MPE/iX Intrinsics Reference Manual (32650-90875)

136 Chapter5
Command Definitions (FCONTROL - FLOCK)
FCONTROL
Use of timers during block mode is encouraged to eliminate port "hangs"
due to a data overrun occurring when the last character is read. The
standard block mode read timer is disabled when the user block mode
protocol is enabled.
Not reset in break mode; not reset after FCLOSE. Under default conditions,
user block mode is disabled.
34/U16 Enable line deletion response:
Item has no meaning; enter a value of 0 to satisfy internal requirements.
In character mode, with standard editing, the computer will output !!!,
carriage return, and line feed when the line deletion (cancel) character is
entered. This is referred to as
CTRLX echo (the default line deletion
character).
Not reset in break mode; reset after FCLOSE. (Default)
For devices connected through PAD the line deletion response is never
printed in response to the line deletion character. If this call is issued,
condition code CCE (2) is returned, but no device control action occurs.
35/U16 Disable line deletion response:
Item has no meaning; enter a value of 0 to satisfy internal requirements.
The line deletion response can be suppressed by calling this parameter.
The data is deleted in the input buffer, but no !!!, carriage return, line feed
is issued.
Not reset in break mode; reset after FCLOSE (enables line deletion
suppression, the system default condition).
For devices connected through PAD, the line deletion response is never
printed in response to the line deletion character. If this call is issued,
condition code CCE (2) is returned, but no device control action occurs.
36/U16 Set parity:
Item passes a value representing the specified parity condition and then
returns the value of a previous setting:
0 No parity check on input, eighth bit set to 0 on output
(parity type = zeros)
1 No parity check on input, eighth bit set to 1 on output
(parity type = ones)
2 Even parity checked on input, even parity generated on
output (parity type = even)
3 Odd parity checked on input, odd parity generated on
output (parity type = odd)
When specified, this option changes the terminal parity setting, and the
previous setting is returned to the call as the new value of
item . It is
possible to determine a terminal's parity setting with parity disabled.