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

Chapter 8 215
Intrinsics Reference
FDEVICECONTROL
The following special characters retain their meaning:
AEOR character Alternate End of Record
[Break] System Break
[CTRL]R Same as XON if it is first character in
the record
[CTRL]Q XON
[CTRL]S XOFF
If a
[Return] is issued via PAD, and the EOR is not
[Return], the EOR will be set and a timer (.5 second) will
be enabled that will timeout and transmit the data if
the user enters the EOR but does not enter a
[Return].If
[Return] is the EOR character, the system will wait for a
[Return] and the timer (.5 second) will not time out.
If issued against a terminal connected via VT, this call
will return a CCE condition code but no device control
action will take place.
40 Define single type 2 EOR character (AEOR).
This directive specifies an AEOR (Additional End of
Record) character and enables its use. It is the same as
FCONTROL (25). The high order byte of buffer
(value*256) contains the new AEOR character. Use a
NUL character to disable the AEOR character. You can
use any character as the AEOR character; however,
avoid the following characters because their use may
yield unpredictable results:
[CTRL]@ NUL (null)
[CTRL]Q XON
[CTRL]S XOFF
[CTRL]Y the Subsystem break by default
[Return] carriage return
[CTRL]J line feed
[CTRL]X cancel line character by default
[CTRL]H backspace by default
[DC2] block mode alert character by default
[ESC] escape
The Define Single Type 2 EOR character (AEOR)
control directive (FCONTROL 25 or
FDEVICECONTROL 40) and Define Multiple Type 2