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

Chapter 8 201
Intrinsics Reference
FCONTROL(41)
• The read encounters the End-of-Record (EOR)
character defined in param. This character
functions like the
[Return] character does in normal
reads. The EOR is echoed but is stripped from the
user data. No carriage return or line feed is sent to
the terminal.
• The read encounters an Additional End-of-Record
(AEOR) character defined through a previous call to
FCONTROL(25). The read completes with error
END OF LINE (FSERR 31), and the AEOR
character is passed with the input data and included
in the byte count. No carriage return or linefeed is
sent to the terminal.
• The expected byte count specified in the READ,
READX, or FREAD call is reached. The read is
terminated normally, and no carriage return or
linefeed is sent to the terminal.
• The read limit timer set through a call to
FCONTROL(4) expires. The read terminates with
error SOFTWARE TIMEOUT (FSERR 22), and the
data entered before the read timed out is returned.
Table 8-6 Special Characters for Transparent Editing
Break processing, if not disabled, occurs in transparent mode the same
as in normal editing mode. During the break the terminal will operate
in standard editing mode. The terminal will return to transparent mode
if a :RESUME is entered.
Key Function
AEOR Character The AEOR character defined through a previous call to FCONTROL(25).
The read terminates in error, and a call to FCHECK returns an
fserrorcode of 31. The AEOR character is passed with the data and
included in the byte count.
[Break] Causes a system break (when enabled) and transfers control to MPE/iX. If
:RESUME is entered transparent editing is resumed.
[CTRL]Q
(DC1 or XON)
The “resume output” character of the XON/XOFF handshake. This
character is stripped from the input data when XON/XOFF protocol is
enabled.
DC2 When input as first character, it is stripped out. A DC1 ([CTRL]Q) is then
written to the terminal. When not input as the first character, DC2 is a
data character.
[CTRL]S
(DC3 or XOFF)
The “halt output” character of the XON/XOFF handshake. This character
is stripped from the input data when XON/XOFF protocol is enabled.