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Forum: Coders. Asm / Hardware Today, 08:00
Replies: 32
Views: 991
Posted By meynaf
Personnally i would reconsider using own encoded...

Personnally i would reconsider using own encoded soundchip output rather than original music code and data. For example COSO/TFMX songs are quite small and you could reuse player code where...
Forum: support.Apps 09 September 2021, 20:44
Replies: 14
Views: 796
Posted By meynaf
You don't need to do that. Winuae settings are...

You don't need to do that. Winuae settings are enough.
Forum: support.Apps 09 September 2021, 13:07
Replies: 14
Views: 796
Posted By meynaf
Benchmarks on emulators aren't very reliable so...

Benchmarks on emulators aren't very reliable so it's not meaningful. Especially Sysinfo, giving quite delirious values with JIT.
You can also alter some settings to reach completely bogus values (i...
Forum: Coders. Asm / Hardware 09 September 2021, 07:17
Replies: 16
Views: 715
Posted By meynaf
There are several reasons why instruction streams...

There are several reasons why instruction streams can go haywire, not only RTS.
If the crash always happens then i'd just trace the code with a debugger, executing subroutine calls directly instead...
Forum: New to Emulation or Amiga scene 08 September 2021, 13:52
Replies: 5
Views: 629
Posted By meynaf
For ports there is a place : ...

For ports there is a place :
http://eab.abime.net/showthread.php?t=85200
Forum: Coders. System 08 September 2021, 09:19
Replies: 13
Views: 663
Posted By meynaf
Be awared that if you do that, you may end up...

Be awared that if you do that, you may end up with false positives due to data or instruction operands mismatched with branch instructions.



That's Pandora's box to open. All addresses inside...
Forum: project.Amiga Game Factory 06 September 2021, 09:03
Replies: 261
Views: 90,651
Posted By meynaf
First ensure you have AGA active. Else screen...

First ensure you have AGA active. Else screen won't open.
Then your error message indicates something wrong with SMK replay. Check you have all relevant files. See readme in the game archive (mine)....
Forum: support.WinUAE 21 August 2021, 12:56
Replies: 11
Views: 758
Posted By meynaf
Alternative way could be to create a different...

Alternative way could be to create a different shortcut that will be seen in Amiga side as being Alt-Tab.
Forum: Amiga scene 20 August 2021, 18:24
Replies: 172
Views: 13,399
Posted By meynaf
It's not that simple. FPU code can run 50 times...

It's not that simple. FPU code can run 50 times faster (maybe more ?) than software float, but AMMX is far away from reaching that level of acceleration.
Forum: Amiga scene 19 August 2021, 12:58
Replies: 172
Views: 13,399
Posted By meynaf
As Promilus said -- it's just how marketing is...

As Promilus said -- it's just how marketing is done.
They badly want their AMMX/64-bit to be used massively, they're proud of these things, but in reality they don't count.
I wouldn't be surprised...
Forum: Amiga scene 19 August 2021, 10:05
Replies: 172
Views: 13,399
Posted By meynaf
Not really. The commercial success comes from the...

Not really. The commercial success comes from the fact it faster runs existing apps. The new features have nothing to do with that.



Toni Wilen said it himself : whole thing is developer...
Forum: support.Games 19 August 2021, 09:31
Replies: 31
Views: 2,159
Posted By meynaf
There is also the possibility to copy files by...

There is also the possibility to copy files by hand. Put them all in single dir except for fonts for which you have to keep "fonts" dir and run EOBII program.
Forum: Coders. Asm / Hardware 18 August 2021, 11:25
Replies: 21
Views: 1,764
Posted By meynaf
My impression is that an interrupt comes for...

My impression is that an interrupt comes for whatever reason and there is nothing to handle it -> crash.
If running in supervisor mode (i suppose it does, it's embedded thingy), then move.w...
Forum: Coders. Asm / Hardware 16 August 2021, 08:10
Replies: 21
Views: 1,764
Posted By meynaf
Try this : _start: lea 0x12345678, %a2...

Try this :

_start:
lea 0x12345678, %a2 | address; placeholder value, replaced
movl #0x12345678, %d7 | length; placeholder value, replaced
movb #0x88, %d1 | value; placeholder...
Forum: Retrogaming General Discussion 16 August 2021, 08:01
Replies: 285
Views: 39,570
Posted By meynaf
They are as easy to change as on the WB, just...

They are as easy to change as on the WB, just boot with something that does it. Actually even easier, as running a program touching hardware color registers is enough.
All the floppies i made to be...
Forum: Retrogaming General Discussion 14 August 2021, 21:50
Replies: 285
Views: 39,570
Posted By meynaf
The green desktop isn't necessarily green, the...

The green desktop isn't necessarily green, the color can be changed.
The keyboard sound can also be disabled.
Forum: Coders. Asm / Hardware 14 August 2021, 15:06
Replies: 21
Views: 1,764
Posted By meynaf
Is the code allowed to destroy itself ? Because...

Is the code allowed to destroy itself ?
Because then we can do :

insn:
lea insn(pc),a2
loop:
moveq #3,d7
wait:
move.w RX.w,d1
btst #13,d1 ; check for data being ready
Forum: Coders. Asm / Hardware 14 August 2021, 14:34
Replies: 21
Views: 1,764
Posted By meynaf
If write to 0 isn't acceptable, then it's still...

If write to 0 isn't acceptable, then it's still doable this way :

insn:
move.w #$31fc,insn.w ; neutral - overwritten with value and 16-bit target address
moveq #3,d7
lea insn+2(pc),a2
wait:...
Forum: Coders. Asm / Hardware 14 August 2021, 13:31
Replies: 21
Views: 1,764
Posted By meynaf
What is the effect of a write to address zero ?...

What is the effect of a write to address zero ? If it's no-op, then you can perform the write in all cases and do the loop afterwards, sparing a branch.
Forum: News 07 August 2021, 16:33
Replies: 25
Views: 3,370
Posted By meynaf
Six months work isn't nothing. How to know how...

Six months work isn't nothing. How to know how much the prize pool currently is ?
Forum: Coders. Asm / Hardware 05 August 2021, 14:00
Replies: 18
Views: 1,239
Posted By meynaf
If you want to see all effects at once : ...

If you want to see all effects at once :

move.l #$55558888,a0
move.l #$11111111,a1
adda.w a0,a1 ; a1=$11109999
Forum: News 03 August 2021, 21:36
Replies: 25
Views: 3,370
Posted By meynaf
This is tempting. Is it possible to enter the...

This is tempting. Is it possible to enter the competition with several ports (in the same category) ?
I might do one or two more ST game ports ;)
Forum: Coders. Asm / Hardware 03 August 2021, 16:27
Replies: 18
Views: 1,239
Posted By meynaf
Try this then : move.l #$00007fff,a0 ...

Try this then :

move.l #$00007fff,a0
move.l #$0000ffff,a1
add.w a0,a1 ; a1=00017ffe
Forum: Coders. Asm / Hardware 03 August 2021, 10:05
Replies: 18
Views: 1,239
Posted By meynaf
No flags affected by MOVEA, ADDA, SUBA. Only CMPA...

No flags affected by MOVEA, ADDA, SUBA. Only CMPA does.



Are you sure Motorola documented that ? MOVEA and ADDA sure also do a sign-extend.




If you like odd things : even though...
Forum: Coders. Asm / Hardware 02 August 2021, 07:50
Replies: 18
Views: 1,239
Posted By meynaf
There is also the trick to use CMPA.W on same reg...

There is also the trick to use CMPA.W on same reg to check if a signed value fits in 16-bit (i.e. is between $ffff8000 and $00007fff).
Forum: Coders. Asm / Hardware 28 July 2021, 08:41
Replies: 15
Views: 1,681
Posted By meynaf
For reference, shift and add version : ...

For reference, shift and add version :

move.w d0,d1
add.w d0,d0
add.w d0,d1
lsl.w #2,d0
lsl.w #6,d1
add.w d1,d0
Forum: request.Modules 19 July 2021, 07:44
Replies: 6
Views: 1,683
Posted By meynaf
DeliTracker 2.x can play these with Deli-Wizard...

DeliTracker 2.x can play these with Deli-Wizard plugin (on the fly conversion from Pro-Wizard routines).
Forum: Retrogaming General Discussion 10 July 2021, 16:31
Replies: 166
Views: 9,352
Posted By meynaf
Except that ARM isn't faster than Intel, even if...

Except that ARM isn't faster than Intel, even if they badly want everyone to believe otherwise (and somehow succeeded).
The reason behind this move is that they wanted to remove the dependency to...
Forum: Coders. Asm / Hardware 26 June 2021, 11:42
Replies: 21
Views: 1,985
Posted By meynaf
Do you have moving objects everywhere on the...

Do you have moving objects everywhere on the screen ?
If you have large areas that don't change often, you could restore only the part that encompasses all moving objects (finding this out is just...
Forum: support.Apps 22 June 2021, 07:09
Replies: 16
Views: 1,105
Posted By meynaf
It now plays fine. As suspected, it is...

It now plays fine. As suspected, it is DaveLowe_Deli replayer.
I could make it work with DT2.34, EP1.54, EP2.02 (i.e. all versions i have).
I simply put the replayer to ram disk, run DT or EP, then...
Forum: support.Apps 21 June 2021, 19:59
Replies: 16
Views: 1,105
Posted By meynaf
Probably DaveLowe_Deli as i have the two others....

Probably DaveLowe_Deli as i have the two others. Can you remember where you got it ?
Forum: support.Apps 21 June 2021, 19:48
Replies: 16
Views: 1,105
Posted By meynaf
I don't have a player named "Dave Lowe's sound...

I don't have a player named "Dave Lowe's sound system". Where does it come from ?
Forum: support.Apps 21 June 2021, 19:19
Replies: 16
Views: 1,105
Posted By meynaf
On my setup it does not.

On my setup it does not.
Forum: Coders. General 15 June 2021, 12:14
Replies: 59
Views: 4,733
Posted By meynaf
I should have guessed i needed to hunt that in...

I should have guessed i needed to hunt that in 68000 manual... :shocked
Ok, it's an oddity i didn't know of.
Forum: Coders. General 15 June 2021, 11:22
Replies: 59
Views: 4,733
Posted By meynaf
Sorry, but even EC030 addendum doesn't mention...

Sorry, but even EC030 addendum doesn't mention anything like that.
In the regular manual i don't see anything EC related.
So, exact location please.



Nobody's stopping me. It's just that it...
Forum: Coders. General 15 June 2021, 11:06
Replies: 59
Views: 4,733
Posted By meynaf
I did. Having found nothing mentioning that, i...

I did. Having found nothing mentioning that, i suppose you should read it too - and if you find it, it would be nice if you directly tell (not just me, but everyone) at which page in said manual this...
Forum: Coders. General 15 June 2021, 10:01
Replies: 59
Views: 4,733
Posted By meynaf
I doubt. These registers are MMU registers. This...

I doubt. These registers are MMU registers. This means : no working MMU, no working TTx. If MMU is completely disabled, say hello to line-F when attempting to use PMOVE instruction.
What you wrote...
Forum: Coders. General 15 June 2021, 09:06
Replies: 59
Views: 4,733
Posted By meynaf
No they can't do anything if there is no MMU...

No they can't do anything if there is no MMU (that can be at least partially used).
Or tell me what they can do in that case ? Get a line-F exception while trying a pmove to tt0/tt1 ?



Yes but...
Forum: Coders. General 15 June 2021, 08:24
Replies: 59
Views: 4,733
Posted By meynaf
Yes but this isn't useful for accelerator boards...

Yes but this isn't useful for accelerator boards that aren't broken.



Well, the only problem i can see is reading from chipmem - which is slow and ought better be avoided.
And when we need to...
Forum: Coders. General 14 June 2021, 14:09
Replies: 59
Views: 4,733
Posted By meynaf
And that's all ? So either they can't do a...

And that's all ?
So either they can't do a thing at all (not even half working MMU that can be used) or they slow the machine down activating the MMU to fix a rare corner case ?
All that, taking...
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