There's BBC Basic in RISC OS Open; you can configure a Pi to start up at the Basic prompt like an old BBC if you like.
It's not the only implementation, though: the language had also been cloned as Brandy Basic (GPL) and also reimplemented in various commercial versions, notably BBC Basic for Windows. In times past there was also a compiled version (ABC) for RISC OS, though I don't know if it's still functional.
It's not the only implementation, though: the language had also been cloned as Brandy Basic (GPL) and also reimplemented in various commercial versions, notably BBC Basic for Windows. In times past there was also a compiled version (ABC) for RISC OS, though I don't know if it's still functional.