INT 21 U - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. Genie - Resident Manager - INSTALLATION CHECK AX = 5757h BX = 5757h Return: AX = 0000h if installed BX = ??? DX = ??? DS:SI -> list of 27 DWORDDoubleword; four bytes. Commonly used to hold a 32-bit segment:offset or selector:offset address. entry point addresses Program: IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. Genie is a set of utility TSRs by Helix Software Note: other functions possible if BX <> 5757h, but details not yet available