Page 1 of 2
Virtua Racing
Posted: Sun May 20, 2007 7:52 pm
by evildragon
I dumped the genesis version of VR if anyone wants to take a shot at it, since the SVP specs have been appearing lately..
http://blackevilweredragon.spymac.com/vr.rar
Posted: Sun May 20, 2007 8:49 pm
by Shiru
Genesis VR already dumped long ago and presented in goodset.
Posted: Sun May 20, 2007 10:09 pm
by evildragon
Shiru wrote:Genesis VR already dumped long ago and presented in goodset.
damn, i thought i was the first to do it and everyone else was lazy.. XD
my bad..
Posted: Sun May 20, 2007 11:26 pm
by TascoDLX
Posted: Sun May 20, 2007 11:43 pm
by evildragon
i noticed your guide says the 23Mhz clocked is derived by dividing the 68k clock by 3. wouldn't that be "multiplied"?
anyway, with these guides, someone got the Genesis 3 running VR...
Posted: Mon May 21, 2007 8:39 am
by TascoDLX
evildragon wrote:i noticed your guide says the 23Mhz clocked is derived by dividing the 68k clock by 3. wouldn't that be "multiplied"?
Yes, that would be "multiplied". I'm sure I just mixed it up.
evildragon wrote:anyway, with these guides, someone got the Genesis 3 running VR...
http://www.undergroundcm.com/forum/viewtopic.php?t=231
The 23MHz clock rate is merely a hypothesis but as I see now the SVP takes both the 7.6MHz 68k clock and the 13.22MHz dot clock. I would have assumed that the dot clock is used as a DRAM refresh but I believe VR uses pseudo-static RAM.
As far as I know, there have been no efforts to determine the instruction timings, etc.
Posted: Tue Feb 05, 2008 8:56 am
by Eke
The day has finally arrived, SVP is now emulated
http://www.eidolons-inn.net/tiki-view_f ... &forumId=5
Nice job TascoDLX and Notaz !
Posted: Tue Feb 05, 2008 8:59 am
by TmEE co.(TM)
WOWOWOWOW !!!
Now this needs to be put into Gens and Fusion !!!
Posted: Tue Feb 05, 2008 10:31 am
by Jorge Nuno
Great hard work in there
Posted: Tue Feb 05, 2008 10:50 pm
by Chilly Willy
Very cool... I use PicoDrive for the PSP as my main method of playing Genesis/SegaCD games these days, so this will be very welcome.
Posted: Fri Feb 08, 2008 12:48 pm
by evildragon
Heh, you wouldn't have by any chance used my ROM? :p
(I just want to know if my ROM works, as I can't test it because I have a PowerPC Mac)
Posted: Fri Feb 08, 2008 10:39 pm
by Chilly Willy
Well, I normally run Ubuntu on my system, but fortunately, PicoDrive works perfectly with WINE. I tried your rom, and it works great in PicoDrive. I can't wait until he updates the PSP version to 1.40!
Running Virtua Racing on the PSP should be really cool.
Posted: Fri Feb 08, 2008 11:54 pm
by evildragon
I can't run WINE sadly.
Glad my ROM works..
Posted: Sat Feb 09, 2008 6:09 am
by Chilly Willy
evildragon wrote:I can't run WINE sadly.
Glad my ROM works..
Yes, it's too bad Apple switched to the x86 before DarWINE had a chance to get going... unless you're on an x86 Mac. If so, you might try the current x86 DarWINE builds.
In the emulator, VR runs FAST... I forget how fast the actual cart was on a real Genesis. I normally use the 32X cart... I'll have to dig through my boxes looking for the Genesis cart to check how it compares to the emulation.
Posted: Sat Feb 09, 2008 6:29 am
by Eke
In the emulator, VR runs FAST... I forget how fast the actual cart was on a real Genesis. I normally use the 32X cart... I'll have to dig through my boxes looking for the Genesis cart to check how it compares to the emulation.
I'm interested if you could capture video of the real cart running on Genesis
Indeed, I implemented the SVP core in my emulator but the Gamecube CPU lacks some power to run everything at full speed (average 45 fps with some downfalls to 25 fps
)...
If I want full framerate, I have to underclock the SVP but then the "3D" rendering is slower (according to Notaz, correct value is approximately 1000 cycles per line, but it's is maybe overclocked a little bit)
Having the real thing to compare and adjust cycles value would be nice
or maybe it's time for me to learn PowerPC ASM