Bitfields for AMD-640 PCI Target Control register:
Bit(s)	Description	)
 7	slow memory decoding (must be set if fast back-to-back cycles enabled)
 6	add one wait state to TRDY# response on reads
 5	add one wait state to TRDY# response on writes
 4	reserved (0)
 3	assert STOP# after write timeout
 2	assert STOP# after read timeout
 1	enable sampling of PCI LOCK# pin
 0	force AMD-640 to initiate PCI arbitration if FRAM# not asserted within
	  16 PCI clocks of last GNT#
SeeAlso: #00983,#01006,#01008