Int 21 Fn D5AA  - Virus - "diamond-a", "diamond-b" - Installation Check    [v]

   AX = D5AAh

Return: AX = 2A55h if "Diamond-A" resident
   AX = 2A03h if "Diamond-B"-family virus resident

See Also: AX=D000h,AH=D5h"VIRUS",AX=D5AAh/BP=DEAAh