I'm trying to set up an SD card to dual boot RISCOS and Retropie so that I can play some Acorn Archimedes games as well.
It says on the website that the NOOBS boot loader can install RISCOS.. but when I go to do it, it's not in the menu.
I've tried PINN as well and have had the same problem - it just doesn't appear in the menu.
So I tried using the RISCOS image from the website as a local image with PINN, with no success. Investigating further, I think the problem is that it's a .img file but PINN expects to see .tar.xz files of the relevant partitions.
Is there some way that I can convert a .img file to .tar.xz? Either on Windows or Raspbian?
Or is there some other bootloader I can look at that is good for RISCOS?