Search found 1483 matches

by Nyh
Thu Mar 02, 2017 3:53 pm
Forum: C / PASCAL etc.
Topic: Pure C floating point problems
Replies: 0
Views: 755

Pure C floating point problems

Working on some interesting C code and using Pure C as my primary C compiler (I just love Pure debugger for debugging my programs, yes, sometimes there are bugs in my C code), I found some bugs in the Pure C library. 1 the function ldexp(x, p) doesn't work as expected when x == 0.0. The expected res...
by Nyh
Fri Sep 18, 2015 8:43 am
Forum: Coding
Topic: Decoding Prism Paint image files
Replies: 10
Views: 6379

Re: Decoding Prism Paint image files

It might be. I thought I had released the current version. But anyway here is the full source and the compiled program.

Hans Wessels
by Nyh
Tue Sep 15, 2015 9:27 am
Forum: Coding
Topic: Decoding Prism Paint image files
Replies: 10
Views: 6379

Re: Decoding Prism Paint image files

Here is the C-source I use for decoding prism paint files.

Hans
by Nyh
Sat Sep 12, 2015 9:56 pm
Forum: Other BASIC
Topic: <Omikron.Basic> Game of Life Simulation
Replies: 3
Views: 4033

Re: <Omikron.Basic> Game of Life Simulation

Nice. I love the game of life. I made a pretty fast life engine. Dr Zweistein created an editor for it. File included.

Hans
by Nyh
Sat Apr 18, 2015 12:54 pm
Forum: The Digital Department
Topic: Looking for sample discs
Replies: 12
Views: 5275

Re: Looking for sample discs

-- Gebruikte afkortingen: -- TOS: Tukkers On ST -- TEX: The Exceptions -- TLB: The Lost Boys -- TCB: The Care Bears -- TBC: The Black Cats -- DDC: Double Dutch Crew -- OVR: The Overlanders -- MCA: Menacing Cracking Aliance -- ULM: UnLimited Matricks --------------------------------------------------...
by Nyh
Sat Apr 18, 2015 9:47 am
Forum: The Digital Department
Topic: Looking for sample discs
Replies: 12
Views: 5275

Re: Looking for sample discs

Yes, I still have them. Don't know if I can still read them.

Hans
by Nyh
Sat Apr 18, 2015 9:24 am
Forum: Applications
Topic: Looking for Atari Genealogy Software
Replies: 6
Views: 4662

Re: Looking for Atari Genealogy Software

I have found this list: All Known Genealogy Programs for Non-DOS/Mac Machines As of 1 January 1996 by George W. Archer Contributing Editor, National Genealogical Society Computer Interest Group "Digest" OTHER SYSTEMS Adam 2.7 (Atari) (German) AFT 1.2 (Amiga) + A-Gene V4.49 (Amiga) + (Austr...
by Nyh
Sat Apr 18, 2015 9:13 am
Forum: Chat forum [ENG]
Topic: Looking for motorola inside picture
Replies: 8
Views: 4627

Re: Looking for motorola inside picture

The three version I have for Atari included in this ZIP file.

Hans
by Nyh
Fri Mar 27, 2015 9:52 am
Forum: Coding
Topic: Req : SOKOBAN Source (Delta Force)
Replies: 4
Views: 3112

Re: Req : SOKOBAN Source (Delta Force)

The file says this is the source. I didn't check.

Hans
by Nyh
Fri Nov 28, 2014 10:29 am
Forum: Demos - Requests
Topic: Games in Demos
Replies: 21
Views: 8281

Re: Games in Demos

Two games in Syntax terror: Sokoban and Match it

TNT-crew Fnill shooting game

Hans Wessels
by Nyh
Thu Aug 21, 2014 1:54 pm
Forum: News & Announcements
Topic: New idea about a demo idea
Replies: 74
Views: 21430

Re: New idea about a demo idea

mikro wrote:
Nyh wrote:No, the releases here on AF is all there is at the moment.

Any chance for a release in near future? ;)

Chances are low. Too many unfinished projects on my harddisk. Only a limited amount of time.

Hans Wessels
by Nyh
Tue Aug 19, 2014 12:27 pm
Forum: 680x0
Topic: ARJBeta decompression issue
Replies: 4
Views: 2456

Re: ARJBeta decompression issue

actually, I have no problems with usage of ARJBETA and UNARJ_PR. They compress/decompress fine. My issue is that I'm not able to depack data (packed "ARJBETA a -m4 -jm IMAGE.PI1 testm4.arj") with "ARJ mode4 decode function" from file mode_4.s from arjbeta.zip I see in the source...
by Nyh
Tue Aug 19, 2014 9:14 am
Forum: 680x0
Topic: ARJBeta decompression issue
Replies: 4
Views: 2456

Re: ARJBeta decompression issue

I use packer and depacker from arjbeta.zip file. in ARJ4.zip you can find my binary and sourcecode files with needed source image file IMAGE.PI1 Any ideas? thx Yes, the ARJBETA compression suite has a BIG usability problem. Although it is a very great packer it is also very hard to use. ARJBETA is ...
by Nyh
Mon Aug 18, 2014 10:40 am
Forum: News & Announcements
Topic: New idea about a demo idea
Replies: 74
Views: 21430

Re: New idea about a demo idea

No, the releases here on AF is all there is at the moment.

Hans Wessels
by Nyh
Mon Aug 18, 2014 10:38 am
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 19
Views: 5488

Re: LZ4 decoder (assembler)

Did you test the decoder? As in decompressed file is the dame as the compressed file? When I read the LZ4 documentation I think it is a little endian based format. The MC68000 of the Atari is an big endian processor. I do not see any of the byte shuffling needed to convert from little to big endian....
by Nyh
Tue Jun 10, 2014 7:58 am
Forum: Hardware
Topic: Reading input from Joystick/mouse port 0
Replies: 4
Views: 1248

Re: Reading input from Joystick/mouse port 0

You have to say to the keyboard that a joystick is attached instead of a mouse. This can be done by sending a Disable mouse command to the keyboard: (IKBD $12) to the keyboard processor.

Hans Wessels
by Nyh
Fri Jun 06, 2014 9:57 am
Forum: 680x0
Topic: Keyboard jitter solved!
Replies: 37
Views: 10248

Re: Keyboard jitter solved!

You would expect the opposite: best case when in sync. No, when you consider something happens on rising clock edges the in sync is the worst case because you have to wait a whole cycle for the next rising edge. Also the MC68000 doc states: Enable (E) This signal is the standard enable signal commo...
by Nyh
Sat May 31, 2014 10:55 pm
Forum: Coding
Topic: ray's lz77 and lz78 packer
Replies: 12
Views: 5357

Re: ray's lz77 and lz78 packer

That would be the SNDH files from the Relix music demo; if you download the archive here: http://sndh.atari.org/download.php and then dig out the files in 505/Relix. They are ICE-packed though. Thank you. You copied the files (106 files to be exact), uncompressed them from ICE and repacked them wit...
by Nyh
Fri May 30, 2014 7:39 am
Forum: Coding
Topic: ray's lz77 and lz78 packer
Replies: 12
Views: 5357

Re: ray's lz77 and lz78 packer

I had heard so much good about ARJBETA so I thought it would win. But no, in fact ATOMIK took the grand prize and it saved me some memory (the compression was to save ram, not disk). If I added the 19k (? I forgot the exact requirement) for ARJBETA stackspace the ATOMIK won even clearer. I am very ...
by Nyh
Thu May 29, 2014 7:52 am
Forum: Coding
Topic: ray's lz77 and lz78 packer
Replies: 12
Views: 5357

Re: ray's lz77 and lz78 packer

Normally LZ77 should have a better compression ratio as LZ78, especially on lager files. If you need a good compression ratio forget about this packer and use ARJBETA. The packer and depack sources can be found in this thread: http://www.atari-forum.com/viewtopic.php?f=28&t=10347&start=25 Ha...
by Nyh
Sun May 25, 2014 9:08 pm
Forum: Development
Topic: New disk image format STW
Replies: 50
Views: 13531

Re: New disk image format STW

I understand what you're doing but if I would vote for a new format it would be HFE. I consider the HxC SD Floppy Emu to be the first and foremost thing for anyone interested in retro to get when using real hardware - and not having to convert images back'n'forth when moving between emulator and ha...
by Nyh
Sun May 25, 2014 8:12 am
Forum: 680x0
Topic: The best way to do sprite collision detection
Replies: 22
Views: 5952

Re: The best way to do sprite collision detection

Remember the first ADD or SUB should be a normal ADD or SUB because you don't want to use the x-bit the first time. It it possible to precalc the sums? If you first draw an empty sprite (all zero bits) the sum is known and should be 0. At the last stage you can OR in the sprite because the masking i...
by Nyh
Fri May 23, 2014 9:18 am
Forum: 680x0
Topic: The best way to do sprite collision detection
Replies: 22
Views: 5952

Re: The best way to do sprite collision detection

So if you're using a palette and your sprite's first four bytes are FF, F0, F0, FA, and the same four bytes appear in the screen buffer, the result of adding the value of each byte from the sprite data, and subtracting the value of each byte from the screen data should be zero: Set D0 to zero Add F...
by Nyh
Thu May 22, 2014 7:39 pm
Forum: 680x0
Topic: The best way to do sprite collision detection
Replies: 22
Views: 5952

Re: The best way to do sprite collision detection

First take a step back. You start with bullets and try to detect collision with sprites. Is the other way around faster? Start with sprites and try to detect a collision with a bullet. Which method is fastest cannot be said beforehand. Note: * a0=pointer to sprite data * a1=pointer to sprite on scre...
by Nyh
Wed May 14, 2014 8:33 am
Forum: Pasti & VAPI
Topic: Kyroflux used for Andy Warhol digital artwork preservation
Replies: 5
Views: 3497

Re: Kyroflux used for Andy Warhol digital artwork preservati

This is quite painful to watch https://vimeo.com/92583299 It is. Should I really believe the so called Amiga experts do not recognize an IFF file? Is all the 'hacking' they did converting an IFF file with ImagaMagick? It would have been interesting when they fixed some bit rot and patched an IFF fi...

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