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From: cem@intelca.UUCP (Chuck McManis)
Newsgroups: net.micro.amiga
Subject: Re: Resolution and Flicker - Rumors/Solutions
Message-ID: <135@intelca.UUCP>
Date: Tue, 29-Oct-85 11:57:49 EST
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Posted: Tue Oct 29 11:57:49 1985
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> Talking to the local Amiga dealer, he stated that given the right monitor
> to drive it, the Amiga could be programmed to run in very high resolution.
> The numbers quoted were 1280x1024 interlaced.  Can anybody confirm this?
> 
> Could the Amiga change from the NTSC "Crawling Interlace" that causes the
> high-res flicker, to a 70HZ and a 262.5 (rather than 262.525) scan rate?
> This appears to be the way the ATARI gets it's high res (It doesn't flicker,
> but it's monochrome)?  The natural persistance of the Phosphor seems to hide
> flicker unless you look very very close (1" with a magnifying glass).

Assuming you could bypass the NTSC junk, there are two things that affect the
need to use interlace. 1] The monitor must support "n" lines where "n" for the
amiga would probably be 600 (400 displayed, 100 on top and bottom) and 2]
bus bandwidth/scan rate. Meaning that to display all of those pixels on the
screen in one frame the hardware has to be able to shove them out the interface
at ~8 Mbytes /second (assuming 4 bit pixels in a 600 X 400 frame) 

The question is for anyone (especially the amiga folks) if the custom chips
are capable of this sort of rate. And if so should I be saving my pennies for
a very expensive RGB Hires monitor? 

--Chuck
-- 
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 {ucbvax,hao}!hplabs/                     friends, or my avocado plant. :-}