Sdw Posted November 15, 2011 Share Posted November 15, 2011 The Sillyventure Atari demo party in Poland last weekend had a dedicated compo for 2600 demos. Four entries competed, but I've only been able to find three of them released online. 1st place: ISO by JAC! http://pouet.net/prod.php?which=58044 2nd place (my entry): Sphaera Stellarum by Noice http://pouet.net/prod.php?which=58034 3rd place: Minute and a Bit by Tjoppen http://pouet.net/prod.php?which=58038 Links contains both download to the ROMs and video recordings ready for viewing! 7 Quote Link to comment Share on other sites More sharing options...
GroovyBee Posted November 15, 2011 Share Posted November 15, 2011 Good stuff! Quote Link to comment Share on other sites More sharing options...
+Nathan Strum Posted November 15, 2011 Share Posted November 15, 2011 (edited) I love stuff like that! Very cool. The "Fullscreen Plotsphere" is amazing. Edited November 15, 2011 by Nathan Strum Quote Link to comment Share on other sites More sharing options...
+Gemintronic Posted November 15, 2011 Share Posted November 15, 2011 I think one of the requirements should be "works on real hardware". Also, I'm quite jealous of those coders that seem to allow multiple colors on the same playfield row Quote Link to comment Share on other sites More sharing options...
Thomas Jentzsch Posted November 15, 2011 Share Posted November 15, 2011 The "Fullscreen Plotsphere" is amazing. /signed Quote Link to comment Share on other sites More sharing options...
Thomas Jentzsch Posted November 15, 2011 Share Posted November 15, 2011 I think one of the requirements should be "works on real hardware". Also, I'm quite jealous of those coders that seem to allow multiple colors on the same playfield row Allow tracing in z26 (-tt) and enable it when the code you want to analyze what is currently displayed. Or use Stella's debugger. Or play with ALT+ZXCVBN while the demo is displayed. Together that should give you a pretty good idea how everything is displayed. How the display is setup outside the kernel is another story... Quote Link to comment Share on other sites More sharing options...
Sdw Posted November 15, 2011 Author Share Posted November 15, 2011 I think one of the requirements should be "works on real hardware". Also, I'm quite jealous of those coders that seem to allow multiple colors on the same playfield row All demos work perfectly fine on real hardware, I've run them personally using my Harmony cart. Quote Link to comment Share on other sites More sharing options...
Tjoppen Posted November 15, 2011 Share Posted November 15, 2011 (edited) Sadly, we're still missing an upload of "xSqueeker" (see http://pouet.net/res...ich=438&when=11 ). Perhaps we should pester the guy (Szuwarek) or Grey/MSB. And yeah, the demos do work on the real thing (mine at least). I remember clearly because I had to fix a VBLANK mistake to stop the screen scrolling (oops). Here's a short summary of how my effects work, in the hope of more/better future prods: Text scroller: Just a frame buffer drawn using an asymmetric playfield Twister: Mostly tables and clever use of the priority flag in CTRLPF. HMxx values are computed on the fly Rotozoomer: A one-line buffer (two bytes, GRP0/GRP1) computed on the fly, x and y coords accumulate dx and dy respectively and are compared to form each pixel. Optimization could have allowed 24 horizontal pixels I think Plasma: In each line, look up leftmost pixel in table and stick in COLUBK, then do 10x ADC #Imm + STA COLUBK, where the #Imms are modified during VBLANK (self-modifying code). Stagger and interlace for 22 horizontal samples Pinwheel: 768 bytes of bitmap data form eight frames of one quadrant of the shape, mirrored horizontally and vertically (sort of). The few cycles left over were enough for the greet graphics Edited November 15, 2011 by Tjoppen Quote Link to comment Share on other sites More sharing options...
+LS650 Posted November 15, 2011 Share Posted November 15, 2011 I've just run all three demos with jStella without any problems - I will probably look at them tonight on my 2600/Harmony. Very impressive work - though I can't help but think that this ability is being wasted on what are essentially pretty pictures when you guys could be making new games instead.... Quote Link to comment Share on other sites More sharing options...
Ben_Larson Posted November 16, 2011 Share Posted November 16, 2011 I love these demos. Makes me want to try one myself... not that I would be able to match this type of quality though. The plot sphere is especially impressive. I found myself saying "no way!" out loud on that part. 1 Quote Link to comment Share on other sites More sharing options...
Tjoppen Posted November 16, 2011 Share Posted November 16, 2011 xSqueeker is up: http://pouet.net/prod.php?which=58051 Quote Link to comment Share on other sites More sharing options...
Amstari Posted November 17, 2011 Share Posted November 17, 2011 I love these demos. Well done to everyone! It's great to see the 2600 doing things I never thought would be possible. I've got a folder on my Harmony Cart just for Demos now. Now I need to download some more from Pouet. Quote Link to comment Share on other sites More sharing options...
RevEng Posted November 17, 2011 Share Posted November 17, 2011 Agreed that these all were fantastic - well done guys! While watching them I was torn between trying to analyze how each effect was done, and just sitting back and enjoying the visuals and music... mission accomplished! Quote Link to comment Share on other sites More sharing options...
ZylonBane Posted November 17, 2011 Share Posted November 17, 2011 Can a 2600 port of Second Reality be far behind? Quote Link to comment Share on other sites More sharing options...
cruzer Posted November 25, 2011 Share Posted November 25, 2011 Seeing these got me motivated to restart some Atari 2600 hacking, which I first tried out about a year ago. Damn, it's fun to try coming up with ideas for effects on a machine that is this limited. So with a little luck, expect a Camelot demo soon. I need to find someone who can make a tune btw. Quote Link to comment Share on other sites More sharing options...
+JAC! Posted November 25, 2011 Share Posted November 25, 2011 I need to find someone who can make a tune btw. Welcome cruzer and you immediately found out what is the REAL limitation of the VCS :-) Quote Link to comment Share on other sites More sharing options...
cruzer Posted November 25, 2011 Share Posted November 25, 2011 Welcome cruzer and you immediately found out what is the REAL limitation of the VCS :-) Thanx, and I guess it's time to start playing around with random noises then Quote Link to comment Share on other sites More sharing options...
Ben_Larson Posted November 27, 2011 Share Posted November 27, 2011 Thanx, and I guess it's time to start playing around with random noises then It's dangerous to go alone. Take this: http://www.qotile.ne...music_guide.txt http://home.arcor.de...ts/freqform.txt 1 Quote Link to comment Share on other sites More sharing options...
R. Jones Posted December 2, 2011 Share Posted December 2, 2011 . . . The plot sphere is only GRP0 . . . I feel impressed . . . Quote Link to comment Share on other sites More sharing options...
ZylonBane Posted February 9, 2017 Share Posted February 9, 2017 Surprised there doesn't seem to be any mention around here of the Chiphead demo released at Silly Venture 2016 by Altair. It's a demake of Fairlight's Ziphead. Definitely one of the most impressive 2600 scene demos I've seen yet. And here it is live with audience reactions. 5 Quote Link to comment Share on other sites More sharing options...
Army Of 2600 Posted February 13, 2017 Share Posted February 13, 2017 This is absolutely awesome. Quote Link to comment Share on other sites More sharing options...
Kiwi Posted February 16, 2017 Share Posted February 16, 2017 Surprised there doesn't seem to be any mention around here of the Chiphead demo released at Silly Venture 2016 by Altair. It's a demake of Fairlight's Ziphead. Definitely one of the most impressive 2600 scene demos I've seen yet. And here it is live with audience reactions. The music in the Chiphead is really outstanding. Wow. Quote Link to comment Share on other sites More sharing options...
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