1 DUPlex
	DUPlex permits one to connect to the PDP11/45 computer from any
	terminal on the PDP11/44. Files may be also transmitted and received.
 
	calling		MCR>DUP
 
 
	Control-B:  Exit from DUPLEX.  Terminal talks to MCR.
	Control-T:  Transmit a file.  Program will prompt for a filespec. i.e.
                    DUPLEX>=SY0:[100,200]FileName.Typ;4.  The "=" is mandatory.
	Control-P:  Toggle between line-by-line  and  whole-file transmission.
	Control-N:  Transmit one line in line-by-line  transmission mode.
	Control-A:  Abort transmission of a file.
	Control-F:  Open/close file RECEIVED.DAT  file. (Closed by Control-B)
	Control-]:  Sets up line delay value by reading 1  character and
                    and subtracting 48.  from it (ASCII 0).
	Control-\:  Toggles line delay off/on.  In line mode, if line delay is
                    on, the file is transmitted 1 line at a time with automatic
                    proceeding after  "delay"  ticks between lines.
	Control-Y:  Toggles character delay.  This will insert a 1 tick delay
                    between sending characters if set.
