Protected Character Clearing

If the terminal supports protected mode clearing, the following termcap sequences may be used:

Name	Description
Cw=str	Clear bright characters to end of screen
Cx=str	Clear bright characters in screen
Cy=str	Protect mode on
Cz=str	Protect mode off

Prior to clearing a portion of the screen, the presence of the protect mode set/reset will be tested. When possible, the sequence "Cy" will be sent immediately prior to the clear operation, and the "Cz" sent after the clear operation. After either the "Cy" or "Cz" is sent, the cursor is positioned at the start of the area to be cleared.

The protected clearing should clear all high-intensity characters to high-intensity blank characters for both the "clear to EOS" and the "clear screen."