Is the Hatari core working? I have placed the tos.img image in the system/bios directory but it crashes after selecting a rom.
I wanted to provide a better report, but I couldn't start Retroarch from command line after mounting the pnd and executing runscript.sh.
I did test it, and yep, it tries to find tos in the wrong place, but it crashes with a Bus Error, don't know if it's related.
It's on my TODO list, so maybe you will see it as an update next time.
I did found some more that are slow and/or crash, and prone to be removed, but thankfully there's good subtitutes for them.
Not sure if this is expected behaviour, but retroarch.cfg file is wiped every time after removing the sd card with Retroarch from the pandora, reinserting the card and starting it again. Retroarch then crashes and the cfg file is present but empty (0 kb)
I am now shutting down the Pandora before removing the card.
Can't replicate your problem.
Did you unmount before removing the card?
Just noticed a recent commit on github that mentioned the same error.
https://github.com/libretro/picodrive/commit/c7d7ac71a421c43c0c701b18c58b87fc868e02d8
Noticed the same day it was posted and i did compile with armv flag, with all the extra flags from Codeblocks PND, works fine and no strange errors, so it will be on the next release,
Thx for the feedback.