Article View: comp.sys.ibm.pc.misc
Article #2809Re: HERCULES Graphics
From: Charles Noren
Date: Tue, 28 Aug 1990 14:18
Date: Tue, 28 Aug 1990 14:18
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2026 bytes
In article <12703@netcom.UUCP> ergo@netcom.uucp writes:
>In <39522@cci632.UUCP> sjo@cci632.UUCP (Steve Owens) writes:
>And the only libraries for writing Hercules software were those
>programmers provided for themselves. Since a minor mistake in such
>libraries could destroy your monitor, obviously people weren't
>anxious to experiment.
This reminds me of the time I was writing Hercules driver
software for my clone Hercules card, when Turbo C didn't yet
have graphics support. The documentation was not clear at one
point, I could code it one way or another. I wrote the function
up and sat for half an hour wondering if I should run it, knowing
the dangers of being wrong. I finally decided to go for it. The
screen went blank with a click, followed by a loud high-pitched
squeal with a bright dot in the center of the screen, which lasted
for about 2-3 seconds, followed by a pop and a blank screen.
I turned the computer and monitor off, and turned it back on and
I got some wierd scan lines on my monitor.
Last rites for my monitor were held at the local T.V. repair shop.
I bought a new monitor, brought it home and hooked it to my
computer. I changed my function ...and waited until the next
day to try it. I entered my test program, hit return, the screen
went blank with a click ...and my little graphics drawing came up.
I was lucky that day.
--
Chuck Noren
NET: dinl!noren@ncar.ucar.edu
US-MAIL: Martin Marietta I&CS, MS XL8058, P.O. Box 1260,
Denver, CO 80201-1260
Phone: (303) 971-7930
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!ncar!dinl!noren From: noren@dinl.uucp (Charles Noren) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: HERCULES Graphics Keywords: vs. VGA, EGA, CGA, whatever. What's the difference? Message-ID: <1717@dinl.mmc.UUCP> Date: 28 Aug 90 14:18:12 GMT References: <39522@cci632.UUCP> <12703@netcom.UUCP> Reply-To: noren@dinl.UUCP (Charles Noren) Organization: Martin Marietta I&CS, Denver CO. Lines: 33