Newsgroups: comp.sys.amiga.hardware
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!peck
From: peck@ral.rpi.edu (Joseph Peck)
Subject: Re:  Idea: New graphics modes (30hz/25hz like current 60/50)
Message-ID: <+b_h#c_@rpi.edu>
Nntp-Posting-Host: ral.rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy NY
References: <jq9g78l@rpi.edu> <ronald.3464@ecl014.UUCP> <mmm.1195@reaper.Chi.IL.US>
Date: 14 May 91 15:19:07 GMT
Lines: 55

In article <mmm.1195@reaper.Chi.IL.US> mmm@reaper.Chi.IL.US (Michael Marvin Morrison) writes:
>In article <ronald.3464@ecl014.UUCP> ronald@ecl014.UUCP (Ronald van Eijck) writes:
>>In article <jq9g78l@rpi.edu> peck@ral.rpi.edu (Joseph Peck) writes:
>>>
>>>     I found some time on my hands last week, so I got to thinking about
>>>new video modes for the Amiga.  My thoughts ran along these lines:
>>>
>>>     Why not take this reduction in frequency a step further, and
>>>offer a 30hz/25hz mode.  This would provide a 400/512 non-interlaced
>>>signal and a 800/1024 interlaced signal.  Now obviously this wouldn't
>>>work on my 1080, but (demonstrating my lack of video display knowledge)
>>>wouldn't this work on a multisync?

[stuff]

>
>The 2024 monitor does something similar to this, as it has 15hz and 10hz display
>modes.  Although it plays some funky games with the signal, as it is sent out
>something like this:
>
>       __________________________
>      |               |          |
>      |               |          |
>      |   640x400     | 368x400  |
>      |              1|         2|  == 1008x800
>      |_______________|__________|
>      |               |          |
>      |               |          |
>      |   640x400     | 368x400  |
>      |              3|         4|
>      |_______________|__________|
>
>And the monitor takes care of putting it back to normal via hardware.  The 2024
>screens are non-dragable also.  It was very sharp (although sorta liquid like)
>and a 5x7 font looked just fine.  Now let's see.. using some kind of "supreme
>persistance" monitor, we could half this for maybe 1008x1200 (adding another
>set of screens to the bottom) or maybe 1280x1200 at 1 (hert? :-) using 6 sets of
>640x400 screens.  But then again, that would only give us a max of ~256x171 text
>resolution in a shell (using 5x7 font) or a mere 21 80x24 size windows open. :-)

So is the A2024 monitor something made especially for Commodore?  Or is
there a hardware do-hickey that does all of the interfacing with a 
standard monitor?

If Commodore can have monitors made for them, it seems like my initial
idea is a fairly valid method of providing for (whatever) x 800 modes.

> 
>--
>Michael M Morrison              /|                             |\
>mmm@reaper.chi.il.us <or>      | |  Cash, for Cache..          | |
>reaper!mmm@miroc.chi.il.us      \|         Hmm.. sounds fair.  |/

Joe Peck
peck@ral.rpi.edu
