🚀 go-pugleaf

In article <92231.132430IP25179@portland.caps.maine.edu> <IP25179@portland.caps.maine.edu> writes:

>  I just downloaded and watched the Cascada demo CRONOLOGIA (1991: can be
>  found at saffron.inset.com).  Now that the desire to slit my wrists has
>  passed ( ;)  It's a great demo, folks -- very depressing for a beginning
>  PC graphics programmer; though it's nice to know one *can* do such things)

Yes. It is tryly a very great demo. I saw it first time in a large demo
party in sweden. The Cascada group was showing there their demos and also
coding. Unfortunately the cronologia demo did not work very well in the 
ICL computers they were using for showign their demos. The picture was
disorted in some way.

>  I was under the impression that the physical size of the written-to screen
>  was hardware controlled.  This is obviously erroneous given that the Cascada
>  folks not only make it large enough to have sprites go off the physical top

There is some hardware control, but most of the functions in VGA card are
user programmable in register level. It is possible to change scan, beginning
and ending line of screen, sync pulses, etc. The effect is combination of
some changes in VGA registers. I think that screen start and end are changed,
maybe also scan rate.

>  contrast all the way up, so you can see even the 'black pixel' scan-lines).
>  So, the question:  Anyone want to speculate on how they did it?  My mind
>  just boggles at the thought.

I speculated about different programming and hardware topics with their
main programmer (he was only 16). I get some very interresting information,
but he did not want to tell all his programming secrets.

--

Tomi.Engdahl@hut.fi            "Don't force it; get a larger hammer"
then@vipunen.hut.fi