You may try the standalone px68k emulator and configure a keyconf.dat to map the key to something on an EN-US keyboard. The key code for OPT1 is 0x7 (see here). You may even do this temporary - if there's a game that supports saves on a user/floppy disk you can then re-use the disk with the game started on the libretro core.

@CARRisma Wow! That's an awesome fix! Thank you!

@kelvfimer

Cool !
I agree.

@zering said in [Solved] Sound issue through HDMI with lr-px68x (X68000 Emulator):

@adambegood No worries at all, I'm glad it's finally working for you. Now you can properly enjoy the best game on the X68000!

Indeed, glad to have it in the gaming stable! Hope your Pi repairs are going well today.

@TPR

Did it work ?

bummer - seems like such a great game otherwise. if i ever get past the part on the x68000 version i'll have to save! thanks for confirming, and for the extra info.

i don't have ps1 on my setup; i'll give it a try. hopefully it runs ok on a pi3b+.

Man, I wish more people were interested in the X68K :(

Note that this setting might slowdown the emulation for some systems. If this works to fix the core loading issues, then you should add this setting only in the respective systems' retroarch.cfg, i.e.

/opt/retropie/configs/msx/retroarch.cfg /opt/retropie/configs/x68000/retroarch.cfg

while keeping the video_threaded="true" in the main configuration file to be applied to other systems.

Another thing you can try is to use the retroarch.cfg.rp-dist file instead and see if replacing the (long) retroarch.cfg with it would still make the bluemsx and px68k cores to crash.

Ok, It works very well!! Thanks. Just last thing: is there a way to configure more than 2 buttons on joystick?

Thanks, that's exactly what I ended up doing.

I had hesitated with UXS for a while because I never thought I could get it to work.. turns out it was just generating the xml in a directory/folder I wasn't expecting.

Thanks

@supercatfooz Update: I just found an HDF file that seems to work fine, making the two .dim files I have obsolete. I'd still like to know if multi-disk mounting is possible for the future, though! (plus it'll help whoever else happens to have this problem)

@Pyjamarama You can save your controller settings for that game or across the whole core. Those options are in the control menu in the hotkey+X retroArch menu, right above where you edit the control inputs.

That's a shame. I was hoping it was something I could fix on my own. I do love my Japanese computers. I'm glad to see that an official Retropie guide for the PC-88 emulator showed up within the past few months at least.

In the moment there is only a pull request in es-theme-carbon.
You must wait until it will be merged.

If you want to try it you can copy the folder "x68000" from https://github.com/RetroPie/es-theme-carbon/tree/3ff4d1f136a8e2eacc44fb71aa0abaa36ed94865 to "/etc/emulationstation/themes/carbon".

I haven't tried it until now.