@mcfaria2000 You are using the "Level I" ROM instead of "Level II". There is no SYSTEM command in "Level I" ...

@comegetsome sdltrs has been recently updated and it should be available on the Pi4 again. Just update your RetroPie-Setup script and then you can install it.

@mitu Hi & thanks for your answer i found this site which gives all the color codes :)

@Sebiohazard Can you give me an example - a game that doesn't work ? The info might not be on the scraping site for that particular game.

Please can you have the crc32 for level2.rom of the trs-80?
In the doc file the link for download is old. Error 404.
If can give me all crc32 for all bios?
Thank you very much.
Sorry for my bad english.

@xdrak Sometimes you can't see for looking!
It's a pretty obscure emulator, not sure a lot of people on here use it. I use it for DRAGON32.