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Search: Posts Made By: Yragael
Forum: Coders. Asm / Hardware 02 June 2019, 22:25
Replies: 10
Views: 708
Posted By Yragael
Yep, and thanks for the references. This is the...

Yep, and thanks for the references. This is the explanation to the previous conclusion. Lesson to remember for metal coders: we never cut the system enough! :)
Forum: Coders. Asm / Hardware 02 June 2019, 19:46
Replies: 10
Views: 708
Posted By Yragael
Nailed!

Ok. Thanks to your help, I noticed that I was preventing the music routine to run as a lvl 6 interrupt handler, but still restoring the lvl 6 interrupt. So I was not removing the system lvl 6...
Forum: Coders. Asm / Hardware 02 June 2019, 19:26
Replies: 10
Views: 708
Posted By Yragael
Thanks. Indeed, the problem is related to this...

Thanks. Indeed, the problem is related to this instruction:

move.w #$E000,INTENA(a5)

The problem does not occur if I remove it.

But this is most strange, because this instruction is...
Forum: Coders. Asm / Hardware 02 June 2019, 18:13
Replies: 10
Views: 708
Posted By Yragael
Unhappy Where? First run and second run seem the same to...

Where? First run and second run seem the same to me, bit BLIT never being set in INTENA:


move.w INTENAR(a5),intena
move.w #$7FFF,INTENA(a5)
move.w INTREQR(a5),intreq
move.w...
Forum: Coders. Asm / Hardware 02 June 2019, 17:04
Replies: 10
Views: 708
Posted By Yragael
Doesn't sound like the explanation. This bit is...

Doesn't sound like the explanation. This bit is cleared at the beginning:


move.w #$07FF,DMACON(a5)


and later not set:


move.w #$83C0,DMACON(a5) ;DMAEN=1, BPLEN=1, COPEN=1,...
Forum: Coders. Asm / Hardware 02 June 2019, 16:23
Replies: 10
Views: 708
Posted By Yragael
Puzzling: Blitter line drawing faster on second execution

Hi guys,

A most puzzling problem to me, that you surely will solve in a blink.

Here is the code of a little program that just draws 20 times the same line with the Blitter in a loop.

But...
Forum: Coders. General 28 December 2018, 09:49
Replies: 5
Views: 726
Posted By Yragael
Thanks for the answer. As it happens with some FX...

Thanks for the answer. As it happens with some FX : it is too simple (by this, I also mean smart!) to think about it :)
Forum: Coders. General 27 December 2018, 10:50
Replies: 5
Views: 726
Posted By Yragael
The 12 one pixel sine scrolls trick

I was reading an article in Zine #10 (yes, old readings... I was looking for interesting stuff to write a sequel to an article about diskmags archeology I published on my blog a long time ago),...
Forum: Coders. Tutorials 21 November 2018, 10:04
Replies: 4
Views: 1,498
Posted By Yragael
Which proved very useful, thanks. Is there a...

Which proved very useful, thanks. Is there a better version available somewhere?
Forum: Coders. Tutorials 18 November 2018, 10:36
Replies: 4
Views: 1,498
Posted By Yragael
Code / data / tools of Scoopex "TWO" (rotozoom cracktro for Starquake)

Hi to all,

Since the great Galahad released the Amiga version of Starquake which "cracked" version begins with a cracktro I coded (awesome picture by Alien, awesome tune by Curt Cool), the code /...
Forum: Amiga scene 16 November 2018, 22:16
Replies: 361
Views: 76,593
Posted By Yragael
Indeed, this was fun!

Indeed, this was fun!
Forum: Coders. Asm / Hardware 28 September 2018, 14:10
Replies: 5
Views: 618
Posted By Yragael
Would this not mean setting the bitplanes...

Would this not mean setting the bitplanes addresses to odd addresses?
Forum: Coders. Asm / Hardware 28 September 2018, 00:10
Replies: 5
Views: 618
Posted By Yragael
BPLCON1 scroll values in HiRes

Hi guys,


I forgot how the horizontal scroll values (PF2Hx bits in BPLCON1) work in HiRes (bit 15 HIRES of BPLCON0 is set). It seems that the maximum scroll value is 7 Hires pixels ?


$0000...
Forum: Coders. Tutorials 26 September 2018, 11:13
Replies: 16
Views: 2,593
Posted By Yragael
zoom3.s and zoom4.s contain the code to shrink...

zoom3.s and zoom4.s contain the code to shrink horizontally the picture using the Blitter. Such code is required to shrink the picture horizontally when the possibilities of the hardware horizontal...
Forum: Coders. Tutorials 26 September 2018, 11:07
Replies: 16
Views: 2,593
Posted By Yragael
Yes. This won't work because of this reason. You...

Yes. This won't work because of this reason. You would only be able to shrink the image every 64 pixels. I did not try.
Forum: Coders. Tutorials 11 September 2018, 14:10
Replies: 16
Views: 2,593
Posted By Yragael
Well done. Hiding the problem if it cannot be...

Well done. Hiding the problem if it cannot be solved easily, or cannot be solved at all, is definitely part of the art of demomaking.
Forum: Coders. Tutorials 11 September 2018, 08:49
Replies: 16
Views: 2,593
Posted By Yragael
Some figures in the tutorial got fixed this...

Some figures in the tutorial got fixed this morning: the scenario for the hardware horizontal zoom, and the matching "magic table". Not easy to translate this assembly code in Excel figures :)
Forum: Coders. Tutorials 10 September 2018, 19:32
Replies: 16
Views: 2,593
Posted By Yragael
Yes I noticed it. Awesome. Although I just...

Yes I noticed it. Awesome.

Although I just checked the Copper list with the MK III, and it does not appear that this very talented guy did use the BPLCON1 trick (which makes the FX even more...
Forum: Coders. Tutorials 10 September 2018, 17:39
Replies: 16
Views: 2,593
Posted By Yragael
Tutorial published

Well the tutorial is published here, width downloadable code :



http://www.stashofcode.fr/zoom-hardware-avec-bplxmod-et-bplcon1-sur-amiga/


In french but should translate well with Google....
Forum: Coders. Tutorials 04 September 2018, 17:16
Replies: 16
Views: 2,593
Posted By Yragael
Thanks. Great demos. I will definitely pick the...

Thanks. Great demos. I will definitely pick the Star Wars scroller. I had a look at the Copper list for the Star Wars scroller (nice!). The Copper updates BPLCON1, as expected, and the low address...
Forum: Coders. Tutorials 04 September 2018, 13:53
Replies: 16
Views: 2,593
Posted By Yragael
Tutorial about zooming with BPLCON1 (102) : Looking for examples

Hi guys,


I'm finishing a little tutorial about horizontal hardware zooming using the famous BPLCON1 trick.



I am looking for examples of this zoom in famous demos. I was a bit suprised to...
Forum: Coders. Tutorials 15 August 2018, 00:00
Replies: 9
Views: 2,326
Posted By Yragael
The files bobRAW.s and bobRAWB.s have been...

The files bobRAW.s and bobRAWB.s have been updated in the archive. Sorry guys : the previous ones were bad versions, with no masking.
Forum: Coders. Tutorials 12 August 2018, 01:26
Replies: 9
Views: 2,326
Posted By Yragael
I added perfectBob.s to the ZIP file. It is...

I added perfectBob.s to the ZIP file.

It is an enhanced version of bobRAWB.s: it displays a BOB that is masked (ie: the BOB may contain transparent pixels) and that is cleared from the background...
Forum: Coders. Tutorials 11 August 2018, 21:43
Replies: 2
Views: 1,632
Posted By Yragael
For example with ASM-One, the contents of your...

For example with ASM-One, the contents of your file would be (missing tab before DC.B : you have to add it) :

start:
DC.B $1234
end:

You would then assemble the file using command "A". Then...
Forum: Coders. Tutorials 24 July 2018, 13:57
Replies: 32
Views: 12,639
Posted By Yragael
Yes, forcing the code in Chip is bad habit, and...

Yes, forcing the code in Chip is bad habit, and you are right to point it. I should have created a data section if data had to be loaded in Chip. Also, I will shorten the comments lines in new or...
Forum: Coders. Tutorials 24 July 2018, 11:47
Replies: 32
Views: 12,639
Posted By Yragael
For those looking for a more hardware way, I just...

For those looking for a more hardware way, I just published two source codes for reading push / release of a key of the keyboard without using the system functions :
...
Forum: support.Demos 17 July 2018, 21:40
Replies: 8
Views: 2,614
Posted By Yragael
I could not make it work. Displays a nice...

I could not make it work. Displays a nice kickstart logo animation, then a message and loads up to track 20, then nothing. I used a classic A500 no FAST kickstart 1.3 (won't load with 1.2 : setpatch...
Forum: Coders. Tutorials 12 July 2018, 18:53
Replies: 9
Views: 2,326
Posted By Yragael
New tutorial on BOBs

Hi


For those who need some basic code to start with BOBs in assembly language, I just published this article :


http://www.stashofcode.fr/afficher-sprites-et-bobs-sur-amiga-2/


Written...
Forum: Coders. Tutorials 08 July 2018, 11:41
Replies: 7
Views: 1,924
Posted By Yragael
I checked and this is what Tony Willen reported...

I checked and this is what Tony Willen reported in the thread. I quote and underline. Thanks for noticing it :


Dual playfield:

Any number of planes. No 5+ requirement here.


If...
Forum: Coders. Tutorials 08 July 2018, 11:30
Replies: 7
Views: 1,924
Posted By Yragael
Ok. I will check the thread and update the...

Ok. I will check the thread and update the article accordingly.
Forum: Coders. Tutorials 08 July 2018, 09:28
Replies: 7
Views: 1,924
Posted By Yragael
@ross: Thanks :) A little bug corrected...

@ross: Thanks :)


A little bug corrected this morning in triplePlayfield.s : for an unknown reason, PF2P2 and PF1P2 must not be set in BPLCON0 for the triple playfield to work on A500 (would work...
Forum: Coders. Tutorials 07 July 2018, 23:36
Replies: 7
Views: 1,924
Posted By Yragael
New tutorial on sprites

Hi


For those who need some basic code to start with sprites in assembly language, I just published this article :


http://www.stashofcode.fr/afficher-sprites-et-bobs-sur-amiga-1/

...
Forum: support.Demos 07 July 2018, 17:44
Replies: 8
Views: 2,614
Posted By Yragael
Looking for a demo with adaptive vector balls

Hi


I'm writing an article about BOBs, and I would like to mention vector balls. I am looking for a demo with vector balls, where a ball diameter would change depending on the depth of the ball....
Forum: Coders. Asm / Hardware 05 July 2018, 13:59
Replies: 8
Views: 1,067
Posted By Yragael
What is the deal with bit SH0 of SPRxCTL during horizontal comparison ?

Another question related to the horizontal position of a sprite. The Hardware Reference Manual figure describing the inner workings of the DMA for the sprites shows that the horizontal position of...
Forum: Coders. Asm / Hardware 03 July 2018, 18:18
Replies: 8
Views: 1,067
Posted By Yragael
Thanks!

Thanks!
Forum: Coders. Asm / Hardware 03 July 2018, 17:16
Replies: 8
Views: 1,067
Posted By Yragael
Little trouble with sprite horizontal position

Hi,



I have some trouble positioning a sprite horizontally.


The DIWSTRT of my screen is the usual $2C81, meaning that the starting X position is $81.
Forum: Amiga scene 09 June 2018, 11:58
Replies: 7
Views: 538
Posted By Yragael
Yes all articles will be written in english and...

Yes all articles will be written in english and in french.
Forum: Amiga scene 09 June 2018, 09:43
Replies: 7
Views: 538
Posted By Yragael
I do not have much time for coding. But who...

I do not have much time for coding. But who knows? The source code may help coders who want to code games.
Forum: Amiga scene 09 June 2018, 09:41
Replies: 7
Views: 538
Posted By Yragael
Indeed, and since the upcoming Scoopex is for AGA...

Indeed, and since the upcoming Scoopex is for AGA since it required a bunch of bitplanes, I will tell more about this AGA registers story in an upcoming article.



For the intros, the code was...
Forum: Amiga scene 08 June 2018, 21:29
Replies: 7
Views: 538
Posted By Yragael
Looking for graphics artists and musicians for a bunch of cracktros-like productions

Hi,

I hope I'm posting this in the good thread. Sorry for the inconvience if I choosed poorly.

I used to code cracktros on Amiga (a list with links to Flashtro remakes and YouTube videos here...
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