Bus
 1	DMA CH1 is on PCI Bus
 0	DMA CH0 is on PCI Bus
SeeAlso: #01168,PORT xxxxh"Intel 82371"