Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

Chapter 9 251
Intrinsics Reference (cont)
FSETMODE
FSETMODE
Suppresses the output of linefeed.
I16V U16V
FSETMODE(filenum,modeflags);
Use
For asynchronous devices, the only significant use of the FSETMODE
intrinsic is to determine whether or not a linefeed is sent to the
terminal at the end of each input line. For certain applications, you may
need to suppress the linefeed that is sent automatically during normal
operating conditions. In such cases, a call to FSETMODE with the
modeflags parameter set to 4 should be used. To restore transmission
of linefeed, call FSETMODE with modeflags set to 0. FCLOSE also
resets this option.
Parameters
filenum 16-bit signed integer by value (required)
The file number of the file whose access modes are to be
set.
modeflags 16-bit unsigned integer by value (required)
This parameter uses bit groupings to indicate desired
settings of various options. The only option that applies
to asynchronous devices is specified by the value of bit
(13:1), as follows:
Bit (13:1) —Controls issuing of a linefeed to a terminal
after each terminal read.
=1 Inhibit normal terminal control by
terminal driver. The result is that the
driver does not automatically send out
a linefeed at the end of each terminal
input line. (modeflags = 4).
=0 Restore normal terminal control by
terminal driver. If the terminal
operator ends a line of input by
pressing
[Return], the Echo Facility
echoes the carriage return back to the
terminal and the driver sends out a
linefeed to the terminal. If input
reaches the read byte count limit (as
set in the length parameter of FREAD
or in the expectedlength parameter