INT 2F - RTS Control TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. - INSTALLATION CHECK
	AX = FEEFh
Return: AX = EFFEh if installed
	    BX = port address
Program: RTS Control TSR(Terminate and Stay Resident) A program which remains in memory after terminating in order to provide services to other programs or the user.  The name comes from the name of the DOS function call used to remain in memory after termination. is a utility by Michal Szokolo to lower the RTS
	  signal on a COM port during disk accesses to avoid losing incoming
	  data