Search found 463 matches

by ob1
Tue Jan 16, 2007 3:50 pm
Forum: Megadrive/Genesis
Topic: Detecting the bios
Replies: 15
Views: 12579

I think it doesn't help, but the licence thing is only on Genesis 2, isn't it ?
by ob1
Tue Jan 16, 2007 10:50 am
Forum: Tools
Topic: [GensKMod] version 0.6 is out
Replies: 22
Views: 19684

Haven't downloaded it yet.
Is the VRAM dump byte-swapped ?
by ob1
Tue Jan 16, 2007 10:49 am
Forum: Tools
Topic: .NET for my next tool ?
Replies: 6
Views: 7414

+1 for Pascal But let us not forget why we're (partially) here for : to learn. I'm in for fun with Genesis, but it was also to learn 68k programming. So if you want to learn .NET, and by the way, enhance KMod, it's your will, it's your life. Noone could (should) prevent you to do this. Do what you w...
by ob1
Tue Jan 09, 2007 9:15 am
Forum: Megadrive/Genesis
Topic: Coding language
Replies: 33
Views: 23859

Stef wrote:generated code is efficient, not the best code but very good at least :)
+1
although I'm an ASM-only guy !!!
by ob1
Tue Jan 09, 2007 9:01 am
Forum: Collaboration
Topic: Megadrive multipart demo
Replies: 27
Views: 33494

Re: Megadrive multipart demo

This rom header can reroot hint and vint using vectors in ram to each demo. Just figured out this too. The header would be dc.l $00FFFFFC,$200 dc.l INT,INT,INT,INT,INT,INT,INT dc.l INT,INT,INT,INT,INT,INT,INT,INT dc.l INT,INT,INT,INT,INT,INT,INT,INT dc.l INT,INT,INT,HBL,INT,$FF0000,INT,INT dc.l INT...
by ob1
Tue Jan 09, 2007 8:45 am
Forum: Collaboration
Topic: Megadrive multipart demo
Replies: 27
Views: 33494

Great !!! I've just figured it. Here it is, my way : GFX_CTRL equ $C00004 main: * main code goes here waitVInt: move.w GFX_CTRL,d0 andi.w #$0008,d0 bne waitVInt * code during V blank waitVIntFinish: move.w GFX_CTRL,d0 andi.w #$0008,d0 beq waitVIntFinish bra main or, for the Cish people : int main() ...
by ob1
Mon Jan 08, 2007 10:28 pm
Forum: Collaboration
Topic: Megadrive multipart demo
Replies: 27
Views: 33494

I'd like to submit something but don't know yet if I'd be brave enough. For now, don't count me in.

Do we have a deadline yet ?
by ob1
Fri Jan 05, 2007 9:21 am
Forum: Megadrive/Genesis
Topic: Coding language
Replies: 33
Views: 23859

Coding language

I know for some of you (TmEE, Kaneda, Stef, Fonz, ...) , but precisely ...
by ob1
Wed Jan 03, 2007 4:28 pm
Forum: Video Display Processor
Topic: 512 colors demo
Replies: 21
Views: 18880

Stef wrote:ob1 forgot to remove the ending point and the URL became wrong.
Thanks Stef' for pointing it out.
It's corrected now.
by ob1
Tue Jan 02, 2007 8:07 pm
Forum: Video Display Processor
Topic: 512 colors demo
Replies: 21
Views: 18880

Try this way : - prepare your DMA transfert (writing DMA reg values) - wait for the HBlank (Hblank flag = 1) - do the DMA Wht a clever way ! I'll try it. Anyway 16 colors during a single scanline seems to be a bit optimist, try to lower to 8 colors only. Ouch !!! It's going to be quite hard, so !!!
by ob1
Tue Jan 02, 2007 7:40 am
Forum: Video Display Processor
Topic: 512 colors demo
Replies: 21
Views: 18880

I've put the demo on my site : http://perso.wanadoo.fr/olivier.brosseron.
by ob1
Tue Jan 02, 2007 7:33 am
Forum: Megadrive/Genesis
Topic: Genny and 3D
Replies: 138
Views: 99251

<OFF TOPIC> OK you guy. So, we agree : we're 2007, Jan the 2nd, half past eight in the morning, and we're talking about Genny, aren't we ? Guess that's what we mean by "geek". Happy new year !!! </OFF TOPIC> I'd say the 68k isn't penalized by memory access since its CISC root makes possible for him ...
by ob1
Sat Dec 30, 2006 8:59 pm
Forum: Video Display Processor
Topic: DMA copy to CRAM
Replies: 1
Views: 3443

DMA copy to CRAM

Has anyone already tried (and succeded) to DMA copy from VRAM (obviously) to CRAM ? Would it be faster than a DMA transfer from ROM or Work RAM (obviously no) ? Nevertheless, with DMA copy, the CPU can keep on working whereas with DMA transfer, it is stalled. I guess that for transferring data to CR...
by ob1
Fri Dec 29, 2006 12:36 pm
Forum: Video Display Processor
Topic: 512 colors demo
Replies: 21
Views: 18880

I may have put too much on optimisation. DMA transfer size being constant, I get it out of HBL. Maybe it was deleted, or something .... I don't know what was wrong. I haven't exactly pointed the bug. Sorry. Maybe I'll rework on it after my holidays. For now, I'm currently working on a SEGA Saturn SC...
by ob1
Thu Dec 28, 2006 2:42 pm
Forum: Video Display Processor
Topic: 512 colors demo
Replies: 21
Views: 18880

Ok I got it working. It displays ... 256 colors.
Not so bad.
I'm beginning to feel bored.
Guess it's time for a change ...