INT 2A U - IBMInternational Busiuness MachinesInternational Busiuness Machines) A hardware, software and other service technology company founded in 1911. PCIBM PC 3270 EMULATION PROGRAM - ???
	AH = 90h
	???
Return: ???
Note:	the LANtastic redirector and SERVER.EXE use this function with AL=01h,
	  03h-07h,0Ch-11h