Working Dreamcast games

hooperre

This post is deleted!

mitu

@quicksilver Since lr-reicast is already a scriptmodule, if you're willing to give it a try, this is what you need to modify

replace the rp_module_flags with

rp_module_flags=""

in the build_lr-reicast function, replace the single make line with

make platform=rpi3

Try to install from source, the lr-reicast scriptmodule should be in the experimental section.

At some point, I think the lr core was requiring GLES 3, so that's why it was excluded for the Pi, but maybe I'm mistaken.

EDIT: forgot to say, you'll have to modify the $HOME/RetroPie-Setup/scripts/libretro/lr-reicast.sh file. With the modifications from before, the compilation works (GG NO RE), but I havent' got time to test it with a game.

barbudreadmon

Btw, here are the settings that are good for speed :

Enable Threaded rendering
Set Alpha sorting to per-strip
Decrease resolution
Disable Texture Upscaling
Disable Modifier Volumes
Enable Div Matching
Disable DSP
Increase frameskip

quicksilver

@mitu build was successful but any game I launch just sends me back to ES.

@barbudreadmon is lr-recaist compatible with .chd files?

mitu

@quicksilver said in Working Dreamcast games:

build was successful but any game I launch just sends me back to ES.

Looks like a BIOS issue. Launch with verbose logging and look at the log file (/dev/shm/runcommand.log) and see where it's looking for them.

is lr-recaist compatible with .chd files?

It should be - https://github.com/libretro/reicast-emulator/pull/367.

pjft

Even with a CDI file it doesn't run.

https://pastebin.com/21U0SF8d

The last few lines suggest

[INFO] Environ UNSUPPORTED (#65585).
/opt/retropie/supplementary/runcommand/runcommand.sh: line 1006:  5554 Segmentation fault

barbudreadmon

Yes it is compatible with chd, the bioses go into [system]/dc/, [system] being your bios folder for RA cores, same dc_flash.bin and dc_boot.bin as standalone. For naomi support, the bioses are naomi.zip, awbios.zip, f355bios.zip, f355dlx.zip, hod2bios.zip and airlbios.zip from mame romset.

barbudreadmon

@pjft Seems like a no-bios issue too, at the very least i can reproduce a crash at the same moment if i delete my bioses. It might be a good idea to update your RA too, yours might be too old (cf. the Environ UNSUPPORTED messages)

pjft

@barbudreadmon ah, that's fair. My RA is indeed a bit outdated by today's standards.

The BIOS did seem to load in lines 192 and 194 but it might be RA related.

Thanks!

WarC0zes

I tested lr-reicast, but no games are launched, it comes back emulationstation.
I have the bios in Retropie/Bios/dc/
I have this as error : /opt/retropie/supplementary/runcommand/runcommand.sh : ligne 1003 : 5513 Segmentation error

https://pastebin.com/LqnvXhmU

My settings:
Retropie 4.4.8
Rpi 3 B
ES 1.8.1
RA 1.7.6

quicksilver

@barbudreadmon so I updated retroarch to latest version and made sure my bioses are in /BIOS/dc but after launching a game it still kicks me back to emulation station

mitu

I had the same crash while testing, but followed This comment on the Issue tracker and now the core starts.
Only tested Ikaruga (from a .chd) and started a game, looks a bit choppier than the standalone. Note that I didn't apply all the settings that @barbudreadmon mentioned, I only made sure Enable Threaded rendering and put a frameskip of 1 just to check. I suspect lowering the resolution would also help, but remains to be tested further.

Febbweiss

Same thing for me, backing to emulationstation. But lr-reicast works. If you copy/paste the command line in the /dev/shm/rucommand.log and execute it (after quitting or killing emulationstation) the emulator works even Wacky Races.
I don't know why it crashes using emulationstation launcher...

barbudreadmon

I tried the core on my rpi3b+ and didn't experience this issue (i'm using my own custom setup not based on retropie/debian though). You might try what @mitu suggested, aka adding < /dev/null at the end of the command line in your es_system.cfg.

About performances, it was playable in the few games i tried (i tried a few naomi/atomiswave games like "hokuto no ken" too), same as standalone.

mitu

Forgot to mention I'm using a 3B model (non B+). To complete what @barbudreadmon suggested, I've modified the entry for lr-reicast in /opt/retropie/configs/dreamcast/emulators.cfg to get lr-reicast starting.

lr-reicast = "/opt/retropie/emulators/retroarch/bin/retroarch -L /opt/retropie/libretrocores/lr-reicast/reicast_libretro.so --config /opt/retropie/configs/dreamcast/retroarch.cfg %ROM% </dev/null"

WarC0zes

@mitu Thanks, the games are launching now :)

after test, works better reicast than lr-reicast for rpi 3B.

barbudreadmon

@WarC0zes said in Working Dreamcast games:

after test, works better reicast than lr-reicast for rpi 3B.

You probably mean faster (it is, slightly), because lr-reicast is better in terms of compatibility and features, one example is that the dead zone thing mentioned by @backstander is in core options.

WarC0zes

@barbudreadmon Yes, mean faster. After cool for naomi games, but rpi 3b lack of power.

quicksilver

@mitu @barbudreadmon Thank you for your help on this! I now have lr-reicast working on my pi3b+ (overclocked). Testing crazy taxi, performance is at least on par with the standalone reicast and may actually be better. I think Lr-reicast must use something different for audio because the standalone reicast using omx will drop the sound any time the fps takes a dip. Lr-reicast audio however only stutters a little bit when fps dips. Ive noticed this behavior with OMX while using mupen64plus and thats why I switched to SDL for audio when using that emulator.

I cant wait to test more games with this! Hopefully this can be added directly to the experimental emulators at some point in the future.

mitu

@quicksilver lr-reicast will use ALSA, and I think the standalone Reicast also got ALSA sound support, but the launching script might not be updated for it (on the Pi) - from what I noticed looking at the emulators.cfg, it uses either omx or oss.

EDIT: actually, ALSA support was available in standalone Reicast also, it's not a recent addition as I thought.