A.D.A. Amiga Demoscene Archive

The most awesome event of the demoscene summer is back yet again.

www.solskogen.no

Tickets have been out for a while and the A500 invtro should hopefully be out before the end of this month!

We just released the Amiga invitation for Solskogen in the oldschool intro compo at Simulatio. Now you really have no excuses for not participating! ;)

Party Elkstravaganza

Pretty sweet invitro I'd say!

Thanks!
Now you can get a peek behind the scenes of it as well! :)

Thanks for this! Just made a small news at Scena.PPA.pl.

Loady discussing amiga code just a few days ahead of Solskogen?

This smells of comeback! And you should be there when it happens! Plan your trip to Solskogen NOW!

I'm not counting on it but that would be the best news ever...

It was awesome to see Ephidrena back with a new demo. Until a few weeks ago, i never thought it would happen.

Looking forward to see it. Simply can't get it working completely in my Amiga Forever setup. The c2p effects and the crossfader parts (and also partly the glow copperbars) work, but not what's inbetween. Will just wait for a YT capture by someone. Splendid music, though!

You probably have to run it from CLI without startup sequence. There are some effects that use 640x256x9 bytes of chipram. At least I can't run it from workbench.

Nice, thanks. Frequent also uploaded a capture last night, so I got to see it. Very nice and fresh colourscheme!

thanks! :) Ironically now that we finally made a demo that has decent frame rate on the real thing then everybody is watching youtube captures and on emulator. Maybe this demo is 20 years too late hehe

Without having seen the demo on a real Amiga, i have the impression that both available video captures (Frequent's and Retrodemoscene's) from Winuae have issues. In Frequent's capture, are the neon bars supposed to curl up at the edge of the screen? Also, there seems to be some random noise when the greetings are shown? In RDS's capture, there are a whole bunch of issues but the neon bars don't curl up and there is no noise in the greetings parts.

Any chance of doing a capture from the demo as intended, Loaderror?

The copper bug (lines "curling up") was very much present when the demo was shown on a proper Amiga at solskogen and I suspect it's just the good old "copper wait for hpos 01 instead of 07"-issue.
I assume the RDS capture is X-cropped as it also doesn't show the overlays being clipped against a lower X-position than the copper bars.

Interesting. These neon bars look fantastic but the curling bug ruins the effect a bit.

My network is too slow to see the youtube at the moment. I would think Frequent's would be proper as he knows what it should look like on a real Amiga. If the RDS capture has lots of blinking noise it means they run out of memory while showing the demo. There is some dynamically allocated chip ram in this demo so it might not run properly if there is a chipram shortage (typically if running from workbench).

The credits sprite noise and copper bars artefacts on the side and bottom of the screen are real bugs. The sprites are probably displaying some garbage memory for a split second and the copper stuff at the side I'm not quite sure about. I could fix it by using color 1 instead of color 0 for the bars. I was thinking enabling border blank (ECS feature) would turn this all into black. The bottom of the screen stuff I could fix by making the bottomest line black.

I also saw some copper garbage near the bottom of the screen if running from some overscan screen not positioned at 0,0 in workbench earlier.

The copper waits are just generated by the system CWAIT( y,0 ) .. I can try to change it to 07.

In that case, Frequent's is the best capture since both issues are real bugs. It was a bit confusing since the RDS capture didn't have these issues. Would be cool to see a fixed version :)

@rloaderror: I've never used CWAIT but when writing _actual_ copper waits by hand the difference is this:

This (and a lot of other horizontal values) changes the color at not-quite-the-right-time


This is how to do it:

Of course, this won't help with the annoying case of the sprite overlays clipping to an "invisible border" at a lower X-position than the copper bars.
To fix that you could simply crop the copper bars (using color1 or, maybe, BRDBLNK as you mentioned), *or* you could try to get the sprites working outside of the display area as well (at least I _think_ that's supposed to be possible. And it's of course a lot cooler to have maximum overscan!) :)

I tried changing the value a bit. Seems like it had no effect when using the CWAIT approach. I'll have to check what it's actually producing. I know it is converting 0 to 2c for the vpos so who knows what it's up to with the hpos.

I should try that sprites in borders bit! Just to tick another "I'm using the hardware" box . It's an aga or ecs feature even

It looks like the low bits of the color are not set for the border. I tried different x-wait values and verifying they ended up in the copper without getting rid of the artefact. I can see the color change point is getting offset though. however the border remains a non-AGA color.

Is the cstart() failed error when trying to run neonsky due to running from workbench? I wonder how i could run it from cli in Winuae if my workbench is an adf file (i can't alter the startup-sequence and i can't access the boot menu). I've been trying a few things to get the demo running but no positive result yet.

Can't access the boot menu using 'hold down both mouse buttons' ?

cstart() could fail for a number of reasons. In Workbench the problem might be due to lack of chipram. Does it say anything more?

Try reducing the number of colors on your workbench to as few as possible and set lowres screenmode with as small screen as you can to save chip ram. Maybe it is possible to quit WB too? I think there is a menu option for it although it always says it can't quit IIRC :D

Icons might use chipram too, but not sure how to release memory used by icons.

I think I can try to reduce chipram usage in the final version.

If it is UAE, I think there are some option to set 8 MB chipram if I remember correctly :)

The workbench starts too fast to access the boot menu. I have 8 MB chipram so should be enough :) Any special libraries required maybe? I'll try that. Iirc, some of your older demos required special libs.

I can only think of lowlevel.library as something unusual. But I believe this is standard too. You can check if your adf comes with it.

Yep, that's the library i needed. It works now. Thanks.

Funny thing is that I don't think I'm using lowlevel.library for anything anymore. Just open it at the start of the demo for old times sake then close it at the end. I'll also check this in the final.

Been watching the shader compo 2017, and Blueberry/Rothie really made some nice designs!

Is the soundtrack of Concoon - Shunting Yard available to purchase/download?
Simply breathtaking track! https://www.youtube.com/watch?v=2eWvpy6_Cd0

Not sure about that one, but atleast the Terminal 7 soundtrack could be found on soundcloud under the artist name credited in the demo.