just 14 years passed by... HIP

[Heaven/TQA]

just came over one of the docs I have written back in those days... http://www.mathyvannisselroy.nl/hip_1.htm

 

I missed the 14th years birthday of HIP mode... or at least of the HIP FAQ...

Edited September 11, 2010 by Heaven/TQA

[Rybags]

Funny how that pixel shift went undetected/unused for so long.

 

Still... one of these days might have to start chasing that elusive Gr. 9/11 pixel shift (if it exists).

[Heaven/TQA]

well... the guys who have written APACVIEW would be the first ones who might came over that bug... because they combined 9+11 but it is so obvious to try 9+10 as well...and in that case you would realise it...

 

or what about all the demo coders? next "miracle" is that we used to combine 10+11 for RIP to get colored HIPs but it took time as well...

[Heaven/TQA]

and when Tamas & I played around in 1996 with that FX (ok... mainly Tamas) interesting that he did not tried to combine different modes... When moved last months I got his handwritten letters from Hungary and print outs of eMails (yeah... unix emacs edited emails... ) while we discussed all those topics. I am sure we mentioned colored HIPs but he did not find a good algorithm yet. So he improved his PC converter while I was playing around with mine.

 

Why do we call that "bug"? Because when Tamas & Co were writing Joyride Demo with the plasma (or it was the demo before) they realised that the Plasma fx look not 100% like they wanted to and they thought that the shifting was a "bug" caused by their DLI and timing code... but thank god they wrote done a note... otherwise I am not sure when this fx would have discovered.

 

But to be honest... Peter Dell and TLB who has written the "3rd" side of Overmind Demo discovered it, too in a way... TLB called that mode IMP as far as I remember.

 

Or Peter, can you remember when you were writing Visdom 2 Demo?

Edited September 11, 2010 by Heaven/TQA

[Heaven/TQA]

http://www.atariage.com/forums/topic/136827-visdom-i-ii-faq/

[Heaven/TQA]

ok... History needs to be rewritten.... Peter was prior "us"...

 

"Discovering the GTIA bug was a side effect of trying to find the exact timing for the rastersplits. Because the GR9 pixels were hard to distinguish on my old color TV, I used GR 10 with a flashing color/luminance during the development to find the correct split and missile position (see "braxtab"). But for half of the pixels the missle position wasn't correct when I ran the split with GR 9 afterwards. The investigation yielded what I called "ImpRes" (Impossible Resolution ) because it was just a fake based on a picture pattern with a very special layout.

 

I told TLB about my findings and he used the one pixel delay of "ImpRes" to let the convered version of Peachy's excellent snake picture look more natural in his part on the third disk of Overmind.

 

More next time, Peter/JAC!"

[flashjazzcat]

Very interesting reading. It would be nice to think there were still one or two more undiscovered secrets hidden in the hardware.

 

 

 

[Heaven/TQA]

yeah. still wondering... Slight was one of the talents in the polish scene 1993 and TLB used HIP for the first converted pictures and they never jumped on that FX in 3 years? Maybe Miker or Kaz have some memories of that time... because at Orneta 96 (ore 93?) demo party where Overmind was released the scene must have seen that IMP mode and then playing around... maybe at that time (1993/94) we all jumped on Mode9+ fx (see Asskicker demo by Shadows or my intro Really Unreal) and it got lost?

Edited September 11, 2010 by Heaven/TQA

[Heaven/TQA]

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Edited September 11, 2010 by Heaven/TQA