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Forum: Nostalgia & memories Yesterday, 18:28
Replies: 9
Views: 624
Posted By ross
Nothing special. The only thing I think in this...

Nothing special.
The only thing I think in this case makes the difference is the experience, which allowed me to do it in a short time.

What I did:
- with the debugger I found the loop in which...
Forum: Nostalgia & memories 25 January 2022, 23:54
Replies: 9
Views: 624
Posted By ross
Attached. I have absolutely no idea what I...

Attached.

I have absolutely no idea what I cracked :D
Completely removed the page with the code request.

Cheers!
Forum: Retrogaming General Discussion 25 January 2022, 15:06
Replies: 8
Views: 423
Posted By ross
It's probably just that the first program on the...

It's probably just that the first program on the disk isn't the executable you want to run

'*' wildcard means 'first file of the device'
',8' is the floppy device
',1' load it into the memory...
Forum: Coders. Blitz Basic 22 January 2022, 15:01
Replies: 7
Views: 468
Posted By ross
I know it might be a bit crude as a method, but I...

I know it might be a bit crude as a method, but I would just do a custom bootblock that somehow signals to the main executable that I started from floppy (AddPort() is fine too).
If I don't have the...
Forum: Coders. Asm / Hardware 22 January 2022, 13:54
Replies: 8
Views: 490
Posted By ross
Yep, zero it, disarm it or ..multiplex it as you...

Yep, zero it, disarm it or ..multiplex it as you like :)
(if you don't do it, every time the x position is reached on each line the sprite is re-displayed, hence the bar; Denise know nothing about...
Forum: Coders. Asm / Hardware 22 January 2022, 13:20
Replies: 8
Views: 490
Posted By ross
Problem here is that SPR7CTL disarm the sprite. ...

Problem here is that SPR7CTL disarm the sprite.
Reverse the write and make SPR7DATA as the last in line.
(plus what a/b said)
Forum: Coders. Asm / Hardware 22 January 2022, 00:53
Replies: 8
Views: 490
Posted By ross
Hi jotd, you mean that on the same line you also...

Hi jotd, you mean that on the same line you also have a sprite where the data for DATA and B are fetched by the DMA and displayed in a x-position early than 100?

Then you have to make sure that...
Forum: Coders. Asm / Hardware 21 January 2022, 16:27
Replies: 29
Views: 1,114
Posted By ross
Free chunky modes ;)

Free chunky modes ;)
Forum: Coders. Asm / Hardware 21 January 2022, 16:02
Replies: 29
Views: 1,114
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 21 January 2022, 10:14
Replies: 29
Views: 1,114
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 21 January 2022, 02:43
Replies: 29
Views: 1,114
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 20 January 2022, 20:43
Replies: 29
Views: 1,114
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 20 January 2022, 19:07
Replies: 29
Views: 1,114
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 20 January 2022, 18:51
Replies: 29
Views: 1,114
Posted By ross
Wise choice :)

Wise choice :)
Forum: Coders. Asm / Hardware 20 January 2022, 18:47
Replies: 29
Views: 1,114
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: 934
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: 934
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: 934
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: 934
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: 934
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: 934
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: 934
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: 934
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: 8
Views: 732
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: 293
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: 7,600
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: 98
Views: 6,253
Posted By ross
Really nice, congrats! :great

Really nice, congrats! :great
Forum: support.WinUAE 09 January 2022, 19:35
Replies: 141
Views: 21,309
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: 141
Views: 21,309
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: 773
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: 1,870
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: 773
Posted By ross
Zoned :)

Zoned :)
Forum: Coders. Asm / Hardware 06 January 2022, 15:29
Replies: 55
Views: 9,780
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: 2,782
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: 2,931
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: 924
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: 1,516
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: 1,516
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: 12,968
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: 5,288
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
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