Export byte data for SAATunes project about saa1099tracker

[mborik]

1. There must have been a misunderstanding. SAATunes is arduino-something that trying to play MIDI files on SAA1099 (and let's be honest, it's pain to listen to). 🙂
2. VGM export is already requested feature but there's an unbearable number of TODOs that are need to be done as a matter of priority, that VGM export is somewhere down the line. Unfortunately, I'm on my own on all this - everyone just has feature requestes, but no contributions to the code. 🤷‍♂️
3. Regarding to PIP80, I see it very simple. Binary export for Z80 is already implemented and well documented, so:
   • you've just to generate binary compilation with Player included
   • put that binary into the PIP80 memory
   • make a simple code that firstly call "Init song address"
   • then calling regularly in every interrupt "Play address", for example:

        call SMTF_init
loop:   ei
        halt
        call SMTF_play
        jr loop