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Forum: Coders. Tutorials Today, 01:23
Replies: 38
Views: 1,421
Posted By phx
That's a bug. There should be no automatic file...

That's a bug. There should be no automatic file format detection when you clearly specified it as raw binary. Fixed.


Yes. Seems that Nicolas prepared IRA for some more formats like Atari,...
Forum: Coders. Tutorials 02 April 2020, 21:37
Replies: 38
Views: 1,421
Posted By phx
This looks like reading the BPTR which links the...

This looks like reading the BPTR which links the next section. I guess that the $8002 skips the first four bytes which would be the BPTR to the next section. So the real offset is $7ffe, as Kamelito...
Forum: Coders. Tutorials 29 March 2020, 12:44
Replies: 38
Views: 1,421
Posted By phx
Hm... but all offset-comments are aligned at...

Hm... but all offset-comments are aligned at position 40! Maybe you have an editor or viewer which is not set to the standard tab-width of 8?

Not yet. But I already have that on my ToDo-list for...
Forum: Coders. General 26 March 2020, 21:31
Replies: 8
Views: 408
Posted By phx
That's much too little! You will have problems...

That's much too little! You will have problems with notes in the lowest octave. The standard always was around 10 raster lines, which is approximately 496 ticks. Now 576 ticks is more than 12 and a...
Forum: Coders. General 26 March 2020, 18:42
Replies: 8
Views: 408
Posted By phx
576 is already a lot. It doesn't hurt to try, but...

576 is already a lot. It doesn't hurt to try, but then it is probably a different problem.

The next step would be to find out if it always happens at the same positions in the song and try to...
Forum: Coders. General 26 March 2020, 18:17
Replies: 8
Views: 408
Posted By phx
This sounds like the same problem which Slamy...

This sounds like the same problem which Slamy first reported to me from a beta tester for his "Tiny Little Slug". It was an A1200 as well. Seems that the hardware is strange...

The problem turned...
Forum: New to Emulation or Amiga scene 26 March 2020, 17:37
Replies: 34
Views: 2,433
Posted By phx
So far so good. This should provide you with an...

So far so good. This should provide you with an executable called "vasmm68k_mot" in the same directory. Copy it anywhere into your bin-path.

Do you want to compile a C source or an assembler...
Forum: New to Emulation or Amiga scene 26 March 2020, 13:31
Replies: 34
Views: 2,433
Posted By phx
vasm doesn't need any config file, so there must...

vasm doesn't need any config file, so there must be something very wrong.

First of all, how did you get vasm? Did you download it (where)? Did you compile it yourself (how)? On which host system...
Forum: Coders. Tutorials 26 March 2020, 01:33
Replies: 38
Views: 1,421
Posted By phx
http://aminet.net/package/dev/asm/ira

http://aminet.net/package/dev/asm/ira
Forum: Coders. Asm / Hardware 25 March 2020, 17:55
Replies: 26
Views: 1,254
Posted By phx
@Bruce: You really have to relax! What's the...

@Bruce: You really have to relax! What's the reason for your harsh tone in most discussions? Did Saimo do anything to you? Is it your ROM code he is talking about? :sad
Forum: Coders. Tutorials 25 March 2020, 13:15
Replies: 38
Views: 1,421
Posted By phx
When you are done with reassembly and start to...

When you are done with reassembly and start to analyse the source, the SYMBOL directive might become useful. You can replace any label by a symbol name of your choice, by specifying a name and the...
Forum: Nostalgia & memories 25 March 2020, 12:47
Replies: 65
Views: 3,067
Posted By phx
Not much. There was no day without Amigas for me...

Not much. There was no day without Amigas for me since 1987 and I kept everything.

Nearly everything. The biggest mistake I made was to lend my Golem 2MB Fast RAM extension and my 30MB RLL hard...
Forum: Coders. Tutorials 24 March 2020, 22:49
Replies: 38
Views: 1,421
Posted By phx
The original, non-portable, IRA release (V1.05)...

The original, non-portable, IRA release (V1.05) included a post-processor called "irapost" which did that. I never used it and it was left behind. It's probably better to rewrite it from scratch,...
Forum: Coders. Tutorials 24 March 2020, 19:22
Replies: 38
Views: 1,421
Posted By phx
You mean command line options? Most (all?)...

You mean command line options?
Most (all?) options are shown when IRA is started without arguments, together with a short description. Most important are -a, -preproc and -config, as shown in the...
Forum: Coders. General 24 March 2020, 17:19
Replies: 33
Views: 2,464
Posted By phx
Unfortunately a link to a1k makes no sense,...

Unfortunately a link to a1k makes no sense, because most sections are only accessible after registration.

Ok, so I just invested two hours to quickly translate the original tutorial text and...
Forum: Coders. Tutorials 24 March 2020, 17:14
Replies: 38
Views: 1,421
Posted By phx
Small IRA Tutorial

Many years ago I did this tutorial in german on a1k.org. I tried to quickly translate everything, so it can be useful for more people.
There was also a second part, which is about modifying the...
Forum: Coders. General 24 March 2020, 00:43
Replies: 33
Views: 2,464
Posted By phx
I am aware that a good tutorial for IRA is...

I am aware that a good tutorial for IRA is needed. Reassembly is always multi-pass, until you reach the point that the source may be freely modified without risking to break something.

I did an...
Forum: Coders. Asm / Hardware 23 March 2020, 22:13
Replies: 10
Views: 595
Posted By phx
I quickly wrote a tiny source text which shows...

I quickly wrote a tiny source text which shows that. You can ignore most of the code, except the copper list and the macros used by it. Note that this simplified example only works for rectangles...
Forum: Coders. Contest 23 March 2020, 15:48
Replies: 72
Views: 14,236
Posted By phx
You must have been quite frustrated with your...

You must have been quite frustrated with your project in the past, when I look at the state of your keyboard. Have you slammed your head into it quite too often? :D

Anyway, I'm happy to hear that...
Forum: Coders. Asm / Hardware 23 March 2020, 13:14
Replies: 7
Views: 426
Posted By phx
Probably a missing assignment for the library...

Probably a missing assignment for the library search path?

I don't know about Aztec-C V5, but I used V3.4 from hard disk 32 years ago on my A1000. What's was the exact command line for compiling...
Forum: Coders. General 21 March 2020, 22:30
Replies: 13
Views: 697
Posted By phx
Hmm. Then maybe there is an 68000 instruction...

Hmm. Then maybe there is an 68000 instruction which the 060 has to emulate? I do not remember.

Back in the days we had "loadlib" to pre-load ppc.library, so we could launch ELF execucatables. It...
Forum: Coders. Asm / Hardware 21 March 2020, 01:37
Replies: 2
Views: 266
Posted By phx
Yes, usually they are compatible. Unlike the...

Yes, usually they are compatible. Unlike the Atari ST, the Amiga's object file format was well defined and documented by Commodore. Refer to dos/doshunks.h. It uses similar hunk-format structures as...
Forum: Amiga scene 20 March 2020, 10:18
Replies: 42
Views: 1,429
Posted By phx
Is there a cycle-accurate C64 emulation in 50fps...

Is there a cycle-accurate C64 emulation in 50fps for the A500? I don‘t think so. The Z80 is a lot more complex than the 6502. The rest of the hardware might be easier to emulate, although the most...
Forum: Coders. General 19 March 2020, 20:57
Replies: 13
Views: 697
Posted By phx
Ahh... I missed that! That explains it. Never do...

Ahh... I missed that! That explains it. Never do that with an 68060, if you want to execute 020+ code. Maybe try the 68000-version of CubicIDE instead.
Forum: Coders. General 19 March 2020, 20:53
Replies: 13
Views: 697
Posted By phx
Your first screenshot showed an Exception #3...

Your first screenshot showed an Exception #3 (address error), but in the video I see an Exception #61 ($8000003D). As you are running on 68060 this could be an unimplemented integer instruction....
Forum: project.EAB 19 March 2020, 19:21
Replies: 572
Views: 112,919
Posted By phx
As you are coming from Greece I can understand...

As you are coming from Greece I can understand your irritation. It probably represents the feeling of central/northern Europeans. :D

I would also prefer to go to the beach swimming now, but...
Forum: New to Emulation or Amiga scene 19 March 2020, 11:32
Replies: 14
Views: 3,512
Posted By phx
It should be possible. But it is not wanted....

It should be possible. But it is not wanted. Unfortunately development doesn't stop and tries to force people to update their hard- and software constantly.

Many important websites will always...
Forum: Retrogaming General Discussion 18 March 2020, 15:58
Replies: 75
Views: 3,617
Posted By phx
Yes, Civilization is perfect. Or UFO - Enemy...

Yes, Civilization is perfect. Or UFO - Enemy Unknown. Maybe Battle for Wesnoth, if you have a NG-Amiga. I would prefer these. Others may like Settlers or Dune, a dungeon crawler, or some Point and...
Forum: Coders. Asm / Hardware 10 March 2020, 22:00
Replies: 4
Views: 399
Posted By phx
No, the reason is because of this line: jsr ...

No, the reason is because of this line: jsr _\1
Maybe you did an "xref crc32" somewhere, but you were actually calling _crc32.
Forum: Amiga scene 08 March 2020, 19:26
Replies: 613
Views: 59,446
Posted By phx
Wow! Nice demo. Really improved. Also the...

Wow! Nice demo. Really improved. Also the difficulty. When I don't get the double shot at the beginning of the level I cannot manage to pass the fat cannon. Maybe this is a problem when you die and...
Forum: Coders. Asm / Hardware 07 March 2020, 18:00
Replies: 10
Views: 582
Posted By phx
Yes, I think it is. Zero is the normal contents...

Yes, I think it is. Zero is the normal contents of memory locations 0 to 3. IIRC the OS only uses it in case of a system crash, when displaying a Guru (writing "HELP" to it)?

Although you should...
Forum: Coders. Asm / Hardware 03 March 2020, 15:11
Replies: 185
Views: 117,378
Posted By phx
Higgs looks like a really interesting high-level...

Higgs looks like a really interesting high-level assembler language, which might be useful to speed up development.

But to claim that it reaches identical speed to hand-optimized assembler cannot...
Forum: Amiga scene 26 February 2020, 22:49
Replies: 16
Views: 880
Posted By phx
I like "Scrap Yard I" - Turrican 3, stage 3-2....

I like "Scrap Yard I" - Turrican 3, stage 3-2. Although I enjoyed T2 more than T3, but I cannot get this track out of my mind. :)
...
Forum: Coders. Asm / Hardware 26 February 2020, 22:28
Replies: 32
Views: 1,625
Posted By phx
You probably wanted to say "AmigaDOS" pointers? I...

You probably wanted to say "AmigaDOS" pointers? I wouldn't expect that pointers returned by other parts of AmigaOS are longword-aligned (so I can understand ThoR's reply).

But even in dos.library...
Forum: Coders. Asm / Hardware 26 February 2020, 02:08
Replies: 32
Views: 1,625
Posted By phx
Not all pointers in dos.library functions are...

Not all pointers in dos.library functions are BCPL pointers, and not all of those pointers which are not BPTRs need 32-bit alignment. Usually this is documented.
Forum: Coders. Asm / Hardware 17 February 2020, 15:09
Replies: 16
Views: 852
Posted By phx
Thanks for all the input. Yes, I think anything...

Thanks for all the input. Yes, I think anything more than 32-bit alignment would waste more memory than it helps for performance.
Forum: Coders. Asm / Hardware 16 February 2020, 20:45
Replies: 16
Views: 852
Posted By phx
Thanks! Yes, I agree that cache-line...

Thanks!

Yes, I agree that cache-line alignment would be overkill. But maybe a "cnop 0,4" in front of each function cannot hurt.

All data aligned to their natural boundaries. Ok. So I shouldn't...
Forum: Coders. Asm / Hardware 16 February 2020, 14:31
Replies: 16
Views: 852
Posted By phx
Data/instruction alignment for 68020..060

What would be the prefered instruction and data alignment for 68020, 030, 040 and 060 to guarantee best performance?

I remember the 68020+ does "dynamic bus sizing"(?) to access data with any...
Forum: Amiga scene 13 February 2020, 10:31
Replies: 50
Views: 4,510
Posted By phx
:agree

:agree
Forum: Amiga scene 12 February 2020, 23:16
Replies: 50
Views: 4,510
Posted By phx
It's not a fault, it's our choice! We make the...

It's not a fault, it's our choice! We make the games because we have fun making them. And when somebody really wants a physical release then we don't want to have anything to do with the whole...
Showing results 1 to 40 of 1604

 
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