Couple pics of the adafruit setup. https://photos.app.goo.gl/N2v6iB45pePNFQNA8
The 32u4 is a much less powerful device, but just about perfect for doing the job of TPDD. The Teensy 3.5 & 3.6 are far more powerful, overkill for TPDD, BUT, perhaps really cool for a more feature-full device. The Teensy has audio hardware and enough cpu & ram to use it. So I was planning on seeing if I could get it to play cas or wav files, and record them, to act as a virtual cassette as well as tpdd. Another plan was to use the Teensy's built-in rtc with some small basic program on the M100 to set the M100's clock, or conversely set the rtc from the m100. A dos-installer would be nice too, and should be no problem. There is a pretty straight-forward example in dlplus dl.c sendloader(), and dl.do shows the line of BASIC to kick it off. But it might be possible to emulate what the real tpdd2 does, detecting the state of some serial pins on power-up, and send the loader based on that condition, minimizing what the user has to type manually. -- bkw
