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Forum: Nostalgia & memories Yesterday, 23:16
Replies: 15
Views: 459
Posted By sparhawk
Elfmania looks really cool. That's definitely...

Elfmania looks really cool. That's definitely some kind of game I would have ecpected from an machine like Amiga. :)
Forum: Coders. Asm / Hardware Yesterday, 18:19
Replies: 4
Views: 174
Posted By sparhawk
Is this a bug in EASy68K?

When writing a function I stumbled on this, and did a small test to confirm:




move.l #$abababab,d1
movem.w d1,-(sp)
movem.w (sp)+,d1 ; d1 now contains $ffffabab
Forum: Coders. Asm / Hardware Yesterday, 18:12
Replies: 17
Views: 357
Posted By sparhawk
Cool! :great Your are farther than me. :) I'm...

Cool! :great Your are farther than me. :) I'm working on helper functions, but drawing a line and going to an animated BLOB from there, is next on my list. :D
Forum: Coders. Asm / Hardware Yesterday, 14:41
Replies: 17
Views: 357
Posted By sparhawk
It's not related to AGA, but to the CPU. I think...

It's not related to AGA, but to the CPU. I think 68020+ probably.

Is there some good M68k instruction manual? The one I currently use (M68000PRM.pdf) doesn't seem to mention this multiplier even...
Forum: Nostalgia & memories 21 January 2020, 19:50
Replies: 15
Views: 459
Posted By sparhawk
I remember when I played DOTC and I was really...

I remember when I played DOTC and I was really blown away. I guess for todays standards, it offers a rather limited gameplay, but I have good memories of it. :D
Don't know Lost Patrols, I'll check...
Forum: Retrogaming General Discussion 21 January 2020, 18:04
Replies: 4,106
Views: 718,251
Posted By sparhawk
Playing "Call of Chtuhlu" on the switch. I like...

Playing "Call of Chtuhlu" on the switch. I like it a lot, and I sure don't know why it get so many bad comments in the mags, because I think that it captures the spirit and the atmosphere of the...
Forum: Nostalgia & memories 21 January 2020, 17:18
Replies: 249
Views: 58,551
Posted By sparhawk
As long as you have full control over the...

As long as you have full control over the machine, you can't prevent cracking. For example, if you take games like Diablo 3, it's quite different, because part of the code is not even on your...
Forum: Coders. Asm / Hardware 21 January 2020, 16:46
Replies: 4
Views: 364
Posted By sparhawk
How is that identified? I suppose it's some...

How is that identified? I suppose it's some interrupt that triggers. That's probably a feature which may not just be interesting to the GUI debugger, but the regular one as well.
Forum: Nostalgia & memories 21 January 2020, 16:39
Replies: 15
Views: 459
Posted By sparhawk
Original dedicated games on Amiga

Some days ago I was browsing through games and had somehow the impression that there are many games which are just poor ports from somewhere else, and don't even do justice to the power that the...
Forum: Nostalgia & memories 21 January 2020, 13:56
Replies: 249
Views: 58,551
Posted By sparhawk
I always wondered about that. I thought, that, if...

I always wondered about that. I thought, that, if I wold write a protected game, I would also trigger the copy protection such that an important item is missing. Like a key to open the door to the...
Forum: Nostalgia & memories 20 January 2020, 23:33
Replies: 249
Views: 58,551
Posted By sparhawk
On C64 there was some like this: label: jmp...

On C64 there was some like this:

label: jmp label


Which just could be nop-ed. :)

I was so baffled when I saw that, that I couldn't believe it. Like they invested probably a good sum in...
Forum: Nostalgia & memories 20 January 2020, 22:22
Replies: 249
Views: 58,551
Posted By sparhawk
I wonder if "Little Computer People" from EA was...

I wonder if "Little Computer People" from EA was hard to crack on Amiga. I cracked it on C64 and was surprised how easy it was (took me about 20 minutes or so). A friend gave it to me under the...
Forum: Coders. General 19 January 2020, 19:28
Replies: 9
Views: 357
Posted By sparhawk
I was thinking of creating a project thread, once...

I was thinking of creating a project thread, once it is so far along, that I can actually show something, and it becomes clearer that I actually will do it. :D I have created enough projects where I...
Forum: Coders. General 19 January 2020, 17:25
Replies: 9
Views: 357
Posted By sparhawk
Some cool games as I can see.:great I doubt...

Some cool games as I can see.:great

I doubt that I will manage to create something up to those standards, but I'll try my best. :D
Forum: Coders. General 19 January 2020, 16:11
Replies: 9
Views: 357
Posted By sparhawk
I wanted to do a port of Choplifter. i figured...

I wanted to do a port of Choplifter. i figured that the game mechanics is rather simple, so it might be a good project to learn the basics, and develop all the functions that I need, like loading...
Forum: Coders. General 19 January 2020, 00:51
Replies: 4
Views: 193
Posted By sparhawk
Might be usefull. Can you post the code when you...

Might be usefull. Can you post the code when you have access again?
Forum: Coders. General 18 January 2020, 21:19
Replies: 9
Views: 357
Posted By sparhawk
Ahh! That's of course quite a difference. :D...

Ahh! That's of course quite a difference. :D Totally forgot that there is not one Byte per Pixel.
Forum: Coders. General 18 January 2020, 21:00
Replies: 9
Views: 357
Posted By sparhawk
How man bitplances for a game

When I create a screen on PAL with 5 Bitmaps, it means that already 400kb of Chipmem are gone (320x256x5). Is this a realistic/usefull setup, or do games usually create smaller screens because of...
Forum: Graphics 15 January 2020, 21:25
Replies: 3
Views: 145
Posted By sparhawk
Yes! That was the site. :) I was shocked to find...

Yes! That was the site. :) I was shocked to find that I didn't bookmark the page, and couldn't find it anymore. :)
Forum: Graphics 15 January 2020, 20:58
Replies: 3
Views: 145
Posted By sparhawk
Image conversion from RGB to indexed color

I found some website where one could upload some RGB Image and it converted it to an indexed color image for download. You could choose from 2, 4, 8, ... also 12 bit RGB with 32 colors, etc. as on...
Forum: Coders. General 15 January 2020, 09:56
Replies: 84
Views: 7,762
Posted By sparhawk
I have created a project which uses bebbos...

I have created a project which uses bebbos compiler suite and VASM with CMake. It also provides a library (which you can ignore if you don't need it) with utillity functions.
The goal was to make...
Forum: Coders. Asm / Hardware 14 January 2020, 22:05
Replies: 21
Views: 828
Posted By sparhawk
AFAIK it restarts with the VBI.

AFAIK it restarts with the VBI.
Forum: Nostalgia & memories 14 January 2020, 15:54
Replies: 53
Views: 2,593
Posted By sparhawk
This thread is really interesting to read. When I...

This thread is really interesting to read. When I started reading on Sprites on Amiga, I thought, that they are so clumsy and ineffective that I wonder why one would use them at all, especially when...
Forum: Coders. Asm / Hardware 14 January 2020, 10:05
Replies: 21
Views: 828
Posted By sparhawk
I know what it does, but it was not clear to me,...

I know what it does, but it was not clear to me, under which circumstances this condition occurres.
Forum: Coders. Asm / Hardware 13 January 2020, 22:02
Replies: 21
Views: 828
Posted By sparhawk
Now the piucture becomes clearer. :) I was not...

Now the piucture becomes clearer. :) I was not aware when I started to with the copper, that the copper can wait for the blitter to finish which is probably the only condition that can cause the SKIP...
Forum: Coders. Asm / Hardware 13 January 2020, 18:50
Replies: 21
Views: 828
Posted By sparhawk
Copper SKIP instruction

While the copper instructions are easy to understand in itslef, it's really cool what kind of stuff you can do with it. However, I was wondering what an actual use case would be where the SKIP...
Forum: Coders. General 13 January 2020, 16:39
Replies: 84
Views: 7,762
Posted By sparhawk
Looks really cool! Just like the arcade. :D ...

Looks really cool! Just like the arcade. :D

I like the idea of using the raster bars for getting some information about the framerate, because I want to do some game myself, and was wondering how...
Forum: Coders. Asm / Hardware 13 January 2020, 15:02
Replies: 9
Views: 252
Posted By sparhawk
Yes. of course. You can have an address register...

Yes. of course. You can have an address register with an odd value. You just can't use this address to access word or longs.


so this is fine:


move.l #1,a0
.loop:
move.b (a0)+,d0
...
Forum: Coders. C/C++ 13 January 2020, 14:57
Replies: 6
Views: 345
Posted By sparhawk
If you plan to call C functions from your asm...

If you plan to call C functions from your asm code, you may still need to write a regular "main()" module as your entrypoint and call your asm from there, as the compiler startup does some additional...
Forum: Coders. Asm / Hardware 13 January 2020, 14:35
Replies: 9
Views: 252
Posted By sparhawk
The problem is this line! ADD.W #15,A3 ...

The problem is this line!

ADD.W #15,A3


On 68000 (10/20 as well?) the data needs to be on an even address for word or longword access, so this will cause a guru. On higher CPUs this will work,...
Forum: Coders. Language 11 January 2020, 19:36
Replies: 3
Views: 193
Posted By sparhawk
Thanks! When I use that REG() notation, do I...

Thanks! When I use that REG() notation, do I still need to preserve the register, or does the compiler know in this case that it can get scratched?
It's still faster if I don't have to translate the...
Forum: Coders. Language 11 January 2020, 19:05
Replies: 3
Views: 193
Posted By sparhawk
Calling convention for gcc (m68k-amigaos)

When I call an assembler function, d0/d1 and a0/a1 don't need to be saved?


The first four params are passed in d0/d1 and a0/a1, or does this depend on wether it's a pointer or value?


Is...
Forum: Coders. Asm / Hardware 11 January 2020, 17:11
Replies: 4
Views: 364
Posted By sparhawk
I haven't looked into it yet, but I think WinuAE...

I haven't looked into it yet, but I think WinuAE is a great thing, and with a userfriendly debugger it's even more powerfull. I know that the GUI debugger can not load processes as it doesn't know...
Forum: Coders. Asm / Hardware 11 January 2020, 01:37
Replies: 4
Views: 364
Posted By sparhawk
GUI Debugger wishlist

Since I'm using the GUI debugger rather frequently I would like to improve it a little bit when I have time and in the mood for it. Mostly I want to focus on Amiga programming, but since I find this...
Forum: support.WinUAE 11 January 2020, 01:27
Replies: 4
Views: 315
Posted By sparhawk
PR is now merged on WinUAE github. So either...

PR is now merged on WinUAE github. So either build from git, or wait for next release, which includes that.
Forum: Coders. Asm / Hardware 10 January 2020, 14:27
Replies: 35
Views: 908
Posted By sparhawk
Wasn't the idea of RTG to allow graphiccard...

Wasn't the idea of RTG to allow graphiccard replacements, just like on the PC? In that case it would make sense, as new cards may have different requirements, and thus should be used through a stable...
Forum: Coders. Asm / Hardware 07 January 2020, 14:57
Replies: 33
Views: 1,078
Posted By sparhawk
LOL! So I'm not the only one who coded on the...

LOL! So I'm not the only one who coded on the 6502/10 with a monitor? :D Never used an assembler back then, as I didn't even know it existed.
Forum: support.WinUAE 06 January 2020, 20:55
Replies: 4
Views: 315
Posted By sparhawk
I submitted a PR to Tony to fix this, but I'm...

I submitted a PR to Tony to fix this, but I'm still waiting that he merges it.
Forum: Coders. Asm / Hardware 06 January 2020, 19:19
Replies: 8
Views: 329
Posted By sparhawk
Yes. I was using -spaces before, but that causes...

Yes. I was using -spaces before, but that causes other problems (don't remember right now what this was), so I'musing this now. I have to get used to this. Caused a lot of "bugs" because I almost...
Forum: Coders. Asm / Hardware 06 January 2020, 15:54
Replies: 8
Views: 329
Posted By sparhawk
What is considered a constant expression? I...

What is considered a constant expression?

I have this code

CopperList:
dc.w $0180,$000
dc.w $3c01,$ff00
dc.w $0180,$0fff
dc.w $ffe1,$fffe
dc.w $0000,$ff00
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