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Search took 0.08 seconds. Search: Posts Made By: Jobbo
Forum: Coders. Asm / Hardware Yesterday, 18:02
Replies: 3
Views: 146
Posted By Jobbo
Backslide to Arcanum - Cosmic Orbs - Tech details

Hi there,

I recently wrote up some technical details about the demo I coded for Revision 2024.

I don't think many people will see it otherwise, so I'm sharing it here where some of you might...
Forum: Coders. Asm / Hardware 12 March 2024, 15:04
Replies: 12
Views: 668
Posted By Jobbo
That matches what I'm seeing, thanks.

That matches what I'm seeing, thanks.
Forum: Coders. Asm / Hardware 12 March 2024, 14:49
Replies: 12
Views: 668
Posted By Jobbo
Narrow display fetch question.

Is it possible to set up ddfstrt and ddfstop so the display is only 16 pixels wide?
Forum: Coders. Asm / Hardware 08 January 2024, 21:05
Replies: 79
Views: 13,495
Posted By Jobbo
That makes sense. And if so then since those are...

That makes sense. And if so then since those are just copy blits they're not going to be super expensive.
Forum: Coders. Asm / Hardware 08 January 2024, 15:36
Replies: 79
Views: 13,495
Posted By Jobbo
This looks really nice! I'm curious how...

This looks really nice!

I'm curious how you've handled the blitting so it avoids fringing.

Normally the right edges would start a fringe unless the background pixel is using an indexed color.
...
Forum: support.WinUAE 18 December 2023, 04:33
Replies: 9
Views: 1,437
Posted By Jobbo
Thanks Toni What I'm doing seems to be...

Thanks Toni

What I'm doing seems to be working just fine for me for an A500 1meg.

I'm doing some simple synchronization in my Amiga code and the tool code so it'll pause my routine and that...
Forum: support.WinUAE 06 December 2023, 17:49
Replies: 9
Views: 1,437
Posted By Jobbo
Separately, it is eventually going to be...

Separately, it is eventually going to be problematic that my app is changing WinUAE's Amiga memory under its nose.

Is there any synchronization method already present that I could take advantage...
Forum: support.WinUAE 06 December 2023, 17:46
Replies: 9
Views: 1,437
Posted By Jobbo
I'm really only concerned with stock A500 + 0.5mb...

I'm really only concerned with stock A500 + 0.5mb expansion at the moment.

I won't be using JIT.

Is it reasonable to assume the 0.5mb of chip is contiguous and separately so is the 0.5mb of...
Forum: support.WinUAE 06 December 2023, 05:20
Replies: 9
Views: 1,437
Posted By Jobbo
I'm actually looking at this now. I've written my...

I'm actually looking at this now. I've written my own app which will read the WinUAE memory and find some specifically tagged memory string. When I find that I assume that it's my data structure I...
Forum: Coders. Asm / Hardware 17 November 2023, 03:30
Replies: 9
Views: 1,235
Posted By Jobbo
I think they customized fs-use. I like the...

I think they customized fs-use.

I like the memory protection idea though. Would be a great addition to Bartman’s tool chain!
Forum: Coders. Asm / Hardware 15 November 2023, 03:53
Replies: 9
Views: 1,235
Posted By Jobbo
“Is Handmade Seattle live-streamed? Yes. We...

“Is Handmade Seattle live-streamed?
Yes. We stream the entire conference for free on this website and Twitch as backup. Official discussions, however, are gated behind a private chat server: you’ll...
Forum: Coders. Asm / Hardware 14 November 2023, 23:38
Replies: 9
Views: 1,235
Posted By Jobbo
Eon TBL tech talk tomorrow

I noticed Dep/TBL (Andreas Fredriksson) is giving a talk at the below link tomorrow, could be interesting to some people here.



https://handmadecities.com/seattle/
Forum: Retrogaming General Discussion 10 November 2023, 17:56
Replies: 85
Views: 7,890
Posted By Jobbo
Arabian Nights was excellent! It's dual-playfield...

Arabian Nights was excellent! It's dual-playfield everywhere even without the parallax.

That lets the main sprite sit in-between foreground and background tiles. It also makes it faster to restore...
Forum: Coders. Asm / Hardware 09 November 2023, 13:33
Replies: 4
Views: 686
Posted By Jobbo
Edit: Actually the question seems to be about...

Edit: Actually the question seems to be about whether it’ll break things. And as mentioned it cannot. My response is just about performance.

I wouldn’t be so sure this is not a problem.

What...
Forum: Coders. Asm / Hardware 13 October 2023, 23:58
Replies: 51
Views: 4,413
Posted By Jobbo
That takes too much memory and is of course only...

That takes too much memory and is of course only for lamers!
Forum: Coders. Asm / Hardware 04 October 2023, 16:23
Replies: 51
Views: 4,413
Posted By Jobbo
As far as I can tell Chaos was referring to using...

As far as I can tell Chaos was referring to using 16.16 fixed point math, but it's not the same kind of code at all for that effect.

What the comment does hint at is the need for better precision,...
Forum: Coders. Asm / Hardware 03 October 2023, 00:08
Replies: 51
Views: 4,413
Posted By Jobbo
Yes it does magnify, just not very nicely. So...

Yes it does magnify, just not very nicely. So it's probably work clarifying that what I would like is for it to do so without breaking up and looking bad.
Forum: Coders. Asm / Hardware 02 October 2023, 22:45
Replies: 51
Views: 4,413
Posted By Jobbo
So, what pretty much every implementation has in...

So, what pretty much every implementation has in common (with the exception of Britelite's code) is that they breakdown when the underlying texture is magnified.

They're all pretty much doing the...
Forum: Coders. Asm / Hardware 23 September 2023, 22:52
Replies: 8
Views: 738
Posted By Jobbo
Well, I'm relieved you didn't link to an answer...

Well, I'm relieved you didn't link to an answer you already gave me once before :) I can't remember what I've already asked!

This little quirky bug has been plaguing me for a long time. So glad I...
Forum: Coders. Asm / Hardware 23 September 2023, 21:00
Replies: 8
Views: 738
Posted By Jobbo
Thanks Toni!

Thanks Toni!
Forum: Coders. Asm / Hardware 23 September 2023, 20:40
Replies: 8
Views: 738
Posted By Jobbo
But, I would have expected issues using other...

But, I would have expected issues using other lines numbers if it's purely the atomic read issue, so not completely convinced.
Forum: Coders. Asm / Hardware 23 September 2023, 20:38
Replies: 8
Views: 738
Posted By Jobbo
That explains it! How then do I do the same thing...

That explains it! How then do I do the same thing properly?
Forum: Coders. Asm / Hardware 23 September 2023, 19:29
Replies: 8
Views: 738
Posted By Jobbo
Possibly dumb WaitVbl question.

I've been using some simple test code to wait for a vbl which seemed to work okay but not 100%.

I don't understand why so maybe someone can explain?

The code is in C and it's just this:

...
Forum: Coders. Asm / Hardware 23 September 2023, 15:32
Replies: 50
Views: 4,589
Posted By Jobbo
JFC get back to your own thread! I take it back,...

JFC get back to your own thread! I take it back, the quiet was better than this nonsense!
Forum: Coders. Asm / Hardware 23 September 2023, 13:25
Replies: 51
Views: 4,413
Posted By Jobbo
I’d forgotten about that one Dan! I’ll have a...

I’d forgotten about that one Dan! I’ll have a poke at the code!
Forum: Coders. Asm / Hardware 22 September 2023, 23:08
Replies: 51
Views: 4,413
Posted By Jobbo
Yes, your version I can appreciate. But only...

Yes, your version I can appreciate. But only despite the targigrade! ;)

I think it's worthy of a re-release with a more attractive image and maybe some different effects that wouldn't be so easy...
Forum: Coders. Asm / Hardware 22 September 2023, 21:58
Replies: 50
Views: 4,589
Posted By Jobbo
Photon, that definitely all true!!! On Amiga...

Photon, that definitely all true!!!

On Amiga I use C for my own productivity given the limited time I have and the sorts of things I'd like to make.

But absolutely it'll bite you hard at times....
Forum: Coders. Asm / Hardware 21 September 2023, 22:52
Replies: 51
Views: 4,413
Posted By Jobbo
I would not have spotted the alternate line trick...

I would not have spotted the alternate line trick but now it makes more sense. Thought you'd found a second blitter hiding somewhere on the OCS!
Forum: Coders. Asm / Hardware 21 September 2023, 18:56
Replies: 51
Views: 4,413
Posted By Jobbo
Very cool. Is that effectively displaying 4x2...

Very cool. Is that effectively displaying 4x2 pixels? So it's 64x128? That sounds like a lot?
Forum: Coders. Asm / Hardware 21 September 2023, 15:52
Replies: 51
Views: 4,413
Posted By Jobbo
Roondar, I've seen your video and writings on...

Roondar, I've seen your video and writings on chunky screen modes and appreciated them! Very nicely put together.

The effects themselves are as you noted limited in precision with the brute-force...
Forum: Coders. Asm / Hardware 21 September 2023, 13:06
Replies: 51
Views: 4,413
Posted By Jobbo
Wow! Awesome approach. Would not have considered...

Wow! Awesome approach. Would not have considered it possible to use the blitter and modulo for interpolation. Very cool!
Forum: Coders. Asm / Hardware 20 September 2023, 19:30
Replies: 50
Views: 4,589
Posted By Jobbo
I like it too, but unfortunately that doesn't...

I like it too, but unfortunately that doesn't seem to be what constexpr does every time.
Seems it’s only a suggestion that the compiler might ignore at any point.
Forum: Coders. Asm / Hardware 20 September 2023, 16:24
Replies: 50
Views: 4,589
Posted By Jobbo
Not that much as it turns out: - const all...

Not that much as it turns out:

- const all the things
- constexpr/inlines/templates where possible instead of defines
- template functions in some specific cases where the variants use different...
Forum: Coders. Asm / Hardware 19 September 2023, 23:31
Replies: 11
Views: 713
Posted By Jobbo
Is a6 getting borked by an interrupt and not...

Is a6 getting borked by an interrupt and not restored properly? Just a guess.
Forum: Coders. Asm / Hardware 19 September 2023, 20:21
Replies: 51
Views: 4,413
Posted By Jobbo
Nope, I'm not getting it. That seems like it just...

Nope, I'm not getting it. That seems like it just creates a table of:



0x0000 ... x512
0x0100 ... x512
0x0200 ... x512
.
.
.
Forum: Coders. Asm / Hardware 19 September 2023, 12:52
Replies: 51
Views: 4,413
Posted By Jobbo
Oh it’s you Britelite. Hello! Nice rotator. Am I...

Oh it’s you Britelite. Hello! Nice rotator. Am I right? When and how are the tables built?
Forum: Coders. Asm / Hardware 19 September 2023, 12:50
Replies: 51
Views: 4,413
Posted By Jobbo
From what I can tell there is no real-time...

From what I can tell there is no real-time interpolation for that ham mode rotator. So I’d guess the blitter is partly being used to copy precomputed offsets into the move instructions for the next...
Forum: Coders. Asm / Hardware 19 September 2023, 12:43
Replies: 50
Views: 4,589
Posted By Jobbo
What have I done! There’s two now!

What have I done! There’s two now!
Forum: Coders. Asm / Hardware 19 September 2023, 00:08
Replies: 50
Views: 4,589
Posted By Jobbo
Oh no you don't!! Don't bring that stuff in...

Oh no you don't!! Don't bring that stuff in here!!

I write my A500 stuff in C++ (with templates even!) and also assembler. So let that melt your brains. It's almost like you can actually do both!!...
Forum: Coders. Asm / Hardware 18 September 2023, 23:59
Replies: 51
Views: 4,413
Posted By Jobbo
Mr.Spiv that sounds exactly like the one at the...

Mr.Spiv that sounds exactly like the one at the end of this intro: https://www.pouet.net/prod.php?which=9268

Should have also said yours is very cool! As is this one, I didn't check if you wrote...
Showing results 1 to 40 of 387
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