I’m having the same issue when loading .dsk files. The standard green screen comes up and throws an SN error. No .dsk files will load. No issues with .cas files though. Today I installed the emulator from the latest source, dropped the bas13.rom in the BIOS folder, and dropped .dsk files in the coco folder under roms. Retropie version 4.5.1 installed.

@steve-bamford Not a problem. xroar is a "niche" emulator at best. We gotta stick together. Enjoy. Get yourself a full game ROM set and go crazy!

@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.

@edmaul69 I stumbled upon this 3-year old thread when trying to load .dsk images. Posting to help others. The OP (original post) is about loading cassettes, but the last topic was about loading .dsk files. Let's finish the thread... In short, when trying to load any .dsk image, you will arrive on a DISK EXTENDED COLOR BASIC green screen with "OK" showing and a cursor blinking. At this point, you will need to execute Tandy/CoCo disk management commands in order to properly load games. To remind myself of this, I created a subfolder in roms/coco called simply "Disks" and moved all .dsk files there. Then I attached a PNG to the "Disks" sub-folder to remind me and others that there is manual labor ahead: Typically, you enter "DIR" to see what's on the disk, and depending on what files are shown, execute a LOAD <file> command or a "RUN <file>" command. So for Arkanoid (as a popular example): Type DIR You'll see a list of files, including ARKNOID BAS Note: If you get an ?SN ERROR, you are probably using ZIPs. XROAR requires images to be uncompressed. Extension should be .dsk. Type RUN "ARKNOID.BAS" "Loading..." will appear for a bit as the file loads. Afterwards, the game will run. Ctrl-Q to quit (assuming you're using stand-alone xRoar).