[jacquesm]

Oh that's really neat!

Unfortunately I lost all my '09 stuff. Did he write in Asm or something else?

I had a rudimentary random-access storage device going on mine using a Sony TC-FX 33 cassette tape recorder. With a bit of tweaking you could control the buttons from the Dragon and it also had a nifty little optical encoder to indicate 'end of tape' that you could tie to an interrupt giving your a rough idea of where the tape was.

Even with a C120 cassette the storage capacity was terrible but it did work and it was persistent. It wore out tapes like crazy :)

That Dragon really does look mint. Beware of the big caps dying on you and taking the mb with them, it might be safer to replace them pre-emptively that power supply wasn't the best. A huge advantage the Dragon had over the original CoCo was the keyboard, it is really good quality.