INT 21 - VIRUS - "CoffeeShop" - INSTALLATION CHECK
	AX = 33DAh
Return: AH = A5h if resident
	    AL = virusA program which attaches itself to other programs for the purpose of duplicating itself.	Viruses often (but not always) contain harmful code which is triggered by some event, after a certain number of reproductions, or on a specific date.  See also worm. version
SeeAlso: AX=33DB,AX=33DCh,AX=330Fh,AX=33E0h,AX=5643h"VIRUS"