INT 21 - ELRES v1.0 only - INSTALLATION CHECK AH = 4Bh DS:DX = 0000h:0000h Return: ES:BX -> ELRES history structure (see #01381 at AH=2Bh/CX=454Ch) DX = DABEh (signature, DAve BEnnett) Program: ELRES is an MS-DOS return code (errorlevel) recorder by David H. Bennett SeeAlso: AH=2Bh/CX=454Ch