Category: virus/antivirus

INT 21 - VIRUS - "One Half" - INSTALLATION CHECK

	AX = 4B53h
	BX = 2121h
	CX = 1212h
	DX = 0236h
Return: AX = 454Bh if installed
SeeAlso: AX=4B50h,AX=4B53h,AX=4B55h