[enterprise] first test

[nitrofurano]

first test for enterprise 64/128, using attr display mode
(as shown at <!-- m --><a class="postlink" href="http://www.boriel.com/wiki/en/index.php/ZX_BASIC:Released_Programs_-_Enterprise#test01_attrdisplaymode">http://www.boriel.com/wiki/en/index.php ... isplaymode</a><!-- m --> )