[hatari-devel] Videl changes

Miro Kropáček miro.kropacek at gmail.com
Sat Feb 5 23:25:17 CET 2011


> I Just have a question : is it possible to change the HBB and HBE (border
> begin and border end) registers in the middle of the screen (HBL change) or
> is it just taken into account by the Videl during each VBL ?
>
> Same question for other parameters (horizontal and vertical parameters) ?
>
Hey, are you kidding, what a lame hardware Videl would be without this ;-)
Of course you can change all parameters on the fly, screen base is notable
exception (same as on ST/E).


> I know I can change the palette at any time in the screen (raster effect),
> but can I have a upper screen in overscan and a lower screen with borders
> for example ?
>
Yes, sure. And not only that, you can have also different resolution (8bpp
vs truecolor) in that way. In a way it reminds me Atari800's ANTIC.

-- 
MiKRO / Mystic Bytes
http://mikro.atari.org
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