Int 21 Fn 4B - Elres V1.0 Only - Installation Check [U] AH = 4Bh DS:DX = 0000h:0000h Return: ES:BX -> ELRES history structure (see AH=2Bh/CX=454Ch) DX = DABEh (signature, DAve BEnnett) Program: ELRES is an MS-DOS return code (errorlevel) recorder by David H. Bennett See Also: AH=2Bh/CX=454Ch