REFRESH OFF stops the screen from being updated, so anything you draw or print won't be seen until you ask for the screen to be updated with REFRESH. And *REFRESH ON makes it so the screen gets updated automatically again. It's useful for eliminating flicker problems from animations.
Implement *REFRESH from BB4W / BBCSDL:
REFRESH OFF stops the screen from being updated, so anything you draw or print won't be seen until you ask for the screen to be updated with REFRESH. And *REFRESH ON makes it so the screen gets updated automatically again. It's useful for eliminating flicker problems from animations.