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Coke Zero - Revision 2015 Demo

Posted by Thomas Jentzsch , in Atari 06 April 2015 · 2,214 views

Demo Atari 2600 Coke Zero Revision 2015

A while ago I had some discussion with SvOlli about improving a part of his winning Bang! demo called "Snake Sprite". Initially he wanted to add more colors, but I thought more about removing the repositioning gaps. This seemed like something never done before inside a 48 pixel kernel, so I took the challenge.
 
After making it possible, SvOlli suggested to integrate my little demo into a bigger mega demo. So I spiced up the demo a bit, scripted it into 4 parts and added some pompous demo text scroller. Unfortunately the mega demo didn't make it, so we decided that it should stand by itself, now called Coke Zero (you will understand the name when watching it).
 
Since I have no talent for this, SvOlli contacted Skyrunner, a musician who would provide the necessary demo track. Space was very limited at that time, so it was quite a challenge for both of us to squeeze in the music. My part was optimizing for space and for that I improved Paul Slocum's old music player once again. Now it is fully customizable and even more space efficient than it was before. Skyrunner had the harder part, since he had to please me AND the space limitations. Posted Image
 
This Easter weekend the world's biggest pure Demoscene event Revison 2015 happened and Svolli and Skyrunner who both admitted the party (look out for SvOlli's seminars on YouTube and Skyrunner's other prod) submitted my little demo to the 4K Oldschool Intro competition. I have been watching much of the event via live streaming and saw some great demos. Today the Prizegiving event happened and to my big surprise, our little demo became 2ndPosted Image
 
You can find the binary and full source code in the attachment. Enjoy!
Video: 
http://www.dailymoti..._coke-zero_tech

Attached Files



  • Arenafoot , SpiceWare , Keatah and 9 others like this



Slick demo. Congrats on 2nd!
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Marc Oberhäuser
Apr 6 2015 10:48 AM

Cool :)

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Congratulations for demo and second place!

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Congratulations!

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Thomas Jentzsch
Apr 9 2015 10:08 AM

Video link added.

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Thomas Jentzsch - saving bits and impressing other Stella programmers since August 1999!

 

http://www.biglist.c...8/msg00090.html

    • Thomas Jentzsch and Cybergoth like this
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TheHoboInYourRoom
Apr 10 2015 4:18 PM

I love seeing new demo prods for the VCS! Very slick. :)

 

I tried making an NTSC build today so I could run it on my own Atari (all I did was set the PAL50 switch to 0 and NTSC to 1), but DASM aborted when I tried the assembly and reported ">CharTbl must be even!" in font.inc.

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Thomas Jentzsch
Apr 11 2015 12:59 AM

Yea, the NTSC support is not finished yet. I will look into this.

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TheHoboInYourRoom
Apr 11 2015 7:57 AM

Thank you.

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TheHoboInYourRoom
May 29 2015 4:44 PM

Is NTSC support any closer to being finished?

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Thomas Jentzsch
Jan 31 2016 7:37 AM

It took a while, but now I found the time and converted to demo into NTSC.

 

It was more work than it may look like, because I found a bug which had to be fixed for proper NTSC.

    • TheHoboInYourRoom likes this
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TheHoboInYourRoom
Feb 2 2016 11:59 AM

Amazing! Thank you very much!

 

This isn't a very big deal, but when I run Coke Zero (from the Harmony Cart menu) while my AtariVox is plugged in, the program sends it some spurious sound data that subsides after a few seconds.

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Thomas Jentzsch
Feb 2 2016 12:55 PM

No clue while this happens.

 

So I suppose you have to live with it (or unplug the AtariVox). :)

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TheHoboInYourRoom
Feb 2 2016 1:50 PM

(or unplug the AtariVox). :)

Yeah, that's what I did.

I'll take a look at the code sometime later and see if anything hinky is happening to SWACNT.

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Thomas Jentzsch
Feb 3 2016 4:22 AM

I do not set SWACNT to input, so maybe that's the problem. Though I never do that in my other games etc. too.

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