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Forum: Coders. Asm / Hardware Yesterday, 14:14
Replies: 69
Views: 3,120
Posted By ross
The key is here: "4 static, 7 updates in chip...

The key is here: "4 static, 7 updates in chip mem".

In my superficial calculation I've adopted 2 (vs 11) chip mem update for the gain, here there are 7 (vs 11) for a tie!
So you can also roughly...
Forum: support.Games Yesterday, 13:40
Replies: 650
Views: 223,044
Posted By ross
Hehe, you have AGA chipset in your A500 and you...

Hehe, you have AGA chipset in your A500 and you do not know it ;)
On real AGA the game activate 7 planes mode, the real deal is what write on lower screen part (ECS/1MB_chip: enhanced sound, AGA:...
Forum: Coders. Asm / Hardware 09 August 2020, 23:47
Replies: 69
Views: 3,120
Posted By ross
Nah, not bad at all :) 4 static, 7 updates...

Nah, not bad at all :)

4 static, 7 updates in chip mem.
My stupid calculations, seen over this results, seem quite sensible.
Consider that this is a bad situation to use copper to control the...
Forum: support.Games 09 August 2020, 23:02
Replies: 650
Views: 223,044
Posted By ross
Ok, patch done for Arcade Pool. All ECS...

Ok, patch done for Arcade Pool.
All ECS machines should now be supported (so removed the OCS-AGA tag, or was here for enhanced support on AGA?).

Into the Zone!
Please test.
Forum: support.Games 09 August 2020, 18:30
Replies: 650
Views: 223,044
Posted By ross
Then it's as I supposed. You can crash also...

Then it's as I supposed.

You can crash also WinUAE, just set a Quickstart A500 (512+512), then on chipset set "Full ECS".
WinUAE now set the LISAID as your real machine and crash.

I'll do a...
Forum: support.Games 09 August 2020, 16:37
Replies: 650
Views: 223,044
Posted By ross
There is a strange (bad..) memory assumption in...

There is a strange (bad..) memory assumption in this game based on LISAID check.

What is the exact configuration of your real A500? (chipset, chip/fast-mem)
Forum: Coders. Asm / Hardware 08 August 2020, 17:48
Replies: 69
Views: 3,120
Posted By ross
It's not simple but can be done :): ...

It's not simple but can be done :):
http://eab.abime.net/showpost.php?p=1315255&postcount=19

But the first option (panel to the left) it is definitely much more effective and doesn't bother you...
Forum: Coders. Asm / Hardware 08 August 2020, 15:26
Replies: 69
Views: 3,120
Posted By ross
I see 2 possibilities to do it safely even using...

I see 2 possibilities to do it safely even using DDFSTRT=$18:
- reversing the display panel position to the left (like Banshee do)
- using a three color single sprite
The panel is divided into...
Forum: Coders. Asm / Hardware 08 August 2020, 14:54
Replies: 69
Views: 3,120
Posted By ross
http://eab.abime.net/showthread.php?t=88062

http://eab.abime.net/showthread.php?t=88062
Forum: Coders. Asm / Hardware 03 August 2020, 23:15
Replies: 69
Views: 3,120
Posted By ross
To use only the lower part for the pointer...

To use only the lower part for the pointer registers, defining a fixed memory 'block' with the upper part (so actually is 64k boundaries, as a direct 16 bit value).
Forum: News 03 August 2020, 21:55
Replies: 68
Views: 3,383
Posted By ross
What bad guy you are :evilgrin Use the...

What bad guy you are :evilgrin

Use the sector label area to save the high-score, this way the ADF cannot maintain it but a real floppy :D
Forum: Coders. Asm / Hardware 03 August 2020, 19:34
Replies: 69
Views: 3,120
Posted By ross
CPU not having to wait, but copper yes :D

CPU not having to wait, but copper yes :D
Forum: Coders. Asm / Hardware 03 August 2020, 19:32
Replies: 69
Views: 3,120
Posted By ross
Since this is not the first time this case has...

Since this is not the first time this case has been dealt with and usually concerns the A500, could it be that only some old (Fat)Agnus revision has this problem?
The ECS and AGA machines seem...
Forum: Coders. Asm / Hardware 03 August 2020, 19:12
Replies: 69
Views: 3,120
Posted By ross
Where did you read such a thing? A blitter wait...

Where did you read such a thing?
A blitter wait is always mandatory before starting a new operation (nasty mode active or not, copper driven or not).
Forum: Coders. Asm / Hardware 03 August 2020, 17:52
Replies: 69
Views: 3,120
Posted By ross
Thanks, so some work for Toni ;) ...

Thanks, so some work for Toni ;)




There is a big difference.
When copper DMA fetches instruction/data from chip-memory, data is from now inside Agnus (copper MOVE already specifies a...
Forum: News 03 August 2020, 15:27
Replies: 68
Views: 3,383
Posted By ross
No, to a certain extent the two FS can live...

No, to a certain extent the two FS can live together.
So block 880 works for both.
And the regular DOS/0 file is really an (interesting!) trick :)



Ah, mr.spiv victory! Two disks required :)...
Forum: Coders. Asm / Hardware 03 August 2020, 15:16
Replies: 69
Views: 3,120
Posted By ross
You are absolutely right, it is impossible that...

You are absolutely right, it is impossible that the list is completely static and also that some of the fields are not modified.

So this is a difficult answer, real tests should be made and...
Forum: News 03 August 2020, 11:58
Replies: 68
Views: 3,383
Posted By ross
Yes, I had noticed it, a classy touch :cool

Yes, I had noticed it, a classy touch :cool
Forum: Coders. Asm / Hardware 03 August 2020, 08:27
Replies: 69
Views: 3,120
Posted By ross
Not from speed perspective (even if you are...

Not from speed perspective (even if you are correct from 'physical' accesses perspective, I've simplified to grasp the concept :))

Take this CMOVE, a blitter operation start: dc.w $0058,$0041
How...
Forum: News 02 August 2020, 23:27
Replies: 68
Views: 3,383
Posted By ross
I had a look at the ADF tonight. I like it! I...

I had a look at the ADF tonight. I like it!
I appreciate the protection, the file-system (a DOS/1 faked to be able to boot on KS1.x, I also did something similar in my tests :)),
the loader and...
Forum: Coders. Asm / Hardware 02 August 2020, 19:46
Replies: 69
Views: 3,120
Posted By ross
Unfortunately there is a big disadvantage in...

Unfortunately there is a big disadvantage in doing this: you cannot do sync effects with copper (well, there is a method to alleviate this but is a bit complex), because you cannot know where the...
Forum: Coders. Asm / Hardware 02 August 2020, 18:43
Replies: 69
Views: 3,120
Posted By ross
I really think so, especially if you have code in...

I really think so, especially if you have code in chip or slow ram.
Copper is very fast at writing in blitter registers, with only two bus/mem accesses.
Using 68000 code in a quick way: move.w...
Forum: Coders. Asm / Hardware 02 August 2020, 18:20
Replies: 12
Views: 1,051
Posted By ross
Thanks, concise and clear compendium.

Thanks, concise and clear compendium.
Forum: Coders. Asm / Hardware 02 August 2020, 18:03
Replies: 69
Views: 3,120
Posted By ross
More on what roondar wrote here. In this...

More on what roondar wrote here.

In this game the blitter objects would be better defined in the broad sense as "copper objects".
CPU 'construct' the copper list dynamically as a queue where next...
Forum: Coders. General 26 July 2020, 10:42
Replies: 54
Views: 8,362
Posted By ross
In code there is a check for index0 and a note...

In code there is a check for index0 and a note skip. So seems index for period extraction is shifted up by one. But I haven't checked all over.
Value repeated could be to help compressors, lz...
Forum: Coders. General 26 July 2020, 01:28
Replies: 54
Views: 8,362
Posted By ross
Code: ComputePeriods: ...

Code:
ComputePeriods:
lea mt_PeriodTable-Base(a4),a0
lea .seeds(pc),a1
moveq #0,d3
moveq #16-1,d5 ;16 tuning tables
.tloop:
move.w (a1)+,d0 ;get 'patched' semitone-up period *64...
Forum: Coders. General 25 July 2020, 23:36
Replies: 54
Views: 8,362
Posted By ross
Ok, I've extended the brute force method to the...

Ok, I've extended the brute force method to the full Period table and a common twelfth2 const exist!

$F1A8,$E2B4
$F1A8,$E159
$F1A8,$DF8C
$F1A8,$DE31
$F1A8,$DC64
$F1A8,$DAC2
$F1A8,$D977...
Forum: Coders. General 25 July 2020, 20:03
Replies: 54
Views: 8,362
Posted By ross
Maybe also something can be done for the 'seeds'....

Maybe also something can be done for the 'seeds'.
Fine semitones are all related.
And, as proved, some different 'twelfth root of 2' consts can be used.
Forum: Coders. General 25 July 2020, 19:48
Replies: 54
Views: 8,362
Posted By ross
Great! :great Just because I'm...

Great!

:great



Just because I'm curious and want to do a better and exhaustive answer to 8bitbubsy (and to me;)) I've made a check for the Blueberry's used values, and the the reason is less...
Forum: Coders. General 25 July 2020, 17:26
Replies: 54
Views: 8,362
Posted By ross
Wait... manually is boring ;) #$e2b3 is...

Wait... manually is boring ;)

#$e2b3 is simply what Siekmanski call BasePeriod_907 (/64 is 906.8 in this Blueberry's good approximation).
So a semitone upper the 856 base for PT.

#61865 is...
Forum: Coders. General 25 July 2020, 16:33
Replies: 54
Views: 8,362
Posted By ross
This is exactly what Siekmanski's code do ;)

This is exactly what Siekmanski's code do ;)
Forum: support.Hardware 25 July 2020, 12:00
Replies: 5
Views: 363
Posted By ross
Of course you can make it have higher horizontal...

Of course you can make it have higher horizontal frequencies (on AGA you can program it very freely and the limits are very mild) but the problem of the limited video bandwidth (28MHz) remain, so I...
Forum: support.Hardware 23 July 2020, 14:56
Replies: 10
Views: 457
Posted By ross
It can also be viewed online here:...

It can also be viewed online here: http://amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node00A4.html
not a very comfortable mode :)
Forum: support.Hardware 22 July 2020, 19:28
Replies: 5
Views: 363
Posted By ross
Sure you can: ...

Sure you can:
http://www.winnicki.net/amiga/memmap/VPOSR.html

Internal counter is 11 bit so a theoretical 2048 lines.
But of course the more lines you have the more the vertical frequency drops...
Forum: Amiga scene 22 July 2020, 18:54
Replies: 178
Views: 9,658
Posted By ross
:laughing :great

:laughing :great
Forum: Amiga scene 22 July 2020, 18:27
Replies: 178
Views: 9,658
Posted By ross
Do you like the Desert Apple? :cool

Do you like the Desert Apple?

:cool
Forum: Amiga scene 22 July 2020, 12:02
Replies: 178
Views: 9,658
Posted By ross
Thanks for the tests. Maybe soon a new...

Thanks for the tests.

Maybe soon a new teaser with the new encoding.
Forum: support.WinUAE 21 July 2020, 16:05
Replies: 8
Views: 785
Posted By ross
Hi, a question about the bettter handling for the...

Hi, a question about the bettter handling for the 60Hz resolution, by banging BEAMCON0 or faking with VHPOSW.

Usually I launch a Quickstart configuration, that open a windows in the default...
Forum: support.WinUAE 21 July 2020, 11:25
Replies: 33
Views: 1,033
Posted By ross
I'm eating apples. I found a bad one. :p

I'm eating apples.

I found a bad one.

:p
Forum: Amiga scene 20 July 2020, 21:37
Replies: 178
Views: 9,658
Posted By ross
No idea. If it support some raw formats, it...

No idea.
If it support some raw formats, it could be adapted.



:great
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