Bitfields for Intel 82441FX DBX buffer control register:
Bit(s)	Description	)
 7	enable delayed transactions
 6	enable CPU-to-PCI IDE posting
 5	enable USWC Write Post during I/O Bridge access
 4	disable PCI Delayed Transaction timer
 3	enable CPU-to-PCI Write Post
 2	enable PCI-to-DRAM pipeline
 1	enable PCI Burst Write Combining
 0	enable Read-Around-Write
SeeAlso: #01229,#01230