From: skip@tacky.cs.olemiss.edu (Skip Sauls)
Subject: Re: Interlace video (Was Re: PC (OS/2) / Amiga debate)
Organization: University of Mississippi, Dept. of Computer Science
Date: Tue, 8 Sep 1992 17:30:18 GMT

In article <1992Sep8.152546.26666@ctr.columbia.edu> jerry@connection.prospect.com (Jerry Shekhel) writes:
>raymondu@terapin.com (Raymond Ulibarri) writes:
>>
>>BTW, I agree with the remark that PC displays look blocky.  Look at
>>AutoDesk's Animator demo FLI animation.  It appears quite blocky.  When 
>>viewing the same animation (after converting it to Amiga ANIM format) on 
>>an Amiga, it doesn't appear blocky at all.  I suspect it's the non-interlace
>>monitor that enhances the blocky appearance on the PC, and the interlaced 
>>video of the Amiga which disguises it.  Any facts to prove this?
>
>No, I believe that 320x200 VGA looks blocky because the video card is 
>actually double-scanning the display to 400 lines.  Each pixel is actually 
>a 2x2 square, so they have corners and edges which are easy to see.

The A3000's flicker-fixer does the same thing, hence many graphics that
look pretty good on a 108x end up looking blocky on a VGA or multisync.
Most, if not all, VGAs and SVGAs can be "tricked" into 320x400 mode, with
"overscan" up to around 360x480.  Also, the 320x400 mode allows for two
video pages, making smooth animation possible.  I've been programming the
VGA for a while now and wonder why so few games, demos, etc. take 
advanatage of the extra resolution.

>>Raymond Ulibarri

>+-------------------+-----------------------+--------------------------------+
>| Jerry J. Shekhel  | Molecular Simulations | Time just fades the pages      |
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