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Search: Posts Made By: roondar
Forum: Coders. General Today, 09:54
Replies: 63
Views: 3,128
Posted By roondar
Indeed, it's of course always better to have a...

Indeed, it's of course always better to have a faster algorithm. But if you can't avoid it somehow, on the low end Amiga's you can still partially mitigate the cost by doing what I pointed out. That...
Forum: Coders. General Today, 00:52
Replies: 63
Views: 3,128
Posted By roondar
On the Amiga, such expensive instructions can...

On the Amiga, such expensive instructions can still be useful if you're using the chipset as well and aren't running on a fast CPU with Fast RAM. A simple trick would be to run one or more (big)...
Forum: Amiga scene Today, 00:10
Replies: 75
Views: 6,373
Posted By roondar
The screenshot doesn't work because the server...

The screenshot doesn't work because the server certificate is expired. So most browsers just won't load it. After I manually accepted the expired certificate, the image shows up just fine :great
...
Forum: Coders. Asm / Hardware Yesterday, 17:01
Replies: 14
Views: 346
Posted By roondar
For the 68000 I do know that it's indeed the same...

For the 68000 I do know that it's indeed the same speed for both move.w/add.w/lea.w/etc to an address register and move.l/add.l/lea.l/etc.

On the topic of LEA, while move.l #<label>,a0 and lea.l...
Forum: Coders. General Yesterday, 16:56
Replies: 63
Views: 3,128
Posted By roondar
It may be my 68020 is still a bit weak (I don't...

It may be my 68020 is still a bit weak (I don't know all the instructions by heart yet), but in my test I used the following two forms:

divu.l d0,d1
divul.l d0,d1:d2

And that...
Forum: Coders. Asm / Hardware 04 May 2021, 18:19
Replies: 92
Views: 2,724
Posted By roondar
I'd argue that most hobbies are not about sanity...

I'd argue that most hobbies are not about sanity :D
Anyway, what I meant was hopefully clear? By overstating that part of my reply, I was trying to point out that the reactions about this topic have...
Forum: Coders. Asm / Hardware 04 May 2021, 17:42
Replies: 92
Views: 2,724
Posted By roondar
You know he knows how to get alignment right...

You know he knows how to get alignment right because you know that AGA displays won't actually work if misaligned.
You're now claiming that you don't know how to set the alignment? You do realize...
Forum: Coders. Asm / Hardware 04 May 2021, 16:29
Replies: 92
Views: 2,724
Posted By roondar
That'd be the part where you knowingly told a...

That'd be the part where you knowingly told a falsehood. I pointed out which part was false and how I know you actually are aware it's false twice now. So, for the last time: you claimed "chances are...
Forum: Coders. Asm / Hardware 04 May 2021, 14:31
Replies: 92
Views: 2,724
Posted By roondar
It's a false statement, because McGeezer already...

It's a false statement, because McGeezer already knows how to align bitmaps and you do know this given he's released AGA software before. Worse, it rather arrogantly assumes "chances are" he'll have...
Forum: Coders. General 04 May 2021, 13:37
Replies: 63
Views: 3,128
Posted By roondar
It's not really poor code that's the problem....

It's not really poor code that's the problem. Processors beyond the 68000/68010/80386 are hard to emulate because they have cache memory and instruction speed that varies depending on the instruction...
Forum: Coders. Asm / Hardware 04 May 2021, 13:29
Replies: 92
Views: 2,724
Posted By roondar
I already did. "Then chances are that the...

I already did.

"Then chances are that the alignment isn't right." is false. And as an OS coder, you know it is false because he can't display working screens at all if the alignment it wrong (and...
Forum: Coders. Asm / Hardware 04 May 2021, 12:56
Replies: 92
Views: 2,724
Posted By roondar
I didn't ask a question about using the OS, I...

I didn't ask a question about using the OS, I observed you routinely tell people falsehoods about accessing the hardware directly and wondered aloud why you keep doing that.
Which is fair enough,...
Forum: Coders. Asm / Hardware 04 May 2021, 12:34
Replies: 92
Views: 2,724
Posted By roondar
Let's see... One is a programming style that you...

Let's see... One is a programming style that you can disagree with, but that is actually quite defensible in the current context (which you didn't even attempt to understand).

The other is a...
Forum: Coders. Asm / Hardware 04 May 2021, 11:59
Replies: 92
Views: 2,724
Posted By roondar
Alignment requirements are hardly rocket science....

Alignment requirements are hardly rocket science. They're also well documented. And getting them wrong instantly results in a corrupted screen.

You do this a lot with regards to OCS/ECS/AGA...
Forum: Coders. General 04 May 2021, 10:02
Replies: 63
Views: 3,128
Posted By roondar
Ah, perhaps I should've specified this. But my...

Ah, perhaps I should've specified this. But my test results were specifically for the 68020 only, as that is what litwr was talking about.
So for the record: my test was done on a stock Amiga 1200,...
Forum: Coders. General 03 May 2021, 20:47
Replies: 63
Views: 3,128
Posted By roondar
Right, just because I'm really rather interested...

Right, just because I'm really rather interested in the Motorola 68K architecture, I did a few minor tests using extremely simple code I executed while all interrupts and the screen were disabled. I...
Forum: Coders. General 03 May 2021, 16:42
Replies: 63
Views: 3,128
Posted By roondar
Best case through worst case in those diagrams...

Best case through worst case in those diagrams only refer to time with instruction overlap/no overlap but in cache/no overlap not in cache*. They do not refer to the differences in timing for DIV/MUL...
Forum: Coders. General 03 May 2021, 15:53
Replies: 63
Views: 3,128
Posted By roondar
Regarding the timings of instructions, It should...

Regarding the timings of instructions, It should be pointed out that the timings in the Motorola manuals for the DIV and MUL instructions represent the maximum number of cycles they can take*, not...
Forum: Amiga scene 02 May 2021, 21:19
Replies: 759
Views: 137,521
Posted By roondar
Those textures look extremely good, can't wait...

Those textures look extremely good, can't wait for more updates :)
Forum: Coders. Asm / Hardware 30 April 2021, 16:36
Replies: 9
Views: 688
Posted By roondar
You can update the Copperlist whenever you...

You can update the Copperlist whenever you desire, there is no lockout (though if you update the Copper at the wrong time, you may see some display glitches). It should definitely not crash the...
Forum: Amiga scene 29 April 2021, 17:35
Replies: 759
Views: 137,521
Posted By roondar
Finally watched the video. Nice work with the...

Finally watched the video. Nice work with the positional audio. That's quite cool and it works really well as you show. Also love all the sound options you're adding to the menu :D

---

I feel...
Forum: support.WinUAE 29 April 2021, 14:54
Replies: 15
Views: 649
Posted By roondar
Yes, it's true that some software doesn't like an...

Yes, it's true that some software doesn't like an extremely fast CPU. Luckily, you can always create a secondary (or third, etc) WinUAE config that is the same but with a slower CPU setting :)
Forum: support.WinUAE 29 April 2021, 13:20
Replies: 15
Views: 649
Posted By roondar
As far as I know, the only thing needed to keep...

As far as I know, the only thing needed to keep the chipset (i.e. OCS/ECS/AGA) cycle accurate is enabling cycle accurate for the chipset itself.

The processor speed, however, is not going to be...
Forum: support.WinUAE 29 April 2021, 12:13
Replies: 15
Views: 649
Posted By roondar
The thing is that cycle exact only really applies...

The thing is that cycle exact only really applies to the AGA chipset for AGA machines, the 68020 (and 030/040/060) CPU speed isn't emulated completely accurately because of difficulties in figuring...
Forum: Amiga scene 29 April 2021, 10:39
Replies: 75
Views: 6,373
Posted By roondar
I've seen various posts about the interlace mode...

I've seen various posts about the interlace mode used. Now, I've actually ran TS beta/demo on my real A1200 and WinUAE, so I may be able to clear some small things up.

On my Philips CM8833 CRT,...
Forum: Amiga scene 28 April 2021, 22:26
Replies: 75
Views: 6,373
Posted By roondar
Looking forward to buying the full game :)

Looking forward to buying the full game :)
Forum: Coders. General 28 April 2021, 22:25
Replies: 215
Views: 38,972
Posted By roondar
Now, this won't be a secret or anything - but I...

Now, this won't be a secret or anything - but I can't wait to see and play the result :)
Forum: project.Amiga Game Factory 27 April 2021, 17:11
Replies: 91
Views: 6,691
Posted By roondar
Cool project, it's way further along than I had...

Cool project, it's way further along than I had guessed from your OP :)

Nice to see others use my mixer, that was really what I was hoping for when I made it :great
Forum: Coders. Asm / Hardware 26 April 2021, 13:58
Replies: 13
Views: 642
Posted By roondar
On the topic of CPU specific code, it might be...

On the topic of CPU specific code, it might be worth pointing out you can also use a VASM directive for that in your code.

mc68010 ; Now 68010 instructions are recognised
<<awesome 68010...
Forum: Coders. General 26 April 2021, 12:11
Replies: 107
Views: 10,329
Posted By roondar
This has been a consistent pattern for litwr. And...

This has been a consistent pattern for litwr. And he tends to not actually change his mind all that much when the facts disagree with his opinions. Just look at this thread for some examples. The...
Forum: Coders. Blitz Basic 25 April 2021, 16:26
Replies: 5
Views: 262
Posted By roondar
You can use such a method to time, but it works...

You can use such a method to time, but it works best if you synchronise it to a specific position on the raster so that the bars always start at the same point. Obviously, if you have to specifically...
Forum: Amiga scene 23 April 2021, 11:42
Replies: 22
Views: 2,088
Posted By roondar
Look, I get this idea and I actually agree with...

Look, I get this idea and I actually agree with it. Trying out stuff to see how to make it work is definitely very much Amiga. And I agree that you can probably get something to work in some fashion...
Forum: Coders. Asm / Hardware 22 April 2021, 09:33
Replies: 25
Views: 1,061
Posted By roondar
Yeah, that's PHX's player :great

Yeah, that's PHX's player :great
Forum: Coders. Asm / Hardware 17 April 2021, 15:30
Replies: 15
Views: 787
Posted By roondar
Setting aside the question of why you'd want this...

Setting aside the question of why you'd want this or not want this, doesn't the code do exactly what you ask for?

If I'm reading this correctly, .notfirstblock is exactly six words away from the...
Forum: Coders. Blitz Basic 16 April 2021, 10:11
Replies: 41
Views: 2,626
Posted By roondar
I'm not 100% sure on this, but I seem to recall...

I'm not 100% sure on this, but I seem to recall that the original Arcade GFX used more than 16 colours per layer. So if you do go the Arcade GFX route, be aware you might need to colour reduce them....
Forum: Coders. Asm / Hardware 15 April 2021, 15:41
Replies: 10
Views: 789
Posted By roondar
That's the tunnel effect, the OP is talking about...

That's the tunnel effect, the OP is talking about the Star Wars style scroller ;)
Forum: Retrogaming General Discussion 15 April 2021, 14:53
Replies: 67
Views: 4,252
Posted By roondar
Nope, no zoom. I guess you could fake a 'vertical...

Nope, no zoom. I guess you could fake a 'vertical scale up' by doing several blits with a larger than normal destination modulo and then offsetting their starting points, but that's not HW zoom.
Forum: Coders. Asm / Hardware 14 April 2021, 17:22
Replies: 13
Views: 670
Posted By roondar
I really need to start looking into Sxx more...

I really need to start looking into Sxx more often. I fear I've rather underutilized these instructions so far and seeing the above example that is clearly a shame!
Forum: Coders. Asm / Hardware 14 April 2021, 17:05
Replies: 13
Views: 670
Posted By roondar
Yup, I can type really quite quickly :p

Yup, I can type really quite quickly :p
Forum: Coders. Asm / Hardware 14 April 2021, 16:31
Replies: 13
Views: 670
Posted By roondar
I couldn't help myself and tested it just now. It...

I couldn't help myself and tested it just now. It does indeed seem to work correctly in all cases (assuming I haven't missed one).
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