MAME development: lr-mame2003 Updates

dankcushions

25th February 2017

Fixed frameskip caused by B button
Thanks to @RumblinBuffalo for spotting!
See https://retropie.org.uk/forum/topic/8331/lr-mame2003-speeding-up-with-b-button-press

24th February 2017

Backported a few refresh rate fixes from current mame
By default these won't be visible, but you can read about the fix and how to see it here, if you care! https://github.com/libretro/mame2003-libretro/issues/75

dankcushions

couple of big ones:

August 2nd 2017
Mortal Kombat 2/3 (and others?) sound distortion fixed! these games are now fully playable on pi3. this fix was also funded by @GreenHawk84 and @vince-geekcore - thanks both!
August 5th 2017
Killer Instinct 1/2 now work on x86 and pi! thanks to @markwkidd - kinst loads, and runs at about 2 FPS on pi3. very unplayable, so be careful what you wish for ;) however x86 users can at least run it, and it should be playable.

GreenHawk84

@dankcushions So glad to help contribute to the improvement of Mame on Retropie!

Riverstorm

@greenhawk84 said in MAME development: lr-mame2003 Updates:

@dankcushions So glad to help contribute to the improvement of Mame on Retropie!

Thank you good sir and @markwkidd for the new additions and @dankcushions for keeping this thread of enhancements and improvements you've done.

pjft

Oh, wow, well done and thanks for the update!

I take it an update from source would sort it out then?

dankcushions

@pjft said in MAME development: lr-mame2003 Updates:

Oh, wow, well done and thanks for the update!

I take it an update from source would sort it out then?

yes! you could try via binaries first, as they may have been updated. source will take about 30 mins on a pi3

MrJordaaany

@dankcushions Awesome updates, will update when I get of work :)

MrJordaaany

@dankcushions When this update says 'sound distortion' fixed for Mortal Kombat 2 and 3. Does it mean how the games are really quiet? I've updated but no difference this end.

dankcushions

@mrjordaaany said in MAME development: lr-mame2003 Updates:

@dankcushions When this update says 'sound distortion' fixed for Mortal Kombat 2 and 3. Does it mean how the games are really quiet? I've updated but no difference this end.

no - the horrid distortion and delay that previously happened after ~10 mins of play. volume can be easily adjusted via the service menu: https://github.com/RetroPie/RetroPie-Setup/wiki/lr-mame2003#service-menu

GreenHawk84

@mrjordaaany that will never change, the games were designed with a starting volume. You have to adjust that on the actual game options.

MrJordaaany

@dankcushions @GreenHawk84 ah I see. Thanks for the info.

UDb23

@dankcushions said in MAME development: lr-mame2003 Updates:

this fix was also funded by @GreenHawk84 and @vince-geekcore

Is it possible to request specific fixes to the libretro team by funding ? How?
As you may remember I'd like to have sounds in Deep Scan (Invinco/Deep Scan dual game).
For a Mame developer it shouldn't be complicated.

Thank you all for making lr-mame2003 better and better!

pjft

@udb23 have you tested it in MAME 2010 or AdvMame?

dankcushions

@udb23 we use www.bountysource.com to post bounties on github issues. this one was fixed by a developer new to libretro, i believe. the power of open source!

however, i think your issue would only be viable if it's working in MAME 0.78 standalone (like the mk2/3 issue was). i think if it isn't, then you're better finding out which version of MAME it does work, first.

UDb23

@pjft According to mameinfo.dat sounds are still not implemented in mame driver. It should/could use samples from "Depth Charge".

pjft

@udb23 I suppose I was kind of getting at what @dankcushions suggests. If you find a version of MAME where it works, maybe someone will try to backport it. But if it's not available anywhere, that'd be harder.

UDb23

@dankcushions Understood thanks. Did more checking and unfortunately it seems Deep Scan still has no sound even in latest mame. The fact is that vicdual machines had same mainboard but different specific soundboards.
On the other hand recently support for sound daughterboard in N-sub (another vicdual rom) has been added. I posted a comment on that github commit (here) requesting if this could help also for getting sounds in Deep Scan. If anybody wants to request it too there, maybe it can help ;-)

caver01

@udb23 I am thinking maybe the best value in this kind of request would be to try to fix the root cause of the Service Mode issue—games like Sarge, Xenophobe, Rampage and a bunch of others that just stall at launch. I suspect there is some common cause (underlying original hardware similarities?). May it is already being tracked—but this would give us a bunch of games that we wouldn’t have to setup with other emulators.

darknior

WOAW so cool to found some one working on MAME 2003 for PI (and PC)
It is one of the best emulator ever :)
On xBox 1, with a 700Ghz proc and 64 Mo RAM we can play so many games, why not on PI lol

On xBox Mr gamezfan help by IQ_132 update our MAME 2003 with many code and drivers take on the last PC MAME versions ... to have more games fixed and 100% playable and some new one, always on the old MAME core faster on old machines :)

Maybe, i think it is a good idea, you can speak with him and watch his code, compare with yours, to upgrade PI version like the xBox version. The best one i think for light computers.
If i remember fine, it is based on MameDox that is a fork of MAME 0.84.

http://www.emuxtras.net/forum/viewtopic.php?f=183&t=5732
The project began in 2013 ...
http://www.emuxtras.net/forum/viewtopic.php?f=181&t=3349

xBox Emulator & Source Code : 209 Mo
https://www.mediafire.com/file/wi9b92c88dofl2d/MAMEoXtras Final.7z

dankcushions

@darknior mame 0.78 has an x86 dynarec for the MIPS cpu used by killer instinct, so it already runs much quicker on x86 hardware (eg a PC, or the original xbox). pi systems have an ARM cpu, and there is no dynarec for that. their code is not helpful here - i've already looked at it.