MGBA Core not working?

[JustMeDaFaq]

Hi,

its said that the mgba core works, but it doesnt?

Any hint for what needs to be looked into, to make it work? (also other cores?)

[ptrvg]

mgba did not work for me either. I am able to load gba roms with vbam_libretro.dll. The screen flickers though. Snes9x works perfect.

I am mostly interested in getting mame arcade emulation working for my project. Unfortunately I am not able to correctly load a rom because bool ret = Libretro.RetroLoadGame(ref gameInfo); returns false. The rom path is correct so I must be missing something in the environment setup.

As a test to load another core I was able to load stella for atari2600 emulation. The game works, but I need to adapt the framebuffer to output to the screen correctly.

Have you tried to get more cores working?

[JustMeDaFaq]

@ptrvg got snes,gba,nes and gb/gbc working. Im currently debugging whats wrong with the mupen core in unity. Seems like Unity crashes when mupen uses libco to start a coroutine. Right now, im writing an workaround for it.

Can have a look at Mame Arcade Emulation at the weekend if it helps you

EDIT: Sorry for my bad english

[ptrvg]

@JustMeDaFaq I would love it if you could get Mame working. My Unity project is a port of my 3darcade emulator frontend to Unity that I started two weeks ago. So yeah Mame is the one I am after!
See: 3darcade Unity , old one 3darcade

There are a few Mame cores. For performance reasons I would like to use mame2000. or mame2003. But any will do. I only succeeded to load a game with the default mame.libretro.dll core. But then it crashes on the first update call.

[JustMeDaFaq]

@JustMeDaFaq I would love it if you could get Mame working. My Unity project is a port of my 3darcade emulator frontend to Unity that I started two weeks ago. So yeah Mame is the one I am after!
See: 3darcade Unity , old one 3darcade

@ptrvg
Seems my idea for mupen64 core worked out well. At least, it boots the game. Need to test if its stable tho, time for Super Mario 64 ;)

Looks awesome your project, so Mame will be next! :)

[ptrvg]

@JustMeDaFaq Damn you work fast...have fun with Mario!

[JustMeDaFaq]

@JustMeDaFaq Damn you work fast...have fun with Mario!

@ptrvg

Worked the last two days on it, didnt wrote c code for a long time, so it took me a bit to get back into it ;D

Had a quick look at the Mame2003 core. Main issue seems to be also related to the libco library. But the workaround applied to mupen should work for the Mame2003 one too, i guess. And a minor Environment stuff. Hope that i get to work on Mame on Thursday, shouldnt take too long.

[ptrvg]

@JustMeDaFaq Big thanks for doing this!
C# and in fact any c language are completely new to me. So figuring out the libretro.h implementation in LibretroWrapper.cs was and is a bit of a challenge for me ;)

[Scorr]

hey sorry bout that, I just checked and mgba doesn't work for me either. like ptrvg said, vbam_libretro does work if you need gba. I just pushed a potential fix for the flickering, let me know if it still happens.

I'd like to make this repo compatible with any libretro core but I haven't gotten to looking into it because I never got sound working properly on the cores that do load. that's been the main blocker and that's why this repo hasn't been updated much.

[ptrvg]

hey sorry bout that, I just checked and mgba doesn't work for me either. like ptrvg said, vbam_libretro does work if you need gba. I just pushed a potential fix for the flickering, let me know if it still happens.

I'd like to make this repo compatible with any libretro core but I haven't gotten to looking into it because I never got sound working properly on the cores that do load. that's been the main blocker and that's why this repo hasn't been updated much.

@Scorr Hi. I tested the new version a bit an for me it still has the flickering with vbam.

Yes it would be great if the repro could support more cores. From what I have read so far getting sound working properly is very difficult with libretro. Unfortunately I dont have the technical skills to be much of a help beside from testing.

[JustMeDaFaq]

@ptrvg @Scorr Which game did you try? 32 or 64bit version of the core?
Tried pokemon firered, video isnt flickering for me.

[ptrvg]

@Scorr @JustMeDaFaq
I tried super monkyball jr and Herg's Solitaire.
That was with an older 32 bit core.

I now tried the latest cores directly downloaded from retroarch:
vbam_libretro.dll crashes Unity for me with both games
vba_next_libretro.dll works ok on both the old and new version of the repro with no flicker.
All cores are 64bit.

So yeah my fault, I should have done more testing before reporting the flicker issue.

[JustMeDaFaq]

@ptrvg Got Mame2003 core working yesterday. Worke fawlessly on android, a bit buggy on windows tho. Il look at it tommorow! :)

[ptrvg]

@JustMeDaFaq Damn that is great news! Looking forwards seeing it in action. I will only be able to test the windows version. I have no android devices.

[JustMeDaFaq]

@ptrvg Had no luck getting it to work reliable. It randomly fails.
Seems that nothing is missing but that its related to how unitys native function calling works.
Have no idea if theres an solution for it.

Im thinking about to switch to unreal engine

[ptrvg]

@JustMeDaFaq Thanks a lot for trying. You have come much further than I did. Are you willing to share what you have got so far? I still like to see it.

New retro arcade neon uses libretro with the unreal engine. So yes it has been done before, so that should work for you. I don't know much about the unreal engine besides that it uses c++. That is a bit scary compared to Unity's c#. The only modern language I know well is Swift...