The RunCPM emulator is very particular about how files are organized!

CP/M uses drive letters (A, B, ...) and user numbers (0, 1, ...). The structure of files on the SD card has to mimic this arrangement and all filenames must be in upper case ASCII only, with no more than 8 letters in the filename and no more than 3 letters in the extension.

So, for example, if you want the file "example.hex" to appear in the "B" drive for the default user (user zero), you would create the folder "B/0" and put the file in it as "EXAMPLE.HEX". A filename like "example.txt" (lowercase) "EXAMPLE.TEXT" (incorrect length of extension) or any filename that contains non-ASCII characters will not be accessible by RunCPM.

For a starter set of files, grab the standard CP/M 2.2 files from retroarchive.org. Create the folder "A/0", and copy the files from that zip to A/0. It's important that you don't create any other intermediate folders!

If you like the classic text adventure game Zork, retroarchive has you covered. You can follow a similar process but put these files a B/0 on the SD card.

With that done, safely remove or eject the SD card from your computer and stick it in the adalogger's micro SD card slot.

For your convenience, and because some browsers don't like downloading from the non-https retroarchive site, you can also download using the links below:

Once you're done, the folder & file structure should look like this: