http://invisible-island.net/ Copyright © 1996-2022,2023 by Thomas E. Dickey VTTEST – VT100/VT220/XTerm test utility Synopsis Vttest tests the compatibility (demonstrates the non-compatibility) of so-called “VT100-compatible” terminals. In conformance of the good old hacker traditions, the only documentation of this program is the source code itself. To understand it, you also need a copy of the or