Search found 1234 matches

by Zamuel_a
Fri Nov 16, 2018 1:41 pm
Forum: 680x0
Topic: efficient polygon drawing
Replies: 24
Views: 5275

Re: efficient polygon drawing

I draw the lines with xor instead of or so end pixels that overlap will be black. That doesnt solve all problems and I guess polygons will have holes in the corners since the pixels arent drawn. Since I draw the lines one pixel in x each time I dont have to take special care if dy>dx. But end pixels...
by Zamuel_a
Tue Nov 13, 2018 11:43 pm
Forum: 680x0
Topic: efficient polygon drawing
Replies: 24
Views: 5275

Re: efficient polygon drawing

I made a quick XOR draw test on my PC and it almost works. I draw a polygon with lines and XOR each line with the previous one after that. That actually filled the triangle, but at the edges it draws a vertical line to the bottom of the screen. Since the edges of a triangle is just one pixel. I trie...
by Zamuel_a
Tue Nov 13, 2018 11:15 pm
Forum: 680x0
Topic: efficient polygon drawing
Replies: 24
Views: 5275

Re: efficient polygon drawing

I made a quick XOR draw test on my PC and it almost works. I draw a triangle with lines and XOR each line with the previous one after that. That actually filled the triangle, but at the edges it draws a vertical line to the bottom of the screen. Since the edges of a triangle is just one pixel. I tri...
by Zamuel_a
Fri Nov 09, 2018 12:52 pm
Forum: 680x0
Topic: efficient polygon drawing
Replies: 24
Views: 5275

Re: efficient polygon drawing

Okay, so you make an XOR with the previous (or next?) drawn line on the screen. I can see that it might work for some occasions, but not all of them. If the drawn outline is filled in the pixel above and the current pixel is also filled, when the new pixel will be zero so it can't work. I guess I mi...
by Zamuel_a
Thu Nov 08, 2018 7:47 am
Forum: 680x0
Topic: efficient polygon drawing
Replies: 24
Views: 5275

Re: efficient polygon drawing

you copy a full bitplane on itself in xor mode with blitter with destadr = sourceadr + line size (160 bytes for instance). what it does is to make the horizontal borders of the outline working as a toggle fill / do not fill But that would just invert the drawn outlines?. Not fill it. If I have a bl...
by Zamuel_a
Wed Nov 07, 2018 4:16 pm
Forum: 680x0
Topic: efficient polygon drawing
Replies: 24
Views: 5275

Re: efficient polygon drawing

How is the XOR filler done? Sounds interessting to try it out with the blitter? But I can't see how it can automatically draw a line? It seems like all that will happen is that black pixels turn white (0 to 1) and the opposite. Nothing else.
by Zamuel_a
Wed Oct 24, 2018 8:45 am
Forum: Professionals
Topic: How to install MiNT?
Replies: 32
Views: 1415

Re: How to install MiNT?

I tried it under Hatari (maybe I need a real Falcon for it to work?) I set it up to be 16Mhz 68030 with 14Mb RAM. Put VanillaMint on a HD floppy image and used an empty folder as HD. I started the install program on the floppy image and it installed it on the harddrive without any problems from what...
by Zamuel_a
Tue Oct 23, 2018 9:08 pm
Forum: Professionals
Topic: How to install MiNT?
Replies: 32
Views: 1415

Re: How to install MiNT?

I downloaded VanillaMinT and followed the instructions. It starts and I get to the command prompt with the "mint:/#" cursor. What do I do now? Whatever I type I just get some code error code -34
by Zamuel_a
Tue Oct 23, 2018 8:59 pm
Forum: Professionals
Topic: How to install MiNT?
Replies: 32
Views: 1415

Re: How to install MiNT?

I don't care if it's easy or hard to install it. I understand that it might not be to easy. It's just that when I read the info next to the download files it says stuff like "all you need, no installation, just click and start and so on..." That isn't really the truth so a bit annoying. :w...
by Zamuel_a
Tue Oct 23, 2018 5:09 pm
Forum: Professionals
Topic: How to install MiNT?
Replies: 32
Views: 1415

Re: How to install MiNT?

I couldn't find anything called "68000" but tried some others. I found one freemint version and when it booted it complained about missing stuff and just got a "system halted" message. There are no installation files. Just AUTO and some other folders. Can't understand why it has ...
by Zamuel_a
Mon Oct 22, 2018 7:56 pm
Forum: Professionals
Topic: How to install MiNT?
Replies: 32
Views: 1415

How to install MiNT?

I wanted to test MiNT but can't get it to work. I visited https://github.com/freemint/freemint/releases and downloaded 1.18.0 I understood that I had to remove all programs in the autofolder except the one I wanted to use. (The 030 version in this case since I run it on a standard Falcon). It booted...
by Zamuel_a
Wed Mar 21, 2018 2:39 pm
Forum: Coding
Topic: why use ASM anymore
Replies: 76
Views: 11826

Re: why use ASM anymore

I have programmed many languages and on PC it's mostly C or C++, C# and so on... But on older computers like the Atari I prefer the 68000 assembler. It's not much different than program in C. C: A = A + 1 ASM ADD #1,D0 C: A = B[10] ASM MOVE 10(a0),d0 It's more or less the same syntax so it's not dif...
by Zamuel_a
Tue Mar 20, 2018 4:19 pm
Forum: Coding
Topic: why use ASM anymore
Replies: 76
Views: 11826

Re: why use ASM anymore

I think programming in 68000 assembly is more or less easier or the same difficulty as program in C. The commands are complex and it's so much easier to keep track of memory and time critical things than doing it in C. On a modern computer it's different ofcourse,
by Zamuel_a
Fri Jan 26, 2018 9:46 am
Forum: Coding
Topic: STE horizontal hardware scroll
Replies: 28
Views: 6817

Re: STE horizontal hardware scroll

What I did in my Giana sisters STE conversion is that when I enter a new level I setup several screens with all the graphics so that the scroll routine only has to do that and not fill in any new data. I tried that at first, but it takes a lot of processor power to redraw the new 16 pixels that will...
by Zamuel_a
Thu Nov 30, 2017 8:32 am
Forum: Support
Topic: Steem 3.9.3 problem
Replies: 45
Views: 7545

Re: Steem 3.9.3 problem

When I run 3.9.3 on my laptop and wakes it up after hybernation I get error: BLIT ERROR and I must restart Steem.
by Zamuel_a
Sun Nov 26, 2017 8:19 am
Forum: Games - General
Topic: Pacmania STE - New Version
Replies: 118
Views: 60899

Re: Pacmania STE - New Version

It should work on a US machine but it must run in 50hz.
by Zamuel_a
Sat Jun 03, 2017 9:31 am
Forum: Games - General
Topic: "Metroid"
Replies: 187
Views: 38551

Re: "Metroid"

Is that still in the works?


Well I'm working on it from time to time. It's not going fast but hopefully something will come out eventually ;)
by Zamuel_a
Thu Feb 09, 2017 11:19 am
Forum: Development
Topic: Steem SSE 3.9 bug reports
Replies: 39
Views: 10858

Re: Steem SSE 3.9 bug reports

I have been using version 3.7.2 for a while without any problems. When I checked I saw that there were newer versions out so I tried the 3.9.0 but found a lot of bugs. I haven't checked with the versions between 3.7.2 - 3.9.0 so can't say were the errors first shows up. some things I found was that:...
by Zamuel_a
Mon Jan 30, 2017 2:05 pm
Forum: Games - General
Topic: Enhance ST games for the Falcon ?
Replies: 30
Views: 11042

Re: Enhance ST games for the Falcon ?

but what bout Atari 8bit games enhanced for the ST?


That would be very difficult since it's a different processor. You would need to rewrite the entire game so it would not be an enhanced version but instead a new game.
by Zamuel_a
Mon Dec 12, 2016 11:05 pm
Forum: Games - General
Topic: Wolfenstein 3D?
Replies: 11
Views: 4556

Re: Wolfenstein 3D?

Does anyone know why it never got finished? What happened to the guy who created it? It seems to be so close to be a final fully working version so had been great if it was finished someday.
by Zamuel_a
Sat Oct 29, 2016 5:48 pm
Forum: Games - General
Topic: What Gamepads or Controllers to Use ?
Replies: 9
Views: 4742

Re: What Gamepads or Controllers to Use ?

Megadrive/Genesis gamepad won't work on a ST cause the extra signals locks up the keyboard, believe me I've tried. Will work if plugged in the mouse port though... strange. I have used it in games. I don't think there are any extra signals from the joystick port that can lock up anything. Only the ...
by Zamuel_a
Thu Oct 20, 2016 8:46 pm
Forum: Games - General
Topic: What Gamepads or Controllers to Use ?
Replies: 9
Views: 4742

Re: What Gamepads or Controllers to Use ?

You can use any SEGA Megadrive or Master system controller if you want to use a game pad.
by Zamuel_a
Sun Oct 16, 2016 7:46 pm
Forum: Games - General
Topic: New ST project - Pole Position arcade conversion
Replies: 210
Views: 68240

Re: New ST project - Pole Position arcade conversion

I see that the sky gradient "jump" one pixel. I guess you create it with a Timer B interrupt that sometimes trigger on the wrong line. One way to get around that problem is to trigger the interrupt one line before and when it trigger, check if you are on that line or on the next one becaus...
by Zamuel_a
Sun Oct 09, 2016 10:16 am
Forum: Coding
Topic: C2P speed on plain ST for flat polygons
Replies: 3
Views: 2510

Re: C2P speed on plain ST for flat polygons

If you want to do regular flat shaded polygons, then C2P is not necessary. You can do that rather fast in the normal bitplane mode. C2P is rather costly and it's only with texture mapping you might want to use it.
by Zamuel_a
Wed Sep 21, 2016 12:42 pm
Forum: Games - General
Topic: Pacmania STE - New Version
Replies: 118
Views: 60899

Re: Pacmania STE - New Version

In some occasions one frame can take longer than one VBI so I guess this is what cause the problem. It shouldn't happen so often and I can't really fix it either since the game take 100% CPU if all sprites are on screen at once.

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