Open GoogleCodeExporter opened 9 years ago
Also breaks Test Drive V-Rally.
Original comment by matbur...@gmail.com
on 5 Jan 2011 at 10:13
And Disney's Dinosaur too.
Original comment by Spino_eX...@yahoo.com
on 9 Jan 2011 at 5:26
Rainbow Cotton also has the same problem, all of these games used to work until
recently.
Original comment by matbur...@gmail.com
on 2 Feb 2011 at 7:38
[deleted comment]
I've investigated this further, on pausing the log window just before the '8
bit vram writes are not possible' message, this message is printed immediately
before:
Error in dc\mem\sh4_area0.cpp:WriteBios:374 -> Write to [Boot ROM] is not
possible, addr=2c,data=4018cbce,size=4
The example above is for Rainbow Cotton, which only has the above error after
the FMV before the first level (ie. the game loads, intro + title screen + FMV
before level 1 all work).
I've not been able to do a proper trace through of the code, but browsing it
suggests that the above WriteBios function is only called when the emulation
thread is in initialisation (dc.cpp, emu_thread_state = "EMU_INIT"). This seems
a bit odd to be in this state when the game emulation is well underway, but
then I don't understand how nulldc is working internally whereas others do :)
In related issue 278, Mr Psyman says:
"SPU DMA takes too long and such. Setting it too low will break some stuff, too
high will break other stuff. Now, if there was a better DMA implementation and
timing system it would all be alright."
r108 extended the time taken by SPU DMAs, inadvertently causing this issue. My
query is what did this visibly improve, and are those improvements worthwhile
compared to the regression of lots of games no longer working*, particularly if
a proper fix can only be achieved by a reworking of the DMA implementation and
timing system?
If there's no visible improvements then perhaps we should revert r108?
* I've only tested 10-20 games, there's potentially lots more not working
rather than just those listed above.
Original comment by matbur...@gmail.com
on 3 Feb 2011 at 12:47
dave mirra bmx also affected after main fmv
Original comment by sjbell1...@gmail.com
on 27 Oct 2011 at 10:17
This is a sh4 bug, so?
Original comment by renatout...@gmail.com
on 1 Nov 2011 at 3:15
[deleted comment]
In the meantime, I built a new .exe with the r108 changes reverted, which runs
these games just fine.
Info and download link here:
http://www.ngemu.com/forums/showthread.php?s=71f18e60e94e62a98c582600616a345f&t=
151606
Original comment by matbur...@gmail.com
on 2 Nov 2012 at 10:46
Star wars racer too
Original comment by correo...@gmail.com
on 19 Aug 2013 at 10:46
#9: Would you mind reuploading this build again? The links seems to be dead.
Original comment by claud...@hausnetz.lettenbach.com
on 11 May 2014 at 9:43
found it, the link is now:
http://ngemu.com/threads/nulldc-r141-improved-compatibility-version-available.15
1606/
Original comment by claud...@hausnetz.lettenbach.com
on 11 May 2014 at 9:46
Original issue reported on code.google.com by
matbur...@gmail.com
on 5 Jan 2011 at 4:55