INT 16 U - PCIBM PC Tools v7-8 DATAMON, v9+ DPROTECT - INSTALLATION CHECK AX = FFA3h BX = 0000h CX = 0000h Return: AX = segment of resident code BX = 5555h CX = 5555h Note: also supported by DOS 6 UNDELETE which is licensed from PCIBM PC Tools SeeAlso: INT 21/AH=3Fh"NB.SYS",INT 21/AX=4101h,INT 2F/AX=6284h