Search found 2985 matches

by Chilly Willy
Fri May 02, 2008 7:56 am
Forum: Sound
Topic: how can i do music on megadrive?
Replies: 288
Views: 551954

Why is there a need for such thing ? Additional timing ? Oh - just for frequency scaling. One way is to use two bytes. The low byte acts as the float part and the upper byte is the whole part. Just add the whole part/byte to the wave/sample pointer. That way you don't have to store multiple samples...
by Chilly Willy
Thu May 01, 2008 9:04 pm
Forum: Megadrive/Genesis
Topic: Question topic
Replies: 17
Views: 14855

I saw normal cartridges failing to run on the 32x (one Sonic 3D cart from a friend doesn't run on the 32x with good video while without it it's all OK, while normally Sonic 3D doesn't get affected). Simply you can't expect a non-32x game running with the 32x attached. Same goes with the Sega CD, do...
by Chilly Willy
Thu Apr 17, 2008 10:45 pm
Forum: Megadrive/Genesis
Topic: Mega Drive Research and Development Center
Replies: 27
Views: 23109

I checked and ASMX is MRI compatible, so don't worry. However it's missing DCB and macro parameters don't seem to work properly :/ (what, it only accepts one parameter per macro?). Hence Ninja Fight didn't assemble with it. Well, it IS open source. When a problem is found, it can be looked into. Wi...
by Chilly Willy
Thu Apr 17, 2008 6:47 am
Forum: Megadrive/Genesis
Topic: Mega Drive Research and Development Center
Replies: 27
Views: 23109

So there was Basiegaxorz. I forgotten where the page was :P Now I can make examples for it too... through a lot of the examples in the page are already built-in instructions. I guess that most of the Basiegaxorz examples (at first at least) will have to do with handling the FM channels, ability it ...
by Chilly Willy
Wed Apr 16, 2008 7:07 am
Forum: Megadrive/Genesis
Topic: Mega Drive Research and Development Center
Replies: 27
Views: 23109

Not a bad start. I would add these to the tools: 68K BASIC: BasiEgaXorz - http://devster.monkeeh.com/sega/basiegaxorz/ 68K and Z80 assembly: asmx - http://xi6.com/projects/asmx/ 68K C/C++: uclinux gcc 4.1.1 - http://www.uclinux.org/pub/uClinux/m68k-elf-tools/tools-20061214/ SH2 C/C++: KPIT GNU Tools...
by Chilly Willy
Wed Apr 02, 2008 5:47 am
Forum: Regen
Topic: Old Regen pages
Replies: 547
Views: 766275

That's fine. No rush. We'll be here when it's ready. :D
by Chilly Willy
Tue Apr 01, 2008 6:03 pm
Forum: Regen
Topic: Old Regen pages
Replies: 547
Views: 766275

How about an update for us linux folks? :D
by Chilly Willy
Mon Mar 24, 2008 6:20 pm
Forum: Megadrive/Genesis
Topic: Learning ASM
Replies: 13
Views: 12679

You use an assembler for assembly language. There's the old SNASM assembler that many folks use. I think more folks here are using asmx. http://xi6.com/projects/asmx/ You can use any editor you're comfortable with to write the assembly files. As for example code, you'll have to look around. The demo...
by Chilly Willy
Mon Mar 24, 2008 5:56 am
Forum: Megadrive/Genesis
Topic: Learning ASM
Replies: 13
Views: 12679

That Sega2F doc... it has a bunch of things mis-aligned (like values in tables), and has a lot of missing pages, the PDF version is better (but heavier in file size) and it's here on the forum somewhere... EDIT: there it is...: http://www.spritesmind.net/_GenDev//forum/viewtopic.php?t=227 This is t...
by Chilly Willy
Sun Mar 23, 2008 11:21 pm
Forum: Megadrive/Genesis
Topic: Learning ASM
Replies: 13
Views: 12679

Some things to read... http://en.wikipedia.org/wiki/Motorola_68000 http://www.tigernt.com/onlineDoc/68000.pdf http://srf50194.ld.infoseek.co.jp/asm/mc68000.shtml http://www.math.unipd.it/~mezzetti/ROME68000/Manual/Tome0/toc.html Once you understand how the 68000 works, then you want to read about th...
by Chilly Willy
Fri Mar 21, 2008 1:54 am
Forum: Tools
Topic: Tomsoft Sega Kit released
Replies: 9
Views: 15240

TmEE co.(TM) wrote:if anyone has managed to DL, would that one be kind enough to host it somewhere as the traffic on that site seems to be insane...
Downloaded, verified, and uploaded to RabidSwear.

http://rapidshare.com/files/101118000/SegaKit.zip.html
by Chilly Willy
Wed Mar 19, 2008 6:10 pm
Forum: Sound
Topic: 68000 ram access from z80 ?
Replies: 41
Views: 36792

I always thought it was because 68000 bank access by Z80 was done through the IO chip (the only chip which got access to both complete data buses) it maybe affects the timing of banking access, bad data can be read if the read cycle is shortened And maybe it doesn't affect carts with faster roms. S...
by Chilly Willy
Mon Mar 17, 2008 6:43 pm
Forum: Sound
Topic: 68000 ram access from z80 ?
Replies: 41
Views: 36792

Which is probably why newer Genesis games use the 68000 for audio instead of the Z80. :lol:
by Chilly Willy
Mon Mar 17, 2008 6:40 pm
Forum: Regen
Topic: Old Regen pages
Replies: 547
Views: 766275

Hi, For people using Linux, I have uploaded the Linux version. Tell me how it goes. stay safe, AamirM Holy crap! That's slow!! It runs Sonic 3 slower on my 2.4 GHz X2 than my PSP. :shock: Maybe something is wrong with the way the timing is handled. Really??? Runs fine on my pentium 1.6 Ghz. I'll ll...
by Chilly Willy
Mon Mar 17, 2008 5:23 am
Forum: Sound
Topic: 68000 ram access from z80 ?
Replies: 41
Views: 36792

I take it the DMA has priority to the 68000 bus over the Z80. You could try splitting the DMA into smaller pieces to give the Z80 a better chance at bus cycles. You want larger DMAs to minimize the overhead of setting up the DMAs, but too big and they hold everything off too much. You could experime...