Bitfields for RM386 global flags 4:
Bit(s)	Description	)
 0	"NOV8259" don't virtualize interrupt controller
 1	NOSCSI
 2	NOSCAN
 3	NOTR
 4	ALTBOOT
 5	NOCOMPQ
 6	KB2TRAP
 7	DESHADOW
 8	Video 7 VGA detected
 9	reserved
 10	NOVGA
 11	NOPS2
 12	DEBUG
 13	NOVKB
 14,15	reserved