Bitfields for AMD-645 IDE Miscellaneous Control 1 register:
Bit(s)	Description	)
 7	reserved (0)
 6	number of wait states on Master Read Cycle IRDY#
 5	number of wait states on Master Write Cycle IRDY#
 4	enable 1/2 clock advance on FIFO output
 3	enable bus-master IDE status register read retry
 2-0	reserved (0)
SeeAlso: #01034,#01039,#01040