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Search: Posts Made By: meynaf
Forum: Amiga scene 15 April 2019, 14:08
Replies: 145
Views: 13,324
Posted By meynaf
Yeah, and now said cars happily pollute...

Yeah, and now said cars happily pollute...
Forum: Coders. Asm / Hardware 10 April 2019, 17:03
Replies: 7
Views: 802
Posted By meynaf
Not really. Chipmem should be marked as...

Not really. Chipmem should be marked as non-cacheable (for data) and you will hardly have to ever move code with it.
Forum: Coders. Asm / Hardware 08 April 2019, 15:35
Replies: 10
Views: 579
Posted By meynaf
You may try commenting out instructions or blocks...

You may try commenting out instructions or blocks of instructions, to see the impact of each on timing (= what's "covered" by chipmem writes and what's not).
Forum: Coders. Asm / Hardware 04 April 2019, 16:06
Replies: 233
Views: 24,774
Posted By meynaf
And I have no time for personal attacks that...

And I have no time for personal attacks that usually follow my valid points when the other has nothing more to say.



Good idea, but coding 100% asm is the only way to correctly get my point.
...
Forum: Coders. Asm / Hardware 04 April 2019, 09:48
Replies: 233
Views: 24,774
Posted By meynaf
This is the only example he could provide... ...

This is the only example he could provide...
Anyway, the point is that he said Atari compilers mostly apply this ABI while this is not true. Only recent compilers like gcc do, and perhaps not all of...
Forum: support.Games 30 March 2019, 15:06
Replies: 9
Views: 457
Posted By meynaf
It is in theory possible. But that's much work...

It is in theory possible. But that's much work for little reward.
Forum: Coders. Asm / Hardware 27 March 2019, 18:35
Replies: 27
Views: 1,292
Posted By meynaf
When i wrote my system unfriendly debugger many...

When i wrote my system unfriendly debugger many years ago, i gave it an option to move itself around in memory. There was no program i couldn't enter with it, even if it was sometimes tricky. So...
Forum: Coders. Asm / Hardware 27 March 2019, 18:31
Replies: 6
Views: 406
Posted By meynaf
If he is on AGA then there is 68020+ in the...

If he is on AGA then there is 68020+ in the machine and it might be better to use the cpu rather than the blitter.
Forum: Coders. Asm / Hardware 23 March 2019, 15:01
Replies: 27
Views: 1,292
Posted By meynaf
Break it down in smaller pieces. You know C ?...

Break it down in smaller pieces. You know C ? Then do C. You can then learn AmigaOS and even the hardware. Then 68k code is just another language.
Forum: support.Apps 18 March 2019, 10:48
Replies: 3
Views: 329
Posted By meynaf
Files/dirs under AmigaDOS only give the date the...

Files/dirs under AmigaDOS only give the date the file was last modified. If you use FAT95 you can get the two others only by checking the file note.

However, enquiring the date of a volume (like...
Forum: Coders. Asm / Hardware 14 March 2019, 14:03
Replies: 21
Views: 1,214
Posted By meynaf
Quite valid point for 68k. But it's less obvious...

Quite valid point for 68k. But it's less obvious for e.g. x86, for which i'd personnally prefer bad C...



It might be a great tool if it were able to produce C that actually compiles and works....
Forum: Coders. Asm / Hardware 14 March 2019, 13:56
Replies: 66
Views: 2,331
Posted By meynaf
What could have been implemented without much...

What could have been implemented without much trouble i do not know, but what's badly missing is clearly chunky and true color modes.
Forum: Retrogaming General Discussion 12 March 2019, 07:59
Replies: 26
Views: 1,054
Posted By meynaf
Would like to finish these, one day : ...

Would like to finish these, one day :
Dragonflight
Ultima 6
Forum: request.Other 09 March 2019, 16:29
Replies: 3
Views: 327
Posted By meynaf
Perhaps add -r switch to the command line ?

Perhaps add -r switch to the command line ?
Forum: Coders. Asm / Hardware 08 March 2019, 14:10
Replies: 233
Views: 24,774
Posted By meynaf
gcc isn't alone in the world. What...

gcc isn't alone in the world.



What does this bring ? I could have replied exactly the same to what you wrote...



It is relevant for most, if not all, functions.
Forum: Coders. Asm / Hardware 08 March 2019, 12:09
Replies: 233
Views: 24,774
Posted By meynaf
What Atari compilers ? Megamax (the most used...

What Atari compilers ? Megamax (the most used back in the day) trashes D0-D3/A0-A1. MacOs uses D0-D2/A0-A1. Unix on m68k isn't representative.



You have to check the notes of every function you...
Forum: Coders. General 08 March 2019, 11:02
Replies: 489
Views: 34,068
Posted By meynaf
You do not need to pester anyone : ...

You do not need to pester anyone :
http://eab.abime.net/faq.php?faq=vb_faq#faq_thezone_faq_item
Forum: Coders. Asm / Hardware 08 March 2019, 08:08
Replies: 233
Views: 24,774
Posted By meynaf
This is only Amiga ABI. Atari ST and MacOS 68k...

This is only Amiga ABI. Atari ST and MacOS 68k are different.
The secret isn't saving registers or not, it is that it has to be thoroughly documented.
Every routine must have some comment at start...
Forum: Coders. Asm / Hardware 07 March 2019, 16:28
Replies: 9
Views: 499
Posted By meynaf
Yes, but unfortunately it's limited to 8 bits so...

Yes, but unfortunately it's limited to 8 bits so your example here doesn't work :p
Forum: Coders. Asm / Hardware 07 March 2019, 16:13
Replies: 9
Views: 499
Posted By meynaf
Originally this code trick was for checking the...

Originally this code trick was for checking the presence of a null byte in a longword. It's not my invention, I just found it somewhere on the internet years ago, and adapted it for nibbles.


...
Forum: Coders. Asm / Hardware 07 March 2019, 15:27
Replies: 9
Views: 499
Posted By meynaf
There is an even faster way, but it needs data...

There is an even faster way, but it needs data representation to be changed from D6=$00000589 to D6=%1100100000 (value with bits 9,8,5 set to 1).
Forum: Coders. Asm / Hardware 07 March 2019, 15:06
Replies: 9
Views: 499
Posted By meynaf
There is a coding trick to do this, provided some...

There is a coding trick to do this, provided some conditions are met :
- d7 would contain $55555555 rather than just 5 (a table lookup can perform the conversion)
- all nibbles of the longword are...
Forum: Coders. General 05 March 2019, 17:55
Replies: 489
Views: 34,068
Posted By meynaf
Any game maybe not, but this one certainly.

Any game maybe not, but this one certainly.
Forum: Retrogaming General Discussion 05 March 2019, 11:02
Replies: 18
Views: 534
Posted By meynaf
Learned chess by playing Battle Chess. ...

Learned chess by playing Battle Chess.

Perhaps Civilization/Colonization can help understanding the world in some way.
Forum: Amiga scene 01 March 2019, 18:44
Replies: 36
Views: 1,424
Posted By meynaf
Just seen that, but to me they look more like...

Just seen that, but to me they look more like duplicates in the list (from the link you provided above). Perhaps you could use the real title for each of them (players only show the first song but...
Forum: Amiga scene 01 March 2019, 18:18
Replies: 36
Views: 1,424
Posted By meynaf
I seriously doubt all these can be considered as...

I seriously doubt all these can be considered as small sfx-like songs ;)
These mods have sub-songs, but maybe the player you use doesn't support them ?

The 3 mods contain :
(mod 1/3 : menu songs...
Forum: Amiga scene 01 March 2019, 17:08
Replies: 36
Views: 1,424
Posted By meynaf
Looks like you missed many songs in bump'n'burn...

Looks like you missed many songs in bump'n'burn musics...
In total this game has 3 mugician mods, for a total of 12 songs.
Forum: Coders. Asm / Hardware 27 February 2019, 16:47
Replies: 12
Views: 674
Posted By meynaf
Data declared as DS directives is guaranteed to...

Data declared as DS directives is guaranteed to be zero except in code-bss or data-bss sections (= code/data sections with bss at the end).
You don't need to clear allocated data by hand, AllocMem...
Forum: Retrogaming General Discussion 27 February 2019, 12:27
Replies: 40
Views: 986
Posted By meynaf
This has nothing to do with the kind of device...

This has nothing to do with the kind of device that has been first used (in my case, old 8-bit keyboard, not even a joystick).
For me it's simply that there is no strict rule about what hand to use...
Forum: Retrogaming General Discussion 27 February 2019, 10:10
Replies: 40
Views: 986
Posted By meynaf
I've seen this as well, but what i can't see is a...

I've seen this as well, but what i can't see is a practical reason for doing so.
Switching the fork takes time.
Always using the same hand for the same action seems more logical.



Yeah, i'm...
Forum: Retrogaming General Discussion 27 February 2019, 09:49
Replies: 40
Views: 986
Posted By meynaf
Seems strange to me as well, and i'm no left...

Seems strange to me as well, and i'm no left hander.
I use my right hand for fork and spoon, always. Which makes me use my left hand for the knife instead of switching like i've seen other people do.
Forum: Retrogaming General Discussion 26 February 2019, 20:05
Replies: 40
Views: 986
Posted By meynaf
Right-handed. Regardless of joystick type,...

Right-handed.
Regardless of joystick type, holding it with right hand, buttons with right hand, but steering with left hand.
Forum: project.EAB 26 February 2019, 09:26
Replies: 7
Views: 564
Posted By meynaf
Why ? The more brightness, the more the eyes...

Why ?
The more brightness, the more the eyes get tired - i tell this by experience.
And nobody is forced to use it anyway.
Forum: project.EAB 25 February 2019, 20:20
Replies: 7
Views: 564
Posted By meynaf
You could also use Ibrowse and tell it to use...

You could also use Ibrowse and tell it to use fixed colors (which is what i did in the past).
Nevertheless I vote +1 for a dark eab skin. It would have at least two users ;)
Forum: Coders. General 23 February 2019, 12:26
Replies: 6
Views: 539
Posted By meynaf
If facing that problem i'd first try to build...

If facing that problem i'd first try to build some kind of a cell cache. Then extra information isn't for full map but only for the current area.
Just an idea...
Forum: Coders. General 23 February 2019, 12:12
Replies: 27
Views: 1,579
Posted By meynaf
Direct algorithms are too slow for doing that....

Direct algorithms are too slow for doing that. You need to use a lookup table.
For computing the color difference, i got good results with R*2+G*3+B*1.
Forum: Nostalgia & memories 18 February 2019, 19:02
Replies: 2,138
Views: 314,975
Posted By meynaf
The engine is more or less the same, but changes...

The engine is more or less the same, but changes from one game to another make it unsuitable to run anything but the game it came with.

You can try replacing the data files of one game with...
Forum: Coders. System 14 February 2019, 14:00
Replies: 27
Views: 1,252
Posted By meynaf
But does the task really exit ? If run from WB...

But does the task really exit ? If run from WB directly, it does. If run from some cli, then the cli is the current task and it does not get deleted after the program exits. Besides, the demo might...
Forum: support.Other 14 February 2019, 11:09
Replies: 17
Views: 742
Posted By meynaf
If EP fails you may try DT (DeliTracker2). Not...

If EP fails you may try DT (DeliTracker2). Not perfect, but it's usually quite good for protracker.
Forum: support.Other 14 February 2019, 09:46
Replies: 17
Views: 742
Posted By meynaf
In theory, no. In practice, i've found...

In theory, no.
In practice, i've found pathological cases where EP fails to properly play the mod.
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