Jetter JC-120MC, User Manual

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328 Jetter AG
10 Programming
Clearing the screen
In the case of text displays there are two control characters allowing to clear
the screen:
 Totally clearing the screen

Clearing the screen to the end of the line
If these display instructions are used for devices from 8 through 11, theses
characters are not considered as control characters but are displayed as text.
The default character for deleting the whole screen is the underline character
"_".
When this character is used, first, the displayed text is deleted. Then, the
given text is displayed starting from cursor position 1.
Example:
DisplayText( 0 , 10 , 'H_ello' );
Result : The screen is cleared and the word fragment "ello" is displayed
starting from cursor position 1.
The default character for deleting text up to the end of line is the dollar symbol
"$".
This character causes the rest of the line to be cleared, starting from the
present cursor position.
Example:
DisplayText( 0 , 25 , 'Position :$' );
Result: Starting from cursor position 25, "Position :" is displayed, and the rest
of the line is cleared.
If underline and dollar symbol are to be displayed as characters, you have to
change the corresponding control character. Define the control characters in
module registers MR 2839, and MR 2840.
Introduction
Restrictions
Clearing the screen
Delete text to the end of
the line
Changing control
characters