Mode Infinity by CRTC
screenshot added by puppeh on 2013-09-08 19:54:20
platform :
type :
release date : september 2013
release party : Sundown 2013
compo : oldskool demo
ranked : 1st
  • 16
  • 6
  • 0
popularity : 58%
  • 0.73
alltime top: #6779
added on the 2013-09-08 19:54:20 by puppeh puppeh

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added on the 2013-09-08 19:58:02 by CHEF-KOCH CHEF-KOCH
Hi! [spoilers, haha] Mode infinity doesn't exist of course, but this demo does contain (I think) one effect that I don't think has been done before -- full-colour dithering in 640x256 mode 0 (the second demo part), actually a 2-colour mode. The screen bytes are static and the palette is switched 128 times per frame -- I'll leave figuring out the exact details of how several distinct dither patterns can be displayed using the same screen contents as an exercise to the reader :-). The projector didn't handle the dithering too well during the compo, unfortunately!

The "other" feature of mode infinity -- parallax scrolling -- is a combination of palette switching and the "vertical rupture" technique well-known in the CPC scene, together with a split mode for the scroller at the bottom. The final picture is plain mode 1.

The tune was losslessly compressed from a 96kb .vgm file into about 14kb using a custom compressor tool written specially for the demo.

Just in case you were wondering what all the fuss was about. HTH!
added on the 2013-09-08 20:29:04 by puppeh puppeh
Thanks for the explanation pup!
rulez added on the 2013-09-08 20:31:45 by Deltafire Deltafire
g∞d job pup!
rulez added on the 2013-09-08 20:41:59 by tunk tunk
Any recommended emulators?
added on the 2013-09-08 21:06:33 by すすれ すすれ
video please? :D
rulez added on the 2013-09-08 21:33:58 by Optimus Optimus
@ggn: Use B-em V2.2 in BBC Master 128 mode (Settings/Model/BBC Master 128). Then go to "Disc/Autoboot disc :0/2" and select the demo file.

Emu: http://b-em.bbcmicro.com/
added on the 2013-09-08 21:48:08 by ramon ramon
Really nice to see more BBC micro demos been made. I didn't realise it could achieve such effects compared to more popular 8-bit machines.
Big thump up!
rulez added on the 2013-09-09 10:55:48 by conrad conrad
hahaha, i thought you actually had found some undocumented new screen mode :D Didn't expect that the beeb could do things like this, so it kind of made sense!

Dunno what it would have looked like without projector issues, but it actually looked great on the big screen.
rulez added on the 2013-09-09 11:04:35 by psonice psonice
Thanks puppeh for another bbc micro demo-)
rulez added on the 2013-09-10 13:04:51 by megmeg megmeg
I think it's nice
rulez added on the 2013-09-10 15:03:19 by aki aki
I don't know anything about the hardware and the picture and the parallax scroller are nice, but as a whole I didn't find this really interesting. The presentation leaves a lot to be desired.
added on the 2013-09-10 15:14:39 by Preacher Preacher
it always sounds dirty and I fucking like it.
rulez added on the 2013-09-10 15:29:50 by dv$ dv$
I love the pace too.. well rounded prod.
added on the 2013-09-10 15:31:27 by dv$ dv$
BBC Micro
rulez added on the 2013-09-10 15:48:57 by Xyl2k Xyl2k
that dithered colour cycling looks awesome, great job puppeh!
rulez added on the 2013-09-10 16:53:37 by keito keito
To infinity… and beyond!
rulez added on the 2013-09-11 10:21:41 by moqui moqui
platform and smoothness!!
rulez added on the 2013-09-11 16:53:23 by Fell Fell
Nice effects but too many colours. Never expected to see MODE 0 do that! Very smooth. I also like the beep at the start and the music which follows.
rulez added on the 2013-09-11 21:16:17 by jt77 jt77
Great effect and phenomenal tune! :)
rulez added on the 2013-09-12 21:42:32 by doz doz
That parallax effect at the start was great, I think you need to know a little about the hardware to appreciate (what looks like) 8 colours in normally 2-colour mode 0! Not sure how it was done, but I guess it took some fancy timing and hacking of the display start addr to get the dithering right.

Sorry I was on a boat in deepest, disconnected Wales and couldn't get a backup tune out for you guys or make it to Sundown, seems you made do with an existing tune? I know what a bastard composing for the beeb's PSG is after The Master of Your Old School, the clock speed isn't supported by any tools and additive pitch shifting in the tracker doesn't help with that - the frequency vals in the VGM need to be multiplied by some scaling factor to account for the clock difference. Ugly :S
rulez added on the 2013-09-15 22:02:50 by Claw Claw
rulez added on the 2013-09-16 22:09:18 by Chainsaw Chainsaw
Forgot to say, the dithering was very nice too. :P
added on the 2013-09-23 00:34:47 by jt77 jt77

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