INT 66 - PenDOS - PKEYUS - GET VERSION AH = 40h Return: CF clear AX = 0000h BH = major version (02h for version bundled with IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. DOS 6.1) BL = minor version (00h for version bundled with IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. DOS 6.1) DL = ??? (4Eh) DH = ??? (0Eh)