Int 21 Fn FF  - Virus - "sunday", "tumen 0.5", "hero" - Installation Chec  [v]

   AH = FFh

Return: AH = 00h if "Tumen 0.5" or "Hero" resident
   AX = 0400h if "Sunday" resident

See Also: AX=FEDCh"VIRUS",AX=FF01h"VIRUS"