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Forum: Coders. Asm / Hardware Yesterday, 16:01
Replies: 17
Views: 370
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, 11:48
Replies: 3
Views: 197
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, 15:03
Replies: 21
Views: 936
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, 14:56
Replies: 51
Views: 1,188
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, 08:59
Replies: 26
Views: 900
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, 17:29
Replies: 3
Views: 215
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, 15:10
Replies: 229
Views: 23,722
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, 13:09
Replies: 229
Views: 23,722
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, 12:02
Replies: 492
Views: 32,794
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, 09:08
Replies: 229
Views: 23,722
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, 17:28
Replies: 9
Views: 371
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, 17:13
Replies: 9
Views: 371
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, 16:27
Replies: 9
Views: 371
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, 16:06
Replies: 9
Views: 371
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, 18:55
Replies: 492
Views: 32,794
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, 12:02
Replies: 18
Views: 504
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, 19:44
Replies: 36
Views: 1,315
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, 19:18
Replies: 36
Views: 1,315
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, 18:08
Replies: 36
Views: 1,315
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, 17:47
Replies: 12
Views: 558
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, 13:27
Replies: 40
Views: 941
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, 11:10
Replies: 40
Views: 941
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, 10:49
Replies: 40
Views: 941
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, 21:05
Replies: 40
Views: 941
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, 10:26
Replies: 7
Views: 431
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, 21:20
Replies: 7
Views: 431
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, 13:26
Replies: 6
Views: 413
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, 13:12
Replies: 27
Views: 1,339
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, 20:02
Replies: 2,097
Views: 308,917
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, 15:00
Replies: 27
Views: 1,056
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, 12:09
Replies: 17
Views: 684
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, 10:46
Replies: 17
Views: 684
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.
Forum: Coders. System 14 February 2019, 10:26
Replies: 27
Views: 1,056
Posted By meynaf
IIRC this is TDNestCnt. But it's a counter, not a...

IIRC this is TDNestCnt. But it's a counter, not a mere flag (calls to Forbid must be matched by the same number of calls to Permit).
Forum: support.Apps 12 February 2019, 20:57
Replies: 16
Views: 516
Posted By meynaf
For Protracker you don't need plugins, DT has...

For Protracker you don't need plugins, DT has internal replayer for it.
Forum: support.Apps 12 February 2019, 19:34
Replies: 16
Views: 516
Posted By meynaf
You must have DeliGenies and DeliPlayers dirs....

You must have DeliGenies and DeliPlayers dirs. Normally the two i mentioned are subdirs inside.
Forum: support.Apps 12 February 2019, 18:40
Replies: 16
Views: 516
Posted By meynaf
Delitracker has lots of plugins. Move the ones...

Delitracker has lots of plugins. Move the ones you're not using to PlayerStore & GenieStore subdirs.
Forum: Retrogaming General Discussion 11 February 2019, 10:43
Replies: 39
Views: 1,742
Posted By meynaf
For a coder like me nothing can properly replace...

For a coder like me nothing can properly replace the Amiga. Even emulators with code running faster, don't give the same feeling.
Forum: Coders. Asm / Hardware 06 February 2019, 21:05
Replies: 7
Views: 574
Posted By meynaf
For your example, why not using the usual...

For your example, why not using the usual shortcut for the topmost bit :

tst.w (a0)
bpl.s .go
bra.s .nogo


About bit checks : if you're operating on large bit arrays in memory, you can...
Forum: Coders. Asm / Hardware 06 February 2019, 19:30
Replies: 7
Views: 574
Posted By meynaf
BF instructions aren't fast. But they're single...

BF instructions aren't fast. But they're single instruction doing the job of several. Thus they're often faster than the unwieldy bit manipulation they replace.

Consider BFINS for example. For...
Forum: Retrogaming General Discussion 04 February 2019, 09:43
Replies: 12
Views: 772
Posted By meynaf
All my Atari ST game ports support screen...

All my Atari ST game ports support screen flipping with Amiga-M :)
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