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)