Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!spool.mu.edu!mips!pacbell.com!ucsd!ucrmath!watnxt3!duchow From: duchow@watnxt3.ucr.edu (John Duchowski) Newsgroups: comp.sys.ibm.pc.hardware Subject: EGA Graphics Problems Keywords: Keywords: Adapter, Monitor Problems Message-ID: <15082@ucrmath.ucr.edu> Date: 7 Jun 91 23:37:23 GMT Sender: news@ucrmath.ucr.edu Organization: University of California, Riverside Lines: 32 Hello Everyone, Recently, I have observed some unusual behavior of my EGA monitor, though I am not sure whether it is the EGA card, EGA monitor or some other source (virus ?) that is causing all this. The symptoms are as follows: in certain cases, usually where drawing a circle filled with white color is involved, the process gets out of control and paints the ENTIRE screen with white color. In certain cases, I need to reboot the system, but in others, hitting a key which would normally allow continuation of the program, let's me keep going, though the white background remains. This happens for example with planets.c (Borland demo program) and Graftool (graphics package). In the first case, I do need to reboot, but in the second, I can keep going (though it difficult as some of the key labels get painted over). This bizzare behavior happens in only few select instances, and running AT diagnostics, for example, does not spot the problem. The very first oc- curance of this was with Word Gallery (educational program from simtel20) about a year or so ago. Since everything else worked fine, I paid no at- tention to it until now. Has nybody else experienced anything similar ? Is there some way which would help me to diagnose or pinpoint the problem ? (Why is this happening to ME ? :), etc). My system is: true blue IBM AT, with EGA Card (256 K) and EGA monitor Phoenix BIOS (AT-specific, 3.10, I think) ** 640 K RAM, 1024 Extended, 512 Expanded ** the Word Gallery problem occured even with the true blue IBM BIOS. Thank you for any hints and/or comments, - John Duchowski