Format of AMI BIOS subsystem information:
Offset	Size	Description	)
 00h	BYTE	subsystem identifier/logical area type (see #00545)
 01h	DWORD	subsystem (FlashROM page) size in bytes
 05h	BYTE	flag: loadable from file (FFh=yes)
 06h	BYTE	flag: reboot after update (FFh=yes)
 07h	BYTE	flag: update entire image (FFh=yes)
 08h 24 BYTEs	subsystem/logical area name
 20h	BYTE	subsystem identifier???
 21h	BYTE	flag: reprogrammable if FFh
 22h	BYTE	??? (01h,02h seen)
 23h  5 BYTEs	??? (apparently always 00h)
 28h 16 BYTEs	BIOS reserved string (usually version number)
SeeAlso: #00544