ISO by JAC! [web] & Jakub Husak
screenshot added by JAC! on 2011-11-14 15:26:10
platform :
type :
release date : november 2011
release party : Silly Venture 2011
compo : console demo
ranked : 1st
related :
  • rulez 69
  • is ok 4
  • sucks 0
popularity : 0%
  • rulez 0.95
alltime top: #1202
added on the 2011-11-14 15:26:10 by JAC! JAC!

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>>> ISO by JAC! <<<

An 8k demo for the Atari 2600.

Code and graphics by JAC!, sound by Jakub Husak.

This is my second Atari 2600 demo and it was a tough journey. Anybody who thinks retro coding is simple should give this machine a try.

I wanted to create a demo which is different from existing "typical VCS" demos which tend to use full screen effects at low resolutions without transitions but with HMOVE artifacts on the left side of the screen. I wanted to establish the classical logo/playfield/credits screen layout from the good old days of the cracktros and Amiga intros. Ironically, on VCS this is much harder than full screen effects :-) I wanted to create smooth effects which appear to be in multicolor hires resolution on a machine with 21 bits of screen RAM and 8+8+1+1+1 movable pixels. I also wanted as many effects as possible in 8k with a fast pace and proper transitions. The complete lack of interrupts makes the last one especially hard and expensive in terms of RAM and ROM usage.

I'm fucking proud of the result and I hope you like it a bit, too. See the .nfo for the technical details of the effects

- ISO Logo
- Floating and Falling Text Tiles
- Ribbon
- Plasma
- Twist
- Twirl
- Scroll

Thanks to:
- Grey/MSB for organizing Sillyventure and being so crazy as to start a VCS demo compo
... and for stretching the deadline
- Jakub Husak for the great tune
... and the player additions .. and keeping the deadline ... eventually :-)
- d-wilson for finding the article on "Why 2:16 minutes" again
... though the demo now takes 3:31 in the end. I had too many effecs :-)

Greetings and respect to:
Noice (cool ideas), Trilobit (cool stories), Tjoppen (cool execution) and all people at Sillyventure - one day I'll be there, too.

The download contains the 8k ROM together with Stella32/64 ready to run. Here's also a video but I recommend emulator or the real machine with Harmony card. it simply looks best there to due the low resolution and high FPS.
added on the 2011-11-14 15:28:05 by JAC! JAC!
nice! the VCS2600 scene is strong :D
added on the 2011-11-14 15:32:39 by rez rez
nice effects
rulezadded on the 2011-11-14 15:38:36 by noby noby
I love it !!!
rulezadded on the 2011-11-14 15:38:52 by Tomchi Tomchi
I dislike the "introduction - effect - introduction - effect"-structure, but the content is excellent.
rulezadded on the 2011-11-14 15:42:47 by Preacher Preacher
Absolutely amazing! I do not have a slightest idea how many times you were scratching your head JAC!, but your stuff were applauded many times during the compo!!!

If you wanna go to SV next year, we must support Grey! He did SUCH A GREAT job ALONE(yes!!) that I dare to say I have never ever seen such a dedicated and motivated dude working ALONE...

But it is not the place to talk about it.
Once again, a worthy winner of first ever in the Polish scene history Atari2600 competition!!!
rulezadded on the 2011-11-14 15:44:18 by sim sim
good intro
rulezadded on the 2011-11-14 15:52:52 by psndcj//tbk psndcj//tbk
Wow, very nice vcs demo! Many effects, nice writer, cool sound.
rulezadded on the 2011-11-14 16:14:57 by Optimus Optimus
16:54 < bittin`> best 2600 demo i seen
rulezadded on the 2011-11-14 16:47:53 by Princess_Luna Princess_Luna
rulezadded on the 2011-11-14 16:50:46 by earx earx
rulezadded on the 2011-11-14 17:30:15 by zerkman zerkman
Not a big fan of the demo's pacing, but the fx are outstanding.
rulezadded on the 2011-11-14 17:39:16 by すすれ すすれ
very very successful!!! adding a shadow to the twister is a really great idea. after reading the paragraph above starting with "I wanted to create ..." and watching the demo, I can easily say that you've done what you wanted to do really well. :)
rulezadded on the 2011-11-14 17:54:20 by Skate Skate
Very nice.
The pacing could have been a little better. I like the way the text is done and using the ball to give the twister a shadow. The music is also pretty good. My plasma remains undefeated though :)
A worthy winner overall (haven't seen the compo results yet - I'm taking sim's word)

In the future please don't use AUDCx=4 and AUDFx=0 for silence. This creates an annoying high-frequency beep around 15 kHz in both MESS and Stella. I'm not sure what happens on real hardware yet, but I suspect the same.

For the folks lacking emulators:
YouTube via JAC!'s channel
YouTube via my channel - better audio (I hope you don't mind)
rulezadded on the 2011-11-14 19:17:57 by Tjoppen Tjoppen
Lovely blocky visuals and technological improvements, the music was just okay.
rulezadded on the 2011-11-14 19:42:49 by visy visy
rulezadded on the 2011-11-14 20:05:12 by Gmitts Gmitts
Design on 2600, enormous thumb up!
rulezadded on the 2011-11-14 20:58:35 by Nitro/Black Sun Nitro/Black Sun
skills, yes.
style? not yet.
added on the 2011-11-14 21:17:53 by knl knl
I haven't see many 2900 demos, but this is truly amazing, great job!
I want to run it on the real hardware someday.
rulezadded on the 2011-11-14 21:22:08 by frag frag
rulezadded on the 2011-11-14 21:29:50 by micdune micdune
Massive amount of content in this one, good stuff!
rulezadded on the 2011-11-14 22:11:07 by Sdw Sdw
As you say, it's probably hard to code on this compy... But you bring us this brilliant demo, moreover with very good design. I especially like the falling fonts' blocks, the twister and the screx.
Well done! :)
rulezadded on the 2011-11-14 22:13:23 by baah baah
rulezadded on the 2011-11-14 22:18:08 by Alpha C Alpha C
i never thought that atari 2600 could ever produce such effects. insane!
rulezadded on the 2011-11-14 22:31:34 by v3nom v3nom
oh, and such a nice packaging with pre-configurated emulator n stuff! <3 sweet
added on the 2011-11-14 22:33:20 by v3nom v3nom
My mouth runneth over O_O
rulezadded on the 2011-11-14 22:43:33 by d0DgE d0DgE
rulezadded on the 2011-11-14 22:48:23 by Buckethead Buckethead
rulezadded on the 2011-11-15 01:14:58 by rez rez
cool, you made it ;) kicks ass
rulezadded on the 2011-11-15 01:46:39 by Premium Premium
great! I have to make a cart with that :)
rulezadded on the 2011-11-15 01:49:49 by krupkaj krupkaj
Absolutly 'have to see'.

Good concept, great effects, lovely music!
rulezadded on the 2011-11-15 06:34:39 by dhor dhor
very, very nice stuff (=
rulezadded on the 2011-11-15 06:44:34 by sensenstahl sensenstahl
Nice production! great piece of code! Congratulations! :D
rulezadded on the 2011-11-15 10:57:58 by seban seban
congrats Jac! ! It was a real pleasure to watch this demo on SV. Other demos were amazing as well, but not so long and complex . It makes me wanna buy Harmony cart and 2600 and start coding on this machine. Thanx
added on the 2011-11-15 11:20:17 by gorgh gorgh
sorry, thumb up
rulezadded on the 2011-11-15 11:42:12 by gorgh gorgh
VCS scene rulez ! Excellent demo !
rulezadded on the 2011-11-15 14:06:04 by hylst hylst
rulezadded on the 2011-11-15 14:14:49 by HerrV HerrV
very good :)
rulezadded on the 2011-11-15 14:16:24 by tobé tobé
The music was awful but the graphics and effects were nice!
rulezadded on the 2011-11-15 17:14:50 by Exin Exin
Excellent! Great effects (twister looks ace!) and I also like the tune, best VCS2600 tune I heard to far! :)
rulezadded on the 2011-11-15 18:30:58 by StingRay StingRay
rulezadded on the 2011-11-15 20:19:53 by CiH CiH
Ruled heavily.
rulezadded on the 2011-11-15 20:25:35 by pmc pmc

... don't use AUDCx=4 and AUDFx=0 for silence. This creates an annoying high-frequency beep around 15 kHz in both MESS and Stella.

Perfectly right, fixed in V1.1 and all linked downloads (bin/src/video) now. Check the end of the ROM to see which version you have.

I was baffled when I found out here that I cannot hear anything beyond 14 KHz anymore. 39 years - too old or just too many demo loud parties? I can only hope that Jukub does not complain that I ruined the roughness of his tune now :-)
added on the 2011-11-15 21:02:54 by JAC! JAC!
love it
rulezadded on the 2011-11-15 21:48:28 by Shazz^TRSi^MJJ Shazz^TRSi^MJJ
rulezadded on the 2011-11-15 22:00:34 by BackSpace BackSpace
rulezadded on the 2011-11-16 10:01:19 by provod provod
Atari 2600? Isnt that the crappy console?
Anyway, i like the scroller and the textwriter most in this one!
rulezadded on the 2011-11-16 19:56:14 by CONS CONS
rulezadded on the 2011-11-16 20:52:04 by ltk_tscc ltk_tscc
Pixels as huge as whole icons, my ears bleed from the sound.. hmm.. must be VCS! =)
rulezadded on the 2011-11-16 21:05:23 by wysiwtf wysiwtf
rulezadded on the 2011-11-17 17:08:09 by UKKO UKKO
nice a2600 demo!
rulezadded on the 2011-11-18 05:08:10 by Kojote Kojote
Great demo!! I'll get that music tool out soon for you. In fact you can have it as is if you don't mind that some of the parameters don't save / load (you just have to keep track of them in notepad)
rulezadded on the 2011-11-18 08:11:45 by cTrix cTrix
high quality stuff, especially liked the new gfx mode
rulezadded on the 2011-11-18 11:27:51 by cruzer cruzer
>Atari 2600? Isnt that the crappy console?
C'mon - a wooden box with 128 bytes of RAM is not crappy - At least is was not in 1977 :-) I've created a label and am planning to create some real carts with this so people can put it into the real thing or shelve it. So if you are interested, just drop me a mail. Maybe we can get some discount from AtariAge then.

BB Image

@cTirx: Thanks!
added on the 2011-11-18 15:48:29 by JAC! JAC!
rulezadded on the 2011-11-18 17:08:15 by sub sub
This is really great - my favourite 2600 demo ever, actually. Awesome work JAC!
rulezadded on the 2011-11-18 18:48:18 by t-zero t-zero
Not bad.
added on the 2011-11-19 20:10:17 by AntDude AntDude
knl: 2900?
added on the 2011-11-19 20:10:47 by AntDude AntDude
Nice to see the finished version :)
congratz on 1st place!
rulezadded on the 2011-11-19 20:37:36 by insane insane
BB Image?
added on the 2011-11-20 16:34:58 by cruzer cruzer
rulezadded on the 2011-11-22 21:17:06 by lachose1 lachose1
A little bit weak for such a powerful machine!
I will program that nearly as good on my i5 PC in only one month! ;-)))
rulezadded on the 2011-11-23 15:03:54 by Tigerduck Tigerduck
Man, this covers such a wide range of well done effects it's hard to believe! Love it!
rulezadded on the 2011-11-23 18:20:51 by Paranoid Paranoid
Up for the machine!
rulezadded on the 2011-11-27 22:23:00 by RaHoW RaHoW
rulezadded on the 2011-12-01 22:24:12 by ԹHΞΞ ԹHΞΞ
Superb! best prod on SillyVenture
rulezadded on the 2011-12-03 17:09:14 by Atarik Atarik
wow, kewl shit!
rulezadded on the 2011-12-10 17:36:50 by ɧคɾɗվ. ɧคɾɗվ.
Great...love it
added on the 2011-12-13 02:13:18 by a.-t- a.-t-
rulezadded on the 2012-03-06 22:16:40 by PulkoMandy PulkoMandy
Great effects and design.
rulezadded on the 2012-10-20 13:49:57 by zbyndek zbyndek
rulezadded on the 2012-10-20 13:53:07 by aegis aegis
rulezadded on the 2012-10-23 01:51:19 by stijn stijn
rulezadded on the 2012-10-28 22:19:52 by Saga Musix Saga Musix
W T F!
How did i miss that?
rulezadded on the 2012-11-06 18:36:12 by toxie toxie
Poah nice, thanks for bringing this up. Totally missed this, too. xD
rulezadded on the 2012-11-06 19:22:14 by elend elend
I got multiple requests from people who'd like to run the demo in a loop on presentation hardware. Hence I freed some more bytes and made it restart 10 seconds after the end.

I will order another bunch of real labeled cartridges for this. If you are interested in a cartridge, just send a mail.
added on the 2012-12-19 20:10:20 by JAC! JAC!
Excellent ! :)
rulezadded on the 2012-12-19 23:28:52 by Templeton Templeton
my prefered VCS demo.... perfect design !
Horrible colours in some screens, but the effects themselves are very good! I also like the retro screen outlay. Very nice!
rulezadded on the 2014-05-17 08:42:57 by Kylearan Kylearan
rulezadded on the 2014-07-03 22:46:40 by las las
Excellent demo! Lots of effects for just 8K.
rulezadded on the 2015-04-12 18:20:45 by JTZ JTZ

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