MPE/iX Intrinsics Reference Manual (32650-90875)
128 Chapter5
Command Definitions (FCONTROL - FLOCK)
FCONTROL
Item
is ignored.
11/U16 Change line speed of a device:
Passes a value specifying a new line speed for both input and output.
The value passed must be expressed in characters per second (1 character
per second = 10-bits per second). The supported choices are:
30 (300 bps)
120 (1200 bps)
240 (2400 bps)
960 (9600 bps)
1920 (19200 bps)
Any setting other than those listed returns CCL (1).
The speed associated with the device must match the physical speed
settings of the device/modem. If the speed setting is changed
programmatically, a request that the speed setting of the device be
manually changed should be made.
If issued against a terminal connected through PAD, CCE (2) is returned,
but there is no effect on the transmission speed, and a meaningless value
is returned in
item
.
When a device is initially opened programmatically, the speed is set to the
default device speed. If the device is opened as a logon device (configured
with speed and parity sensing enabled), the speed setting is sensed from
the first carriage return character received. The default device speed is
configured through the Node Management Configuration Manager
(NMMGR) or the OpenView DTC Manager (networks managed by an
OpenViewworkstation). Reconfigure the device to permanently change the
speed.
Not reset in break mode; not reset after FCLOSE.
Item
is ignored.
12/U16 Enable echo facility:
Returns a value indicating the previous echo status:
0 Echo ON
1 Echo OFF
When enabled, all characters transmitted to the DTC are echoed onto the
terminal's screen (DTC echo). When the system is initialized, all
characters are echoed except for XON, XOFF, NULL, DEL, and DC2.
During binary reads, all characters are passed as data and echoed. For this
reason, echo should be disabled while in binary mode.
During block mode processing, echo should be disabled and local echo
should be used to cause the terminal to write data back to the screen. If
VPLUS is being used for block mode applications, this is done