I submitted it for my second year technology project at secondary school and the teacher was a proper old skool carpenter who had been forced to use a BBC micro as part of this "new fangled" computing thing they were now having to cover and i swear he had no idea at all what i had done and was just stood there as this 12 year old kid was explaining to him about toggling the wait state pin on the CPU and i may as well have been talking in latin