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Forum: Coders. Language Yesterday, 20:26
Replies: 12
Views: 286
Posted By roondar
Well, there is the Amiga Hardware Reference...

Well, there is the Amiga Hardware Reference Manual, but that is aimed 100% at low-level hardware access and tends to be coupled with assembly as a result. Using the info with C is possible, but...
Forum: Coders. Asm / Hardware Yesterday, 18:52
Replies: 43
Views: 1,450
Posted By roondar
Indeed, I like that idea too. Trying to get as...

Indeed, I like that idea too. Trying to get as many cycles on the bus used in a useful way as possible is the great challenge on the Amiga. This is why I originally tried to use Blitter interrupts in...
Forum: Coders. Language Yesterday, 16:46
Replies: 12
Views: 286
Posted By roondar
Indeed, if you wish to use a high level language...

Indeed, if you wish to use a high level language and you're comfortable with C/C++, I'd recommend Bebbo's GCC (or the other GCC environment aimed more at demo coding by Bartman).

If you do wish to...
Forum: Coders. Asm / Hardware Yesterday, 16:39
Replies: 43
Views: 1,450
Posted By roondar
I've found that generally speaking, the A500 can...

I've found that generally speaking, the A500 can push about the same number of Bobs (with three buffer restore) using Dual Playfield as it can on a 4 bitplane screen. The extra bitplane DMA used by...
Forum: Coders. Asm / Hardware Yesterday, 15:51
Replies: 43
Views: 1,450
Posted By roondar
Right, it is indeed hard to be exact without...

Right, it is indeed hard to be exact without measurements. Perhaps I should try it myself once to see how it goes. Thanks for your views though, they certainly sound reasonable.
Forum: Coders. General Yesterday, 13:24
Replies: 128
Views: 17,142
Posted By roondar
Yeah, it's always a question of optimising memory...

Yeah, it's always a question of optimising memory or speed. The Amiga is so flexible in terms of it's display that it becomes a giant (but ultimately IMHO satisfying) puzzle to try and solve.

I'm...
Forum: Coders. Asm / Hardware Yesterday, 13:20
Replies: 43
Views: 1,450
Posted By roondar
One thing I've never really been clear on is the...

One thing I've never really been clear on is the cost of updating the Copperlist.

It seems to me that any discussion on Copper blitting (as a way to gain performance) kind of glosses over the...
Forum: Coders. Asm / Hardware 02 August 2020, 12:54
Replies: 43
Views: 1,450
Posted By roondar
I'm not too sure of that actually. Coin ups...

I'm not too sure of that actually.

Coin ups generally use sprites, which tend to have easy to use coordinate systems already. For example: looking at the small amount of CPS1 documentation that...
Forum: Coders. Asm / Hardware 02 August 2020, 01:41
Replies: 43
Views: 1,450
Posted By roondar
Minor question: that article is still online on...

Minor question: that article is still online on my website, did you have problems reaching it? Or is there another reason you linked through web.archive.org?


AFAIK/IIRC they use at least three...
Forum: Retrogaming General Discussion 30 July 2020, 10:14
Replies: 54
Views: 1,876
Posted By roondar
The problem is apparently that RTG graphics on...

The problem is apparently that RTG graphics on the Amiga are still normally on a fairly slow bus, which means the gains over native graphics are going to be limited*. Doom really likes fast memory...
Forum: Coders. AMOS 30 July 2020, 10:05
Replies: 15
Views: 446
Posted By roondar
Like Thomas said, you probably meant Kickstart...

Like Thomas said, you probably meant Kickstart 37.175.
Kickstart revision 37.175 is version 2.04 or 2.05. Workbench revision 40.42 is version 3.1.

Now, I'm not entirely sure if Workbench 3.1 is...
Forum: Coders. AMOS 29 July 2020, 16:57
Replies: 15
Views: 446
Posted By roondar
The 0003 in the alert error message denotes the...

The 0003 in the alert error message denotes the problem lies with the OpenLibrary function. This makes me suspect the version of ed you're using may not be compatible with the Workbench and/or...
Forum: OT - General 28 July 2020, 11:58
Replies: 21
Views: 1,311
Posted By roondar
Cancel culture is not and never has been about...

Cancel culture is not and never has been about "calling people out". That already happened way before it.

Cancel culture is about forcefully silencing dissent on any topic the cancelers happen to...
Forum: support.Apps 28 July 2020, 10:01
Replies: 4
Views: 324
Posted By roondar
The ACA500+ uses a 68000 clocked at a higher...

The ACA500+ uses a 68000 clocked at a higher speed. FBlit requires a 68020 or above. Sadly it won't work with an ACA500+ unless you use it's option to attach a turbo card :(

Here's the minimum...
Forum: Amiga scene 26 July 2020, 17:56
Replies: 56
Views: 3,512
Posted By roondar
Both versions look similar to me. The main...

Both versions look similar to me. The main difference seems to be the background layer is now much more advanced with all kinds of line scrolling, etc added.

The parallax effects look awesome by...
Forum: Retrogaming General Discussion 26 July 2020, 17:50
Replies: 54
Views: 1,876
Posted By roondar
Yup, I've played DOOM on Amiga. Both using ADoom...

Yup, I've played DOOM on Amiga. Both using ADoom and DoomAttack. To be fair, I only first did that years after initial release though.

That said, it works better than I expected.
Forum: Coders. General 25 July 2020, 16:12
Replies: 128
Views: 17,142
Posted By roondar
Ah, the reason this isn't faster on OCS is...

Ah, the reason this isn't faster on OCS is because both the Blitter and CPU are limited to 16 bits per bus access*, so if you run both at the same time you're effectively just switching which chip...
Forum: Coders. General 25 July 2020, 13:16
Replies: 128
Views: 17,142
Posted By roondar
I love a good puzzle, so here's some idea's I...

I love a good puzzle, so here's some idea's I had. Obviously I haven't seen your code, so I may be saying things that are impractical or already being done. Still, I hope they might be helpful...
Forum: support.Hardware 23 July 2020, 13:44
Replies: 10
Views: 451
Posted By roondar
Sounds logical. Thanks for the info!

Sounds logical. Thanks for the info!
Forum: support.Hardware 23 July 2020, 13:24
Replies: 10
Views: 451
Posted By roondar
I'm not sure how it works internally in the chip,...

I'm not sure how it works internally in the chip, but the Hardware Reference Manual states:

So I guess there is some limitation in Denise which stops it from being possible. Perhaps someone else...
Forum: Nostalgia & memories 23 July 2020, 09:50
Replies: 216
Views: 20,237
Posted By roondar
Given this is literally the first time I've ever...

Given this is literally the first time I've ever heard it being called embarrassing by anyone, never had any non-Amiga user even bring this up when talking to me and never personally felt it at all...
Forum: Nostalgia & memories 22 July 2020, 15:32
Replies: 216
Views: 20,237
Posted By roondar
So to clarify: you're not talking about the OS,...

So to clarify: you're not talking about the OS, just the Workbench (i.e. GUI)?

Because in that case I agree with you and I also kind of disagree. As in: yes, I agree the Workbench (but not OS)...
Forum: Nostalgia & memories 22 July 2020, 14:59
Replies: 216
Views: 20,237
Posted By roondar
I do apologize, but that is kind of how I read...

I do apologize, but that is kind of how I read it. You seemed to imply that the Amiga lacked multithreading where it "actually counts" and seemingly compared that situation to co-operative...
Forum: Nostalgia & memories 22 July 2020, 14:37
Replies: 216
Views: 20,237
Posted By roondar
The Amiga OS is perfectly...

The Amiga OS is perfectly multitasking/multithreading as is. I can load a program while all my other programs still run and respond. The WB itself might not be, but that is ultimately pretty much...
Forum: Nostalgia & memories 22 July 2020, 13:43
Replies: 216
Views: 20,237
Posted By roondar
I read somewhere* that orange/white/blue/black is...

I read somewhere* that orange/white/blue/black is actually a very good colour combination (though you and I might disagree :D). It supposedly had to do with two things, the first was that these...
Forum: Retrogaming General Discussion 21 July 2020, 15:59
Replies: 57
Views: 4,529
Posted By roondar
Yes, that is exactly what it means :) For...

Yes, that is exactly what it means :)

For sprites, it means not only that they can be positioned and moved on 640/1280 pixel resolutions but also that they can be drawn as hires or superhires...
Forum: News 20 July 2020, 23:33
Replies: 263
Views: 27,870
Posted By roondar
Oh no, honestly I think it looks great. It...

Oh no, honestly I think it looks great. It certainly looks amazing when compared to many already existing Amiga beat em ups. In fact, I think that the overall high level of polish is why I noted the...
Forum: Retrogaming General Discussion 20 July 2020, 23:27
Replies: 31
Views: 1,196
Posted By roondar
Indeed! Next time, I'll try to make my "let's...

Indeed!
Next time, I'll try to make my "let's discuss the off-topic stuff I contributed to over here instead" thread a few posts earlier ;)
Forum: News 20 July 2020, 22:57
Replies: 263
Views: 27,870
Posted By roondar
I've been binging some metro siege videos on...

I've been binging some metro siege videos on YouTube. It's looking really polished so far!

Watching the last few videos, I did have a question or two about the art design (not criticisms, just...
Forum: Retrogaming General Discussion 20 July 2020, 22:48
Replies: 31
Views: 1,196
Posted By roondar
Well, I created this thread to try and channel...

Well, I created this thread to try and channel the off-topic stuff from the Metro Siege thread away from there, so I'm 100% fine with this solution :great

If you could be bothered, a minor note in...
Forum: Retrogaming General Discussion 19 July 2020, 21:25
Replies: 31
Views: 1,196
Posted By roondar
Interesting, do you have any info on how much...

Interesting, do you have any info on how much disk space you saved this way? I assume you packed the files and not all things needed to be flipped, so it probably wasn't half of the graphic size, but...
Forum: Nostalgia & memories 19 July 2020, 14:01
Replies: 216
Views: 20,237
Posted By roondar
I understand what you mean, I'm trying to explain...

I understand what you mean, I'm trying to explain that building this onto the motherboard in the way you described it is not actually easy.

Now, if you simply want to have a standard "side slot"...
Forum: Nostalgia & memories 19 July 2020, 11:22
Replies: 216
Views: 20,237
Posted By roondar
I think you're underestimating the cost of these...

I think you're underestimating the cost of these things.

Basically, the CPU would need to have a certain amount of lines connected to the trapdoor. But, these lines are already connected to the...
Forum: Retrogaming General Discussion 19 July 2020, 11:10
Replies: 31
Views: 1,196
Posted By roondar
Doesn't hardware flip only make sense if you want...

Doesn't hardware flip only make sense if you want to do it real time?

I'd say storing only one copy and flipping it via software after you load it is a simple and effective way of not needing to...
Forum: Retrogaming General Discussion 18 July 2020, 23:21
Replies: 57
Views: 4,529
Posted By roondar
Overkill is indeed fun to play, though defender...

Overkill is indeed fun to play, though defender type games are not my most favourite genre :)

Anyway, on AGA machines you can have super hires scrolling while the screen itself is still lowres....
Forum: Retrogaming General Discussion 18 July 2020, 20:48
Replies: 31
Views: 1,196
Posted By roondar
Yeah, that is the kind of tile use I expected to...

Yeah, that is the kind of tile use I expected to see. Cool image!

I'm pretty sure that the Metro Siege way is better suited for the Amiga as you certainly correct that adding too many Bobs to blit...
Forum: Retrogaming General Discussion 18 July 2020, 20:24
Replies: 33
Views: 1,934
Posted By roondar
Xenon wasn't that bad. But I didn't like Xenon...

Xenon wasn't that bad.
But I didn't like Xenon 2.
Forum: Nostalgia & memories 18 July 2020, 20:17
Replies: 216
Views: 20,237
Posted By roondar
There's nothing stopping you from adding fast...

There's nothing stopping you from adding fast memory to an A500 with an A590, it has support for on-board fast ram IIRC ;)
Forum: Nostalgia & memories 18 July 2020, 15:34
Replies: 216
Views: 20,237
Posted By roondar
Yup, it's a notable difference in terms of...

Yup, it's a notable difference in terms of motherboard layout for a small gain. Fast RAM is not panacea :p
Forum: Nostalgia & memories 18 July 2020, 15:12
Replies: 216
Views: 20,237
Posted By roondar
Yes it would've made a small difference but it...

Yes it would've made a small difference but it would also have meant making the motherboard quite a bit more complicated (on what bus do you want this memory?).

But more importantly, for 1985 the...
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