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

96 Chapter4
Using FDEVICECONTROL
Examples
You also call FDEVICECONTROL with a control directive of 15 to
disable transparent editing mode. To return to standard editing, call
FDEVICECONTROL with parm1 set to 15, but specify 0 for both the
subsystem break and EOR characters. Figure 4-2 provides an example
of disabling transparent mode. Note that, in this example, parm2
specifies both Read and Write access for the call. The subsystem break
and EOR characters in effect before the call executed can therefore be
identified and reported after the intrinsic completes successfully.