Bitfields for AMD-645 USB Miscellaneous Control 2 register:
Bit(s)	Description	)
 7-3	reserved (0)
 2	only trap port 60h/64h bits when trap-enable bits are set
 1	do not pass A20GATE command sequence (from UHCI) through I/O port 64h
 0	reserved (0)
SeeAlso: #01046,#01047,PORT 0064h