INT 21 - VIRUS - Major BBS - INSTALLATION CHECK                                 
	AX = ABCDh
Return: AX = 1234h if installed
SeeAlso: AH=ABh"VIRUS",AX=ABCDh"SuperVirus"
                                                                                

INT 21 - VIRUS - "SuperVirus 2" - INSTALLATION CHECK
	AX = ABCDh
Return: AX = DCBAh if resident
SeeAlso: AX=ABCDh"VIRUS",AX=BBBBh"VIRUS"