Bitfields for non-VGA mode support:
Bit(s)	Description	)
 7-5	reserved
 4	132-column mode supported
 3	=1 MFI attributes enabled (see AH=12h/BL=37h)
	=0 VGA attributes
 2	16-bit VGA graphics present
 1	adapter interface driver required
 0	BIOS supports information return for adapter interface
SeeAlso: #00040