Search found 59 matches

by uko
Fri Feb 19, 2021 8:44 pm
Forum: News & Announcements
Topic: Blitter version test
Replies: 28
Views: 1060

Re: Blitter version test

Hi! I have tested with my 520 STE and I get the $0040 value. Blitter reference: S9018AE MM9092V CPU: MC68000FN8 (so not CMOS version if I'm right) For fun, I have tested emulators with STE configuration: Hatari: $003F Steem SSE: $0000 (seems strange may have made a mistake ? but I have checked blitt...
by uko
Thu Feb 18, 2021 5:28 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

slingshot wrote: Thu Feb 18, 2021 5:08 pm BTW, it works great on MiST already ;)
Happy to hear that !
by uko
Wed Feb 17, 2021 10:20 am
Forum: 680x0
Topic: Devpac debugging tutorial
Replies: 25
Views: 814

Re: Devpac debugging tutorial

Although I recognize that debuggers of emulators can be very powerful, I still continue to use adebug (even under emulation) for debugging my own code.
It seems that not a lot of people use it, but I've always prefered it over monst.
by uko
Sun Feb 14, 2021 10:10 pm
Forum: Floppy Disk Preservation
Topic: GOEX Drive from Centurion
Replies: 8
Views: 305

Re: GOEX Drive from Centurion

Hi,
I use GOEX in my STe, and there is nothing special to do: just copy valid images onto a blank card.
by uko
Fri Feb 12, 2021 6:30 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

Thanks for your comments !

And really sorry for the megaSTe :-(
by uko
Sat Jan 23, 2021 2:41 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

Ok ! The mask and other blitter settings are different for each VBL according to the logo position and size.
by uko
Fri Jan 22, 2021 9:11 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

Hi Slingshot, I have looked back at the source and here is how the cycles must be computed: There are, as you said, 120 + the lsr 8+2*d3 cycles are used by the CPU in between borders, with d3 always even. In addition there are also 4 cycles lost at blit launch and 4 cycles at blit end, so a sum of 1...
by uko
Fri Jan 22, 2021 1:38 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

4 cycles are taken at blit launch and 4 cycles at blit end.
According to the code that does the launch and after the launch, the cpu may or not do some internal processing. In my code, if I remember well, the cpu can't do nothing during these cycles.
And I will check your calculations later !
by uko
Fri Jan 22, 2021 1:13 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

I'd need to take some time to analyse your message, but have you taken into account the blitter bus arbitration cycles ?
And the impact of the mask on the fist word for the blitting time ?
by uko
Fri Jan 22, 2021 12:30 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

It is 8+2n, but take care that 2n will be rounded to 4 for odd values of n.
And I have written 8+4x because d3 is equal to x*2 in my code (x has other meaning than the number of shifts) to avoid this rounding to 4 problem.
by uko
Tue Jan 19, 2021 10:27 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

Very nice demo. I enjoyed that. The Star Wars Scroller has a nice draw distance. Did you use Photochrome for the graphics or is it all custom code? Thanks ! For the R2-D2 picture I did not use Photochrome, but I have used Zerkman's MPP converter that I have adapted to create a new mode (and corresp...
by uko
Tue Jan 19, 2021 9:45 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

jvas wrote: Tue Jan 19, 2021 7:06 am Thank you. No problem at all! I'll dig my STE out. This definitely worth it!
:thumbs:
by uko
Tue Jan 19, 2021 6:44 am
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

neanderthal wrote: Mon Jan 18, 2021 9:52 pm Quick tested on falcy and got similar style (mostly black with some artefacts at swiches)after the first screen or something
Hi, it's is definitively not compatible with Falcon, because of fullscreen switches not supported by the videl, and also of precise timings.
by uko
Mon Jan 18, 2021 7:59 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

Thanks all of you for your nice comments !

Uko
by uko
Mon Jan 18, 2021 7:58 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

Should it run on a MegaSTE? I see garbage instead of the pictures both in 16 and 8 Mhz. No sorry it won't work correctly on MegaSTE... The blitter requires one additional bus arbitration cycle on this computer, and especially in the MPP R2-D2 screen where it is used for changing the color palettes ...
by uko
Sun Jan 17, 2021 10:47 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

Thanks! What a nice surprise, and a very neat demo indeed! All coded from scratch! I like that! Isn't it amazing that programming in assembly on an old machine is so much fun (more fun than any modern high level programming if you ask me). :wink: Thank you very much ! And I can't agree more, such a...
by uko
Sun Jan 17, 2021 10:15 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

I like the screen with multicolor starship nmasked with STAR WARS text. I wonder how do you did this. The masking is quite simple: the falcon picture is 8 colors per line, so 3 bitplanes only. And the StarWars logo is displayed on the 4th bitplane only. With correct palette configuration, writing 0...
by uko
Sun Jan 17, 2021 10:10 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

calimero wrote: Sun Jan 17, 2021 6:24 pm Graphics is superb!
I wish if it was a little bit longer! :)
But really nice product. Music and vibe...
Graphics are not mine...
I would have also liked to make it longer, but I definitively spent too much time coding it ! :lol:
by uko
Sun Jan 17, 2021 10:08 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

Re: New STe demo: The Star Wars demo by The Arctic Land

npomarede wrote: Sun Jan 17, 2021 4:28 pm Well done for finishing this demo, glad Hatari helped to complete it :)
I don't think I could have done the same demo without Hatari !
by uko
Sun Jan 17, 2021 4:10 pm
Forum: Coding
Topic: Blitter Execution Times
Replies: 44
Views: 8725

Re: Blitter Execution Times

Hi !

I have finally finished my demo for which I've encountered the below problems. Now working on real HW and on Hatari !
https://www.atari-forum.com/viewtopic.php?f=1&t=39979

Thanks for your support !

Uko
by uko
Sun Jan 17, 2021 4:04 pm
Forum: Demos - General
Topic: New STe demo: The Star Wars demo by The Arctic Land
Replies: 40
Views: 2188

New STe demo: The Star Wars demo by The Arctic Land

Hi ! I have just released a new demo for 2MB Atari STe, with Fullscreen and 12.5kHz MOD Music, hundreds of colours, blitter zooming FX. https://demozoo.org/productions/289094/ https://youtu.be/UEuqfD_gW6U All the code and music are available here: https://github.com/Uko-TAL/TheStarWarsDemo Enjoy ! U...
by uko
Thu Dec 24, 2020 3:13 pm
Forum: Demos - General
Topic: Merry Xmas 2020 - Santa Demo
Replies: 9
Views: 543

Re: Merry Xmas 2020 - Santa Demo

Thanks ! It's nice. Merry Xmas !
by uko
Thu Dec 24, 2020 1:40 pm
Forum: 680x0
Topic: STE MOD Play code for fullscreen demos
Replies: 5
Views: 2541

Re: STE MOD Play code for fullscreen demos

If some of you are interested, I've just pushed minor updates on the repository: 2 bug fixes, and add of a parameter to slightly shift the notes replay frequencies so as to be multiple of STE frequencies (allows to increase quality when not playing at 50kHz).
by uko
Thu Sep 17, 2020 7:54 pm
Forum: Coding
Topic: Blitter Execution Times
Replies: 44
Views: 8725

Re: Blitter Execution Times

You can try it with Hatari devel version and it will be included in Hatari 2.3 I have done some tests and it seems that Hatari is very accurate now versus real HW for this blitter aspect ... but not the way I would have hoped ! :lol: Let me explain. In the screen I am coding, I encountered a bug wi...
by uko
Fri Sep 11, 2020 9:40 am
Forum: Coding
Topic: Blitter Execution Times
Replies: 44
Views: 8725

Re: Blitter Execution Times

Great !!!
I'll try this with the develop version soon.
Thanks Nicolas.

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