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Forum: Coders. Asm / Hardware Yesterday, 19:26
Replies: 7
Views: 213
Posted By ross
Since the source is a list, perhaps this is more...

Since the source is a list, perhaps this is more 'standard'?:

FMOVEM.L #$11111111/#$22222222/#$33333333,FPCR/FPSR/FPIAR
Forum: News 21 January 2021, 21:56
Replies: 796
Views: 60,403
Posted By ross
I seem to have seen something in the same folder...

I seem to have seen something in the same folder as that other file :p

[you can hit me if you want :bash :D]
Forum: News 21 January 2021, 15:32
Replies: 796
Views: 60,403
Posted By ross
Into the Zone! (actually is a repack, but start...

Into the Zone!
(actually is a repack, but start faster than a true unpacked version)

I apologize to the Abyss guys for the missing text in the loader, more due to laziness than for technical...
Forum: Coders. Asm / Hardware 19 January 2021, 01:34
Replies: 137
Views: 6,675
Posted By ross
Thanks for the link (that I'd missed till now..)...

Thanks for the link (that I'd missed till now..) :)
Forum: Coders. Asm / Hardware 19 January 2021, 00:55
Replies: 137
Views: 6,675
Posted By ross
:agree --- Just out of curiosity, how...

:agree

---

Just out of curiosity, how did you solve the problem of the different phase between the left and right channel?
From the DMA allocator it seems that for the right channels (HI+LO)...
Forum: OT - General 18 January 2021, 20:36
Replies: 21
Views: 703
Posted By ross
My nephew was here... Put it in the object that...

My nephew was here...
Put it in the object that this thread is X-rated!!



:p
Forum: Coders. Asm / Hardware 18 January 2021, 19:41
Replies: 137
Views: 6,675
Posted By ross
Attempt for a new approach, it might even be...

Attempt for a new approach, it might even be completely useless or bad ;)

All Amiga 14-bit players, calibrated or not, try to make the most by spreading 6-bit (the least significants) from the...
Forum: Coders. Asm / Hardware 17 January 2021, 18:01
Replies: 137
Views: 6,675
Posted By ross
I would not underestimate the report by Bruce and...

I would not underestimate the report by Bruce and also confirmed by others in the forum (that A1200 dynamic range is close or better than 75 dB).
If we find a way to make quantization uniform, then...
Forum: Coders. Asm / Hardware 17 January 2021, 17:53
Replies: 18
Views: 887
Posted By ross
:agree yep, even in my code you can often find...

:agree yep, even in my code you can often find those that seem more WaitTOF than they should.
In fact, there is a reason, for the 'unfortunate' cases :)
Forum: Coders. Asm / Hardware 17 January 2021, 17:33
Replies: 18
Views: 887
Posted By ross
Yes this works, but for a simple reason: your...

Yes this works, but for a simple reason: your copper DMA reactivation is done not nuch after the VB.
If for any reason you have an IRQ or init code that 'moves' the reactivation of the copper...
Forum: support.WinUAE 17 January 2021, 00:42
Replies: 6
Views: 243
Posted By ross
Ok, it took me a while but I found my post on why...

Ok, it took me a while but I found my post on why it happens :):
http://eab.abime.net/showpost.php?p=1157566&postcount=8
Forum: support.WinUAE 17 January 2021, 00:25
Replies: 6
Views: 243
Posted By ross
My crystal ball tells me you have something like...

My crystal ball tells me you have something like this at end of 24-bit memory:
00FFFFF0 0000 0000 0000 0000 0000 0000 0000 0000

Amiga do not use Autovector for IRQs..
Forum: Coders. Asm / Hardware 16 January 2021, 13:23
Replies: 137
Views: 6,675
Posted By ross
Thomas, I understand that you want to simplify...

Thomas, I understand that you want to simplify the matter, but it is not that by continuing to say this, it becomes true.
Only bypassing the PWM stage, ie at volume 64, you have an output signal...
Forum: Nostalgia & memories 15 January 2021, 11:36
Replies: 26
Views: 1,276
Posted By ross
I remember when I first received Hoi sAGA. But...

I remember when I first received Hoi sAGA.
But I had already done my experiments with the new registers :D (debugging KS3.0 SO copper list)

:great
Forum: Coders. Asm / Hardware 15 January 2021, 00:43
Replies: 22
Views: 849
Posted By ross
Speaking of index pre-multiplication, you can...

Speaking of index pre-multiplication, you can always do dirty things like constant spacing between routines and just use:

jmp (routines,pc,d0.w)

routines
r1 ..code..
rts
cnop ...
Forum: Coders. Asm / Hardware 15 January 2021, 00:01
Replies: 22
Views: 849
Posted By ross
Damn, so for .w is the same (.b limit it too...

Damn, so for .w is the same (.b limit it too much..)

Well, so 32 cycles is the minimum.

An advantage of the message #12 approach might be some memory savings.
Forum: Coders. Asm / Hardware 14 January 2021, 23:37
Replies: 22
Views: 849
Posted By ross
But I wonder for a pure 68000 what is the best...

But I wonder for a pure 68000 what is the best way (faster, shorter, using fewer registers).
Maybe something like that?:

add.w d0,d0
move.w table(pc,d0.w),d0
jmp ...
Forum: Coders. Asm / Hardware 14 January 2021, 23:11
Replies: 22
Views: 849
Posted By ross
Or: jmp ([jmp_table.w,pc,d0.w*4]) ...

Or:
jmp ([jmp_table.w,pc,d0.w*4])

jmp_table:
dc.l routine1
dc.l routine2
dc.l routine3
dc.l routinen
Forum: Coders. Asm / Hardware 14 January 2021, 22:45
Replies: 137
Views: 6,675
Posted By ross
It was not measured at all, 14 bits of a 16-bit...

It was not measured at all, 14 bits of a 16-bit sample were used with a separation between 8 high (max volume) and 6 low bits (min volume) :)
Forum: Coders. Asm / Hardware 14 January 2021, 22:13
Replies: 137
Views: 6,675
Posted By ross
http://eab.abime.net/showpost.php?p=1453278&postco...

http://eab.abime.net/showpost.php?p=1453278&postcount=55

But I think that cannot be never compensated enough, Paula quantization levels are too raw (the PCM part) and the PWM need to be handled as...
Forum: Coders. Asm / Hardware 14 January 2021, 21:57
Replies: 16
Views: 602
Posted By ross
I think the problem lies elsewhere, from those...

I think the problem lies elsewhere, from those code snippets I can't understand.


Yes, this is what I usually do to differentiate which video mode I am in, but I do it for a completely different...
Forum: Coders. Asm / Hardware 14 January 2021, 20:41
Replies: 16
Views: 602
Posted By ross
ehehe, some mod need to fix this :D: ...

ehehe, some mod need to fix this :D:
http://eab.abime.net/showpost.php?p=1453858&postcount=8

How did it happen, a space-time shift? :p
Forum: Coders. Asm / Hardware 14 January 2021, 20:28
Replies: 7
Views: 981
Posted By ross
Do you recover the old view (gb_ActiView)? I...

Do you recover the old view (gb_ActiView)?
I mess with BEAMCON0 an no problem at exit..
Forum: Coders. Asm / Hardware 14 January 2021, 19:28
Replies: 22
Views: 849
Posted By ross
I just wrote 020 code out of laziness ;) ...

I just wrote 020 code out of laziness ;)

Anyway just add add.w d0,d0 and it's the same.
Unless you have to use the value of d0 in the target routine.
Forum: Coders. Asm / Hardware 14 January 2021, 19:20
Replies: 16
Views: 602
Posted By ross
Yes, it does it. But copinit is unique and...

Yes, it does it.

But copinit is unique and irremovable and before exiting I fix everything :D
Forum: Coders. Asm / Hardware 14 January 2021, 19:14
Replies: 22
Views: 849
Posted By ross
Or fully avoid the table: ...

Or fully avoid the table:

move.w demo_state,d0
beq.w CPUOnly
subq.w #1,d0
beq.w BlitterOnly
subq.w #1,d0
beq.w Combined
Forum: Coders. Asm / Hardware 14 January 2021, 18:57
Replies: 16
Views: 602
Posted By ross
Or, without IRQs disabling, what my piece of code...

Or, without IRQs disabling, what my piece of code do here :):
jsr (_LVOWaitTOF,a6)
movea.l (gb_copinit,a6),a2
; move.l (a2),d7 ; save somewhere
move.l #$00960200,(a2)...
Forum: Coders. Asm / Hardware 14 January 2021, 18:38
Replies: 137
Views: 6,675
Posted By ross
Can this code be useful?: ...

Can this code be useful?:
http://eab.abime.net/showpost.php?p=1413016&postcount=92
Forum: Coders. Asm / Hardware 14 January 2021, 18:30
Replies: 137
Views: 6,675
Posted By ross
Problem here is that Paula is a strange beast,...

Problem here is that Paula is a strange beast, it's not like the usual PCM or PDM emitter of today. It' a mixed PCM/PWM state machine, prone to distortions due to her inner working. Add to this:...
Forum: Coders. Asm / Hardware 14 January 2021, 16:25
Replies: 137
Views: 6,675
Posted By ross
Coincidentally I wrote: "and about vinyl, yes...

Coincidentally I wrote:
"and about vinyl, yes for me also sound 'better' than CD, it is more colorful and full-bodied (and I'm not talking about the 'physical' or 'measurable' qualities of sound at...
Forum: Coders. Asm / Hardware 14 January 2021, 16:15
Replies: 16
Views: 602
Posted By ross
Just to be very picky you could also avoid the...

Just to be very picky you could also avoid the "first frame glitch" (LoadView() do not internally call WaitTOF so you could end with a partial view and custom_registers changes in the middle of a...
Forum: Coders. Asm / Hardware 14 January 2021, 15:36
Replies: 16
Views: 602
Posted By ross
It's usually because of interlace mode. ...

It's usually because of interlace mode.

WaitTOF() do it per field and not per frame.

---

Forgotten in previous messages.

There is also the whole question of WB message handling that...
Forum: Coders. Asm / Hardware 14 January 2021, 13:39
Replies: 16
Views: 602
Posted By ross
I don't remember the exact reason anymore, and...

I don't remember the exact reason anymore, and maybe I talked about it in another thread somewhere, my sequence is identical to what Toni indicated but with a small difference, which I probably found...
Forum: Coders. Asm / Hardware 14 January 2021, 12:41
Replies: 16
Views: 602
Posted By ross
Hi Graeme, only a few hints, I looked at it very...

Hi Graeme, only a few hints, I looked at it very quickly.

- your code lack a _OwnBlitter call.
- what's the point in raising the task priority? If you completely disable system IRQs there is no...
Forum: Coders. Asm / Hardware 13 January 2021, 18:41
Replies: 11
Views: 358
Posted By ross
I had just found this:...

I had just found this: https://eab.abime.net/showpost.php?p=304428&postcount=14
But Toni already posted :)
Forum: Coders. Asm / Hardware 13 January 2021, 12:43
Replies: 137
Views: 6,675
Posted By ross
Problem is that I've no more a real machine.. ...

Problem is that I've no more a real machine..

But I clearly remember the abysmal difference on audio quality between my old A500 and my A1200 (1d4), with the same conditions of play of course....
Forum: Coders. Asm / Hardware 13 January 2021, 00:23
Replies: 137
Views: 6,675
Posted By ross
A not too complex article on bit-depth and sound...

A not too complex article on bit-depth and sound quality:
https://www.soundguys.com/audio-bit-depth-explained-23706/
and why for a casual listener 12 bit audio may even be good.
Forum: Coders. Asm / Hardware 12 January 2021, 23:29
Replies: 137
Views: 6,675
Posted By ross
Now I don't want to go into endless arguments,...

Now I don't want to go into endless arguments, but the frequency used is really unfair for Paula. I understand your reasons but being an arbitrary value you could also choose it differently. But here...
Forum: Coders. Asm / Hardware 12 January 2021, 23:06
Replies: 137
Views: 6,675
Posted By ross
Perhaps first it is better to decide which...

Perhaps first it is better to decide which machine to try Paula with.

Value for the fixed LP RC filter (from posted paper):

- Amiga 500/2000: 4.42 kHz (100 nF, 360 ohm)
- A600 Rev2: 27.7 kHz...
Forum: Coders. Asm / Hardware 12 January 2021, 22:07
Replies: 18
Views: 887
Posted By ross
The broken A500 version works if you set a fast...

The broken A500 version works if you set a fast CPU clock.. (even if a 68000)

EDIT: A500+ 1MB fast, base 68k speed, works.. so yes seems a timing/memory issue

EDIT2: also noticed you have some...
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