Terminal Device parameter Summary

The following tables provide a brief summary of deviceparameters for terminals, grouped into related areas. For more detailed information, refer to the sections following the OPEN, USE, and CLOSE commands.

Error Processing Device parameters

DEVICE PARAMETER

COMMAND

COMMENT

EXCEPTION=expr

O/U/C

Controls device-specific error handling.

Interaction Management Device parameters

DEVICE PARAMETER

COMMAND

COMMENT

[NO]CENABLE

U

Controls whether <CTRL-C> on $PRINCIPAL causes GT.M to go to direct mode.

CTRAP=expr

U

Controls vectoring on trapped <CTRL> characters.

[NO]EDITING

U

Controls VMS line editing.

[NO]ESCAPE

U

Controls escape sequence processing.

FIELD=intexpr

U

Controls input buffer size.

[NO]INSERT

U

Controls insert or overstrike on input.

OVERSTRIKE

U

Synonym for NOINSERT

[NO]PASTHRU

U

Controls VMS interpretation of special control characters (for example <CTRL-B>).

[NO]TERMINATOR[=expr]

U

Controls characters that end a READ

Flow Control Deviceparameters

DEVICEPARAMETER

COMMAND

COMMENT

[NO]CONVERT

U

Controls forcing input to uppercase.

[NO]FILTER[=expr]

U

Controls some $X, $Y maintenance.

FLUSH

U

Clears the typeahead buffer.

[NO]HOSTSYNC

U

Controls host's use of XON/XOFF.

[NO]READSYNC

U

Controls wrapping READs in XON/XOFF.

[NO]TTSYNC

U

Controls input response to XON/XOFF.

[NO]TYPEAHEAD

U

Controls unsolicited input handling.

Screen Management Deviceparameters

DEVICEPARAMETER

COMMAND

COMMENT

CLEARSCREEN

U

Clears from cursor to end-of-screen.

DOWNSCROLL

U

Moves display down one line.

[NO]ECHO

U

Controls the host echo of input.

ERASELINE

U

Clears from cursor to end-of-line.

LENGTH=intexpr

U

Controls maximum number of lines on a page ($Y).

UPSCROLL

U

Moves display up one line.

WIDTH=intexpr

U

Controls the maximum width of an output line ($X).

[NO]WRAP

U

Controls handling of output lines longer than the maximum width.

X=intexpr

U

Positions the cursor to column intexpr.

Y=intexpr

U

Positions the cursor to row intexpr.

O: Applies to the OPEN command

U: Applies to the USE command

C: Applies to the CLOSE command