Format of 386MAX ROM shadowing record:
Offset	Size	Description	)
 00h	WORD	logical start segment of ROM??? (may be used by BlueMAX when it
		  squeezes together the ROMs to make room)
 02h	WORD	physical start segment of ROM
 04h  2 BYTEs	???
 06h	WORD	size of shadowed ROM in paragraphs
 08h  2 BYTEs	???
 0Ah	WORD	flags
		bit 15: shadowing enabled for this ROM???
		bit 14: ???
		bit 13: ???
		bit 12: ???
		bit 10: ???