Bitfields for OPTi 82C750 Vendetta (device 1) miscellaneous control 3:
Bit(s)	Description	)
 7	pin AB15 functionality
	0 = DACK5#
	1 = PPWRL+PPWRL2
 6	IDE functionality support enable
 5	reserved (read-only)
 4	ISA bus AT command 1 wait state extension disable
 3-2	reserved
 1	pin AE14 functionality
	0 = controlled by offset 44h bits 1-0
	1 = GPCS2#
 0	reserved
SeeAlso: #00939,#00946,#00947