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

212 Chapter8
Intrinsics Reference
FDEVICECONTROL
transmission. If the line delete response is disabled,
line deletion still takes place, but !!! is not echoed.
This directive is the same as FCONTROL (34, 35).
If this call is issued against a device connected through
a PAD, DTC Telnet or VT connection, a CCE condition
code is returned but there is no impact on the terminal.
Line deletion characters are controlled locally by PAD
devices.
15 Set transparent editing mode.
This directive enables and disables transparent
(unedited) mode, and sets the EOR and the subsystem
break characters. It is the same as FCONTROL (41).
A buffer value of 0 disables transparent (unedited)
mode, and enables normal editing mode, with
[CTRL]Y
as the subsystem break character and carriage return
as the EOR character.
If buffer is non-0, the low order byte is treated as the
subsystem break character and the high order byte is
treated as the EOR character:
bits (0:8) = subsystem break character
bits (8:8) = EOR character
The special characters listed below may not be used as
the subsystem break or EOR character. A value of 0 in
the subsystem break field disables the subsystem break
facility. The EOR character must be specified when
setting transparent mode. A value of 0 in the EOR field
and a non-zero value in the subsystem break field will
still enable transparent mode but no EOR will be
recognized. Transparent editing mode treats most
special characters as data, but the following special
characters retain their meaning:
AEOR character Alternate End of Record
[Break] System Break
[CTRL]R HP Block mode alert
[CTRL]Q XON
[CTRL]S XOFF
If the device is connected via PAD, the terminal user
must enter a [Return] to signal to the PAD to transmit
data. The subsystem break and EOR charactersdefined
in this directive will still be recognized by the host
software. If the device is connected via VT from an