Changes
* |SPEAK - Loaded the ROM software, listed the commands and said the sentence 'DK'tronics speech synthesizer' (badly)
* |SPON - Used to turn on the read buffers interrupt
* |SPOF - You can guess what that one did yourself.
* |FEED,n - Feed data directly into the speech buffer (up to 30 comma separated values between 5 and 63)
* |FLUS - Cleared both the speech and text buffers
