Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!husc6!sri-unix!sri-spam!ames!aurora!labrea!glacier!jbn From: jbn@glacier.STANFORD.EDU (John B. Nagle) Newsgroups: comp.lang.modula2 Subject: Modula II on IBM PC with HALO graphics Message-ID: <17237@glacier.STANFORD.EDU> Date: Tue, 8-Dec-87 01:50:49 EST Article-I.D.: glacier.17237 Posted: Tue Dec 8 01:50:49 1987 Date-Received: Sun, 13-Dec-87 09:40:15 EST Organization: Stanford University Lines: 20 Keywords: Modula IBM HALO graphics Has anyone tried Logitec's Modula II with HALO graphics on a PC? The HALO literature claims that it will work. Does it? I would like to map a rectangular array of values into a range of shades of a color, so that I can display map data (obtained from a ranging sonar) as a range of colors from red to green. Can this be done using HALO under Modula II on a PGA or EGA type display? Some questions on Logitec Modula II: 1. Are subranges assigned space appropriately? In particular, does 0..255 occupy only one byte? 2. How well does concurrency work, if at all? Is it possible to concurrently operate async ports while updating the screen? John Nagle