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- Path: erinews.ericsson.se!usenet
- From: Jonas Elfstrom <jonas@plea.se>
- Newsgroups: comp.sys.ibm.pc.demos,alt.sys.amiga.demos,comp.sys.amiga.graphics
- Subject: C64 magic. was: Re: Strange graphic modes..
- Date: Wed, 17 Apr 1996 16:53:25 +0000
- Organization: PLEA http://plea.se/
- Message-ID: <31752205.9C2@plea.se>
- References: <31715D6E.53E@nmsu.edu> <1322.6680T65T2494@mbox.vol.it> <4l18o2$btf@sunsystem5.informatik.tu-muenchen.de>
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- 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.
-
- --
- / Jonas Elfstrom (5+ rows .sigs sux) jonas@plea.se \
- \ We are here to PLEAse you. +46 19 322010 http://www.plea.se/
-