Bitfields for 386MAX feature flags 3:
Bit(s)	Description	)
 0	Windows3 support enabled
 1	SHADOWROM
 2	don't compress ROM (NOCOMPROM)
 3	??? (related to PRGREG=)
 4	??? (related to PRGREG=)
 5	SHADOWRAM
 6	DOS4 specified
 7	NOLOADHIGH
 8	NOPULSE
 11	FORCEA20
 12	DMA buffer enabled
 13	NOSCRUB
 15	NOFRAME