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The Icon Bar: General: Some demos ported
 
  Some demos ported
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Markku Reunanen Message #110786, posted by Marq at 22:20, 2/8/2009
Member
Posts: 11
I've just ported four demos to StrongARM-based RiscPCs. All of them are available here on the Productions page: http://www.kameli.net/fit/

Tested under rpcemu and Risc PC 700. Some more might be coming up when I find the time and motivation. 2-3 other productions might be doable, let's see smile
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Jason Togneri Message #110787, posted by filecore at 08:15, 3/8/2009, in reply to message #110786

Posts: 3867
Woo, Acorn scene demos. It's like 1996 all over again!
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Richard Goodwin Message #110796, posted by rich at 19:31, 3/8/2009, in reply to message #110787
Rich
Dictator for life
Posts: 6828
Woo, Acorn scene demos. It's like 1996 all over again!
Can you smell the irony of that statement on a RISC OS forum?
________
RichGCheers,
Rich.
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Jason Togneri Message #110800, posted by filecore at 19:53, 3/8/2009, in reply to message #110796

Posts: 3867
Woo, an active (and on-topic) RISC OS forum. It's like 1996 all over again!
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Phil Mellor Message #110808, posted by monkeyson2 at 12:43, 4/8/2009, in reply to message #110786
monkeyson2Please don't let them make me be a monkey butler

Posts: 12380
I've just ported four demos to StrongARM-based RiscPCs. All of them are available here on the Productions page: http://www.kameli.net/fit/

Tested under rpcemu and Risc PC 700. Some more might be coming up when I find the time and motivation. 2-3 other productions might be doable, let's see smile
We should put this whole thread in a marquee tag. smile

Got any screenshots?
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Jason Togneri Message #110809, posted by filecore at 13:39, 4/8/2009, in reply to message #110808

Posts: 3867
There's something approaching a screenshot if you click on the small square preview icon of each file, but it's not much.
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Martin Bazley Message #110813, posted by swirlythingy at 16:18, 4/8/2009, in reply to message #110786

Posts: 460
I've just ported four demos to StrongARM-based RiscPCs. All of them are available here on the Productions page: http://www.kameli.net/fit/
I can confirm all four of them work on an Iyonix, but Stercus and Hex Pistols disagree with the monitor definitions (the screen comes out twice as wide as it should do, resulting in two copies of the picture featuring alternate lines) - this may or may not be fixed with Aemulor Pro.

Also, Hex Pistols plays twice as slowly as it should do, including the music - which is quite an interesting experience!
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Markku Reunanen Message #110815, posted by Marq at 17:45, 4/8/2009, in reply to message #110813
Member
Posts: 11
Thank you for testing smile I have no Lyonix around (maybe closer than 1000 kilometers...) so it's a bit difficult to test. IIRC Stercus and Hex Pistols run in 32-bit color and the rest in 8-bit, which might explain some of the behavior. Hexp uses the same mod player as the rest so the slowdown can't be explained easily. I too had to tweak my monitor prefs to get decent 320x256 out. Sorry about that, but 640x480 was just too slow and 320x256 seems to be the only common lowres mode with a correct aspect ratio - most of the prods were originally made for AGA Amigas.
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Jason Togneri Message #110816, posted by filecore at 18:04, 4/8/2009, in reply to message #110815

Posts: 3867
Sounds like it's de-interlaced itself. Try adjusting your monitor.
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Blind Moose Message #110851, posted by Acornut at 22:53, 6/8/2009, in reply to message #110813
Acornut No-eye-deer (No Idea)

Posts: 487
...four demos at .....http://www.kameli.net/fit/
I can confirm all four of them work on an Iyonix,....
A9home (Os 4.42) runs them too, unaltered, in auto monitor config.
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Markku Reunanen Message #110916, posted by Marq at 18:44, 13/8/2009, in reply to message #110786
Member
Posts: 11
One port more: Megademo IV 2 by Artwork
Available here: http://ftp.kameli.net/pub/fit/ports/mdiv2_riscos.zip

Requires some 20M memory and 320x256x15b mode
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Paul Stewart Message #110930, posted by sa110_mk at 18:23, 14/8/2009, in reply to message #110786
Member
Posts: 144
Whilst all the ported demos mentioned sofar on this list work fine on my A9home (thanks Markku for porting them), I can't help wondering what a new native demo would look like.

I don't think there has been any native demo released on RISC OS to work exclusively on the A9home and Iyonix. Is there anyone out there who is up to the challenge of creating a new native RISC OS demo? Something to keep us ticking over for the next few years.
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Jeffrey Lee Message #110936, posted by Phlamethrower at 20:08, 14/8/2009, in reply to message #110930
PhlamethrowerHot Hot Hot Hot Hot Hot Hot Hot Hot Hot Hot Hot Hot stuff

Posts: 15100
I don't think there has been any native demo released on RISC OS to work exclusively on the A9home and Iyonix. Is there anyone out there who is up to the challenge of creating a new native RISC OS demo? Something to keep us ticking over for the next few years.
I think part of the problem with the demo scene (or lack of) is that it takes a lot of time and skill to create a demo that will impress the viewer. This is especially true now that most people are used to seeing whizz-bang 3D accelerated graphics on other platforms. Creating a demo for a Cortex-A8 could be interesting because there'll be so much extra power available to play with, but creating one for an Iyonix/A9home may just be an exercise in masochism due to the lack of floating point and the inferior caches/memory buses (particularly the slow speed of writing to PCI RAM on the Iyonix) The Cortex-A8 isn't perfect either (I hear there are some nasty pipeline stalls you've got to watch out for with the VFP/NEON instructions), but it will be a much better starting point if you want to create something that has the chance of impressing someone.
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Eric Rucker Message #110942, posted by bhtooefr at 02:21, 15/8/2009, in reply to message #110936
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Posts: 337
That said, demos for retro machines manage to be mindblowing, especially when given the constraints of the system. There are people doing ridiculously impressive things with half the power of a BBC, let alone an Iyonix.
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Markku Reunanen Message #111033, posted by Marq at 22:07, 18/8/2009, in reply to message #110916
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Posts: 11
Led Blur by Mindlapse is the latest port. Let's see what more is to come smile 320x256x32b, StrongARM etc. required. Tested under RPCEmu, RPC+3.70 and RPC+4.39. Download here: http://ftp.kameli.net/pub/fit/ports/ledblur_riscos.zip
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Markku Reunanen Message #111047, posted by Marq at 22:17, 21/8/2009, in reply to message #111033
Member
Posts: 11
Another little port. Actually it was already ported, but completely unusable on a real Risc PC. Planet Hively (a music disk) by IRIS and Up Rough:
http://ftp.kameli.net/pub/fit/ports/planeth_riscos_lores.zip
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Paul Stewart Message #111048, posted by sa110_mk at 09:10, 22/8/2009, in reply to message #111047
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Any chance of porting a demo that is a little bit more challenging in terms of processor requirements, perhaps something that would be more suited on the A9home or Iyonix rather than the Risc PC?
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Markku Reunanen Message #111050, posted by Marq at 22:53, 22/8/2009, in reply to message #111048
Member
Posts: 11
Lessee smile Some of the ports are so slow that they might actually run well only on A9home or Iyonix. But while we're at it here's one more:
http://ftp.kameli.net/pub/fit/miracle/miracle_riscos.zip

A bit sluggish on SA Risc PC. Sorry about that, but this production was originally made for a lot faster computer.
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Markku Reunanen Message #111051, posted by Marq at 11:17, 23/8/2009, in reply to message #111050
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And another: http://ftp.kameli.net/pub/fit/anataus4/anataus4_riscos.zip
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Paul Stewart Message #111054, posted by sa110_mk at 18:07, 25/8/2009, in reply to message #111050
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This runs fine on the A9home. Any chance you do an "unwatered down" version. Be good to see how that runs.
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Markku Reunanen Message #111055, posted by Marq at 21:17, 25/8/2009, in reply to message #111054
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Here you go: http://www.kameli.net/~marq/miraslow.zip

Compiled straight from the original Linux source. Painfully slow on my SA Risc PC at least smile There's quite a lot of fp code in there.
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Paul Stewart Message #111066, posted by sa110_mk at 20:25, 26/8/2009, in reply to message #111055
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Posts: 144
The A9home copes with this quite well.
One or two millisecond pauses as it plays thru, and the orange boulders bounce a little slower. Neither of these distracted from watching the demo tho.

The whole demo to me seamed a little crisper than the watered down version.
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Jason Togneri Message #111067, posted by filecore at 20:42, 26/8/2009, in reply to message #111066

Posts: 3867
Yeah, lack of FPE always was a bugger in Acorn boxen, A7000 and below. I always wished I could have gotten my hands on an A7000+ at some point, for the ARM7500FE. Still, I suppose at this point it's all rather academic, in any sense of the term big smile
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Martin Bazley Message #111073, posted by swirlythingy at 13:23, 27/8/2009, in reply to message #111055

Posts: 460
Here you go: http://www.kameli.net/~marq/miraslow.zip

Compiled straight from the original Linux source. Painfully slow on my SA Risc PC at least smile There's quite a lot of fp code in there.
Perfectly watchable on an Iyonix - and a definite improvement at that. Thank you!

Also, a slight oddity isn't present in this version - while both of them suffer from needing a far smaller screen mode than the computer can provide, resulting in two tiny screens side by side in the middle, in the first version the white background flash effect in the middle overran to fill up the blank parts of the screen as well as the bits the demo was actually occupying, whereas the new one just flashed the relevant parts.

I realise this is rather academic, as it's not supposed to be letterboxed and duplicated in the first place. wink
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Trevor Johnson Message #116158, posted by trevj at 20:25, 4/1/2011, in reply to message #110942
Member
Posts: 660
That said, demos for retro machines manage to be mindblowing, especially when given the constraints of the system. There are people doing ridiculously impressive things with half the power of a BBC, let alone an Iyonix.
Check out Tom Walker's Demo 128!
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qUE Message #116159, posted by qUE at 00:10, 5/1/2011, in reply to message #116158
qUE

Posts: 187
That said, demos for retro machines manage to be mindblowing, especially when given the constraints of the system. There are people doing ridiculously impressive things with half the power of a BBC, let alone an Iyonix.
Check out Tom Walker's <a target=_top href="http://stardot.org.uk/forums/viewtopic.php?f=2&t=3695&p=31651#p31567">Demo 128</a>!
Haha, that's comedy

I expect that took Tom quite a while to do, really cool tho'

RE: what was said on swth forum
might have to try and make the next Sundown demo party. yet another excuse to get plastered smile
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Trevor Johnson Message #116160, posted by trevj at 09:19, 5/1/2011, in reply to message #116159
Member
Posts: 660
...might have to try and make the next Sundown demo party. yet another excuse to get plastered smile
I doesn't look as if there'll be one this year (bbc fun 03.jpg).

But fret not:
...I'm not done with it completely!
...and there are a couple of posts from the Bristol area in that thread!
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qUE Message #116168, posted by qUE at 18:40, 5/1/2011, in reply to message #116160
qUE

Posts: 187
...might have to try and make the next Sundown demo party. yet another excuse to get plastered smile
I <a target=_top href="http://www.sundowndemoparty.org/">doesn't look as if</a> there'll be one this year (<a target=_top href="http://www.spiny.org/sundownpics/original/bbc%20fun%2003.JPG">bbc fun 03.jpg</a>).

But fret not:
<a target=_top href="http://ukdemoscene.org/forum/viewtopic.php?pid=649#p649">...I'm not done with it completely!</a>
...and there are a couple of posts from the Bristol area in that thread!
Not sure you can class Weston-Super-Mud as Brisol smile

Well, hopefully there will be another one. Weirdly enough someone mentioned the Sundown convention to me at the 2010 London ROS show.
Really like the whole Demo scene thing. The retro stuff is what I like about programming when you actually have to think about how efficient your code is. Alas I think it'll be a lost art in the future, before you know it, you'll have an army of kiddies scripting hugely metary nonsense which requires equivelent to the supercomputers today to just about run :/
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Trevor Johnson Message #116169, posted by trevj at 20:36, 5/1/2011, in reply to message #116168
Member
Posts: 660
We could always lobby for the IN4K wiki to be included in the school IT curriculum!
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qUE Message #116172, posted by qUE at 00:33, 6/1/2011, in reply to message #116169
qUE

Posts: 187
We could always lobby for the <a target=_top href="http://in4k.untergrund.net/">IN4K wiki</a> to be included in the school IT curriculum!
Well I dunno about that, some of the stuff the guys do in the demo scene is pretty spectacular, proper maffs.

I think they should at least start with basics of programming in schools, actually teaching kids about 2D graphics and simple 3D graphics programming without a preset API/library to at least give them an idea of how it works internally. C++ in a nice readable format would also be something worth explaining to kids at least as I don't see C++ being one of these fad languages anytime soon. If they've got a grasp of the basics in this then they at least stand a chance of transferring that knowledge to and quickly picking up other languages and systems.

Because most schools have PCs; give them a template program which sets them up with access to all the memory and the video framebuffer, explain what they need to avoid in memory and what they can use. It'll not only teach them about handling memory with video directly which is pretty universal across technology, but it'll also teach them how to not be tied into GUIs/OSes and other stuff large corps. try to snare programmers in to.
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The Icon Bar: General: Some demos ported