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Forum: Coders. Asm / Hardware Today, 16:02
Replies: 27
Views: 693
Posted By ross
Yeah :) Another interesting modality it...

Yeah :)

Another interesting modality it could have been copper with an extra instruction (and it wouldn't have been difficult to implement either): CMOVEM
Some bits in the upper part of the first...
Forum: Coders. Asm / Hardware Today, 10:14
Replies: 27
Views: 693
Posted By ross
Another yes and no :) What CIAB level 6...

Another yes and no :)

What CIAB level 6 interrupt do is use hsync to decrease the prescaler and trigger IRQ on underflow.
So you need the pre-sync the counter to a defined position, and anyway...
Forum: Coders. Asm / Hardware Today, 02:43
Replies: 27
Views: 693
Posted By ross
Well, yes and no. I would use the copper for...

Well, yes and no.

I would use the copper for *at least* 2 reasons:
- there is no possibility to execute the writing routine with the CPU if the blitter is active and in nasty mode (target seems...
Forum: Coders. Asm / Hardware Yesterday, 20:43
Replies: 27
Views: 693
Posted By ross
This always made me think about what a huge...

This always made me think about what a huge wasted opportunity in the design phase to use only the BPU bits and not a mask for selective activating the bpl DMA channels :rolleyes

EDIT:
removed my...
Forum: Coders. Asm / Hardware Yesterday, 19:07
Replies: 27
Views: 693
Posted By ross
There is also another trick you can use regarding...

There is also another trick you can use regarding bitplane pointers and that is to modify only the top of the register(s).
If the splitted bitmap is exactly 64k (or multiple) away from the value...
Forum: Coders. Asm / Hardware Yesterday, 18:51
Replies: 27
Views: 693
Posted By ross
Wise choice :)

Wise choice :)
Forum: Coders. Asm / Hardware Yesterday, 18:47
Replies: 27
Views: 693
Posted By ross
Or if you really like crazy stuff, do it with...

Or if you really like crazy stuff, do it with Copper+CPU ;)
Forum: Coders. Asm / Hardware 18 January 2022, 20:57
Replies: 21
Views: 738
Posted By ross
Not much. The first that come to mind: single...

Not much.
The first that come to mind: single stack (therefore less memory used theoretically), and direct usage of some privileged instuction, like MOVE SR, on 010+ processors, but this is bad...
Forum: Coders. Asm / Hardware 18 January 2022, 20:35
Replies: 21
Views: 738
Posted By ross
You need exec.library Supervisor() or...

You need exec.library Supervisor() or SuperState().
It is the only way to be sure of going into supervisor state on any processor.

Yes, many games/demos do it using a TRAP # instruction (or...
Forum: Coders. Asm / Hardware 18 January 2022, 20:00
Replies: 21
Views: 738
Posted By ross
Sure you can, many games/demos do it (disabling...

Sure you can, many games/demos do it (disabling SO of course) :)
Forum: Coders. Asm / Hardware 18 January 2022, 19:58
Replies: 21
Views: 738
Posted By ross
It is needed because 68040/060 is too fast (with...

It is needed because 68040/060 is too fast (with cache enabled and fast RAM) and the write to INTREQ don't reset physical CPU IPL lines (because Paula need a small delay to do it).
The second write...
Forum: Coders. Asm / Hardware 18 January 2022, 19:36
Replies: 21
Views: 738
Posted By ross
No, when in Supervisor state you can set SR I bit...

No, when in Supervisor state you can set SR I bit as you like, of course also outside the IRQ code.
This can be useful in the case of critical (and very quick to execute) code.
Forum: Coders. Asm / Hardware 18 January 2022, 19:29
Replies: 21
Views: 738
Posted By ross
It's a 3 bit mask that blocks IRQs of level <=...

It's a 3 bit mask that blocks IRQs of level <= than received on processor IPL pins.
Level 0 do not stop any IRQ from happening.
Level 7 cannot be avoided (Paula cannot generate it, you need an...
Forum: Coders. Asm / Hardware 18 January 2022, 19:05
Replies: 21
Views: 738
Posted By ross
While this usually works, I prefer through SR as...

While this usually works, I prefer through SR as it is 'immediate'.
INTENA use Paula that send signals to the CPU lines.
And we know that in fast machines many things could happens after the write...
Forum: Coders. Asm / Hardware 18 January 2022, 18:53
Replies: 21
Views: 738
Posted By ross
Simply raise CPU SR IPL, making the modification...

Simply raise CPU SR IPL, making the modification of shared parts atomic.

Example:

IRQ2_code:
move #$2300,SR
...
struct mods
...
move #$2200,SR
Forum: Coders. Asm / Hardware 16 January 2022, 13:06
Replies: 7
Views: 534
Posted By ross
BLTSIZE simply starts the DMA, for the specified...

BLTSIZE simply starts the DMA, for the specified amount of 16-bit words.
Which is the initial situation depends on the internal instantaneous content the registers have (which may or may not...
Forum: support.WinUAE 15 January 2022, 13:37
Replies: 3
Views: 237
Posted By ross
It is true that "Extreme" displays parts that are...

It is true that "Extreme" displays parts that are not normally visible, but in any case it requires adequate programming on the Amiga side.
Considering how complicated it is to properly fully manage...
Forum: support.WinUAE 13 January 2022, 23:06
Replies: 24
Views: 7,486
Posted By ross
Uh, I missed this post! Thanks Alpha One :)

Uh, I missed this post!
Thanks Alpha One :)
Forum: News 12 January 2022, 12:11
Replies: 90
Views: 5,082
Posted By ross
Really nice, congrats! :great

Really nice, congrats! :great
Forum: support.WinUAE 09 January 2022, 19:35
Replies: 120
Views: 16,650
Posted By ross
All certainly patchable, the problem is that for...

All certainly patchable, the problem is that for some of those games it could be long and tedious.. (even if the "glitch" seems minimal, there is not an immediate solution).
But I trust that sooner...
Forum: support.WinUAE 09 January 2022, 00:38
Replies: 120
Views: 16,650
Posted By ross
I can see it with Resolution:SuperHires/Subpixel...

I can see it with Resolution:SuperHires/Subpixel enabled.
If it's expected to be a quarter pixel on real AGA machines then it's correct.
It's just a matter of choosing whether to also view it in...
Forum: request.Old Rare Games 07 January 2022, 23:42
Replies: 10
Views: 721
Posted By ross
If it's repeatable signal it to Toni :) ...

If it's repeatable signal it to Toni :)
(indicating the exact conditions in which it occurs)
Forum: Amiga scene 07 January 2022, 21:42
Replies: 25
Views: 1,763
Posted By ross
Really sad news :sad R.I.P.

Really sad news :sad

R.I.P.
Forum: request.Old Rare Games 07 January 2022, 21:36
Replies: 10
Views: 721
Posted By ross
Zoned :)

Zoned :)
Forum: Coders. Asm / Hardware 06 January 2022, 15:29
Replies: 55
Views: 9,644
Posted By ross
Yep, I also noticed this damn bug. I solved it...

Yep, I also noticed this damn bug.
I solved it in the most drastic way in my version of WotD: completely removed RNC from it :) (nrv2x instead)

This has brought several advantages, which sooner...
Forum: Amiga scene 03 January 2022, 18:54
Replies: 28
Views: 2,672
Posted By ross
Yeah, nice release Sir Galahad! \O/ Even...

Yeah, nice release Sir Galahad! \O/


Even this crap is now available to everyone :)
And I well know how many headaches it managed to give, the coder has certainly achieved his goal..

Thanks...
Forum: Amiga scene 03 January 2022, 18:12
Replies: 36
Views: 2,750
Posted By ross
Awesome work StingRay! :great Can't wait to...

Awesome work StingRay! :great
Can't wait to read the cracking diary.

--
A couple of years ago I also slipped into the same rabbit hole (I just checked the folder, I started the work in July...
Forum: support.Hardware 26 December 2021, 19:20
Replies: 14
Views: 904
Posted By ross
Check this thread...

Check this thread https://eab.abime.net/showthread.php?t=107908 from message #8 onward.
There are a lot of similar arguments and test code.
Forum: Coders. Asm / Hardware 22 December 2021, 15:53
Replies: 13
Views: 1,457
Posted By ross
Sure yes, under the same conditions (number of...

Sure yes, under the same conditions (number of bitplanes, FMODE, copper wait position..).
Nothing changed between the various chipsets in this regard, so if the copper wakes up at the right time and...
Forum: Coders. Asm / Hardware 22 December 2021, 12:22
Replies: 13
Views: 1,457
Posted By ross
The key here is what Toni wrote in #2. When...

The key here is what Toni wrote in #2.

When the new 'Amiga' line starts (which is on the far right of the video) the comparison of BPLCON1 and hpos gets out of alignment.
This is because Denise's...
Forum: Coders. Asm / Hardware 10 December 2021, 19:28
Replies: 68
Views: 12,855
Posted By ross
Yes, bitcode is slightly different and end code...

Yes, bitcode is slightly different and end code marker is moved to literal run path.
Everything has been thought to be as fast as possible for 68k architecture (and it is much faster that original...
Forum: News 06 December 2021, 18:59
Replies: 56
Views: 5,161
Posted By ross
Oh, and ECS too :) PAL frequencies, new...

Oh, and ECS too :)

PAL frequencies, new WinUAE, physical ECS/OSSC, you can also fine-scroll it:
http://eab.abime.net/attachment.php?attachmentid=74004&stc=1&d=1638809770

Well, just because :D
Forum: Coders. General 06 December 2021, 17:47
Replies: 20
Views: 2,008
Posted By ross
For PAL: - 313 or 312 lines (dependeng on LOF,...

For PAL:
- 313 or 312 lines (dependeng on LOF, 313 is the Amiga default for 'progressive' mode), 625 in interlace mode (LOF auto-toggle)
- 227 DMA slots per line, 4 of which are unusable, for...
Forum: News 06 December 2021, 17:06
Replies: 56
Views: 5,161
Posted By ross
GREAT! :great

GREAT!
:great
Forum: Coders. General 06 December 2021, 17:03
Replies: 20
Views: 2,008
Posted By ross
Who stole a cycle !? ;) (usually 227-4 are...

Who stole a cycle !? ;) (usually 227-4 are available, per line)

Hi paraj!
I'm glad to see you around here more often lately.
:great
Forum: Retrogaming General Discussion 04 December 2021, 17:21
Replies: 4
Views: 621
Posted By ross
Problem here is a wrong support for KS2.0+. ...

Problem here is a wrong support for KS2.0+.
Quickly fixed also for AGA machines (trainer menu was unusable) and no more video garbage during first load.

Into the Zone!
Forum: HOL contributions 30 November 2021, 01:10
Replies: 19
Views: 4,061
Posted By ross
I only vaguely remember that over 95% (or more)...

I only vaguely remember that over 95% (or more) was completed, even the levels prone to crash (there were several annoying bugs, at least when in trainer mode).
And the scene after completing all...
Forum: Coders. Asm / Hardware 26 November 2021, 16:53
Replies: 68
Views: 12,855
Posted By ross
@introspec: thanks for the post (and welcome). ...

@introspec: thanks for the post (and welcome).
Your name ring me a bell.. probably I've seen you 'elsewhere' before :)

I'll check "salvador", but this sentence needs to be deepened:
"The...
Forum: News 26 November 2021, 00:22
Replies: 77
Views: 8,258
Posted By ross
My condolences on the passing of your father. ...

My condolences on the passing of your father.

RIP Jurgen.
Forum: support.Games 24 November 2021, 21:22
Replies: 21
Views: 2,474
Posted By ross
Those aren't pumpkins! They are forum people, you...

Those aren't pumpkins! They are forum people, you can clearly recognize some of us.
It's a memory photo :D
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