Article View: comp.sys.amiga.tech
Article #7209Re: Simple Frame Buffer boards
From: Brian Witt
Date: Wed, 05 Dec 1990 21:26
Date: Wed, 05 Dec 1990 21:26
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3517 bytes
In article <1990Dec5.165513.16570@eagle.lerc.nasa.gov> fsset@bach.UUCP (Scott E. Townsend) writes:
>In article <1411@mpirbn.mpifr-bonn.mpg.de> p554mve@mpirbn.UUCP (Michael van Elst) writes:
>>Hmm, I can't see much benefit from this besides ease of programming.
>>IMHO, it is sufficient to map a smaller rectangular part. The drawing
>>routines can be adapted without much peformance loss.
>>[..]
>>Michael van Elst
>
>One benifit I can think of is indeed ease of programming, which also results
>is a good size performance gain. For example, a quick circle drawing
>routine would slow down a fair amount if it had to worry about drawing
>across this rectangular window into the real image. This would be a lot like
>clipping, which isn't a real quick operation.
>
(I'm playing the devil's advocate, so keep the flames low. This is more
of a `what if..' than a complaint..)
What about multiple monitors attached to the same box. macintosh's do
this quite naturally. I was told by an ex-Sun employee that SunViews
was kludged to look like it does multiple monitors. Would be neat to
drag your mouse from an interelaced monitor to a productivity monitor.
Having multiple monitors would be like having your display segmented
(evil word, but I'm playing the devil's advocate :-). Each segment
of display memory represents a different physical video board. Would
the solution be similar to vide-paging on, say, an IBM PC VGA board?
This is graphics (slow) overhead, but it would be a great feature.
Is this the way these things are done? However, if the graphics
operation is repeated for each video video monitor, just ignore me.
I do systems, so please someone set me straight here.
But is this a direction that people would like to see tha Amiga travel?
After all, the Copper given multiple scren resolutions without the
cose of multiple screens. However, to complete in a graphics workstation
market, having a 21" mega-graphics display next to a clean textual
display is real glitzy :-). But a $15K Amiga might be *TOO* outrageous.
(many folk have asked for wonder hardware features, but don't want to pay
for them.. :-(
Food for thought. Yearn for Peace.
>------------------------------------------------------------------------
>Scott Townsend | Phone: 216-433-8101
>------------------------------------------------------------------------
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brian witt | brian@babbage.ecs.csus.edu
You are what you click | (and if you click it twice...)
Not representing Cal State Sacramento, the ECS dept, or Iraq
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brian witt | brian@babbage.ecs.csus.edu
You are what you click | (and if you click it twice...)
Not representing Cal State Sacramento, the ECS dept, or Iraq
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!csus.edu!ucdavis!csusac!usenet From: brian@babbage.csus.edu (Brian Witt) Newsgroups: comp.sys.amiga.tech Subject: Re: Simple Frame Buffer boards Summary: How are multiple monitors handled? Keywords: multiple videos boards Message-ID: <1990Dec5.212627.24551@csusac.csus.edu> Date: 5 Dec 90 21:26:27 GMT References: <1411@mpirbn.mpifr-bonn.mpg.de> <1990Dec5.165513.16570@eagle.lerc.nasa.gov> Organization: 12.5% by volume Lines: 58