Category: <b>serial I/O</b>
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<pre><b>INT 2F - RTS Control TSR - INSTALLATION CHECK</b>

	AX = FEEFh
Return: AX = EFFEh if installed
	    BX = port address
Program: RTS Control TSR is a utility by Michal Szokolo to lower the RTS
	  signal on a COM port during disk accesses to avoid losing incoming
	  data
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