Int 21 Fn C603  - Virus - "yankee Doodle" Or "mlti" - Installation Check   [v]

   AX = C603h
   BX = version number (002Ch or 002Dh)
   CF set

Return: CF clear if resident
   ZF set if resident and input BX matches version

See Also: AX=C500h"VIRUS",AX=C700h"VIRUS"