🚀 go-pugleaf

Juergen Fischer wrote:
> 
> Fabio Bizzetti (bizzetti@mbox.vol.it) wrote:
> 
> : >if i
> : >understand correctly, the PAL (european) version also had an extended (i.e.
> : >kludged tweaked :) resolution of 320x240.
> 
> : nope.. C64 was only 320*200/160*200 (not counting -8 for scrolling case).
> 
> If I remember right there was a trick that let border disapear so
> VIC went on displaying => more than 200 lines.

Well as I remember it you turned the scrolling case on and off on the rasterline
there the border was supposed to begin.
This way you could have sprites in the border and one byte copied in a line
of 40 on each row in the border. With that char you could do a vertical scroll.
The total number of lines could have been about 240 depending on your
TV set.
You could even put sprites in the right and left border but that was alot
harder and demanded a more exact timing. The method was almost the same but to do
this you had to fiddle with the borders that was present to do smoothscrolling
with the $DO16 register.

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 / Jonas Elfstrom       (5+ rows .sigs sux)       jonas@plea.se  \
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