Yes it really was well thought out. Another good example is the 'tube' interface for second processors. Enthusiasts have recently put this to use to interface w

Yes it really was well thought out. Another good example is the 'tube' interface for second processors. Enthusiasts have recently put this to use to interface with a Raspberry Pi which can emulate various processors from back in the day at unheard-of speeds, and also provides a modern native ARM coprocessor. The neat thing is that this all works with no changes to the BBC and no special software; you just use the operating system routines as usual on code running on the second processor and it all just works. Not bad for a system designed in 1981. https://github.com/hoglet67/PiTubeDirect/wiki https://github.com/hoglet67/PiTubeDirect/wiki