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Path: utzoo!watmath!clyde!bonnie!akgua!mcnc!ecsvax!mjg
From: mjg@ecsvax.UUCP (Michael Gingell)
Newsgroups: net.micro.amiga
Subject: Re: Amiga with a small monitor? -- (A fix for crummy text)
Message-ID: <661@ecsvax.UUCP>
Date: Thu, 31-Oct-85 09:25:32 EST
Article-I.D.: ecsvax.661
Posted: Thu Oct 31 09:25:32 1985
Date-Received: Sat, 2-Nov-85 06:17:50 EST
References: <213@telesoft.UUCP> <613@sftig.UUCP>
Organization: North Carolina Educational Computing Service
Lines: 24

> 
> Has anybody tried looking at 640x200 text with a 'scan-doubler' (which
> replicates each line in the first half-frame into the line immediately
> below it in the second half-frame.)?  I'll bet that the text and icons
 ........
> 
> Rick Thomas
> ihnp4!attunix!rbt

A scan doubler for the Amiga is not such a trivial matter as on the
IBM PC. There the RGB etc. signals are digital and can be stored
in a simple memory scheme for repeating the line. This is how the
Princeton Graphics Scan DOubler board works on the PC giving a very
nice looking 31.5 kHz scan rate.

On the Amiga the video output is analog RGB, that's the only way
you can get so many colors. So a scan doubler would have to have a
method of storing a line in analog form. No easy matter.

There is a digital RGB output port on the Amiga but I don't know
if anyone uses it. If they did they would have to use a non-Amiga
monitor and would lose the color range.

    - Mike Gingell   ...decvax!mcnc!ecsvax!mjg