Setting Parameters using Commands

The commands in this section all let you set local X.3 parameter values. They are listed in alphabetical order, and the X.3 parameter number for each one is given.

breakaction

The breakaction command sets X.3 parameter 7.

This decides what action is taken when you use the break command. Possible values are:

Value	Meaning
0	No action
1	Send an interrupt packet
2	Send a reset packet
5	The default value. Send and interrupt packet and an indication of break
8	Exit Call Mode for Command Mode
21	Send an interrupt packet and an indication of break, then discard output from the host.

Entering breakaction with no argument displays the current setting.

echo

The echo command sets X.3 parameter 2.

Use echo to turn the pad program's echoing on or off. By default, echoing is on. This means that as well as processing characters it receives, the pad program echoes them back to the terminal.

emask

The emask command sets X.3 parameter 20.

It lets you decide which characters are not echoed to the screen. Possible values are:

Mask Value	Characters Not Echoed
1	CR
2	LF
4	VT, HT, FF
8	BEL, BS
16	ESC, ENQ
32	ACK, NAK, STX, SOX, EOT, ETB, ETX
64	DEL, CAN, DC2
128	All other control characters

To set more than one value, add them together. For example the default value is 192, which means 128 plus 64.

flow

The flow command sets X.3 parameter 5.

It enables or disables local flow control processing of XON and XOFF characters. Switching flow control on, using flow on, lets you use Ctrl-s to halt terminal output and Ctrl-q to restart it. If you are using an application that needs to use these control characters for other purposes, for example an EMACS-type editor, turn flow control off. By default, flow control is on.

Entering flow without a parameter displays the current setting.

forward

The forward command sets X.3 parameter 3.

forward allows you to select the character sequence you want to use to tell the pad program that it has received a complete character sequence that it should assemble and forward.

Possible values are:

Value	Data-forwarding characters
1	alphanumeric characters
2	CR
4	ESC, BEL, ENQ, ACK
8	DEL, CAN, DC2
16	ETX, EOT
32	HT, LF, VT, FF
64	all other control characters, except XON, XOFF, DEL, CAN, DC2

To enter a combination of values, add them together, for example, the default value is 48, that is 16 plus 32.

If you do not specify a value, forward displays the current setting.

linefeed

The linefeed command sets X.3 parameter 13.

This determines whether the PAD will set a Line Feed character when transferring data. Possible values are:

Value	Effect
0	No line feed insertion
1	add LF after a CR in data from the host
2	add LF after a CR in data to the host
4	add LF after echoing a CR

The linefeed setting has no effect in native mode, unless echoing is on. In this case, setting 4 is valid.

In transparent mode, setting 1 has no effect.

To use more than one value, add them together. For example the default value is 6, 2 plus 4.

Entering linefeed without a value displays the current setting.

message

The message command sets X.3 parameters 2, 4, 10 and 15.

The effect of this is that the pad program echoes the characters you type and handles line-editing. This is the most appropriate type of echoing to use when you are using the operating system functions of the remote host. Using the pad to handle echoing and line-editing minimizes the burden placed on the network and the remote host.

Enter message without a parameter to change to message mode.

native

The native command sets X.3 parameters 2, 4, 10 and 15.

The effect of this is that the remote host echoes the characters you type and handles line-editing. This is the appropriate mode to use for many screen-oriented applications. Using native mode places a high burden on both the network and remote host.

Enter native without a parameter to change to native mode.

pagewait

The pagewait command sets X.3 parameter 22.

pagewait tells the display to pause after the number of lines you specify. The default value is 0, meaning that the display does not pause.

Enter pagewait without a value to display the current setting.

printer

The printer command sets X.3 parameter 19.

printer notifies the pad program that you are using a hardcopy terminal.

transparent

The transparent command sets X.3 parameters 2, 4, 10 and 15.

The effect of setting transparent mode is that the pad echoes the characters you type, but does not format them.

vdu

The vdu command sets X.3 parameter 19.

vdu notifies the pad program that you are using a video terminal.