By following the link below, you can see the tuning of the PAL and NTSC Sega Master System as I have implemented it. To avoid confusion of the various ways of naming MIDI notes, I have shown the tuning in comparison to MIDI note numbers. The resulting PAL and NTSC frequencies are compared to 12-TET equal tempered tuning.
This comparison is in cents, and has been rounded to two decimal places. The lowest MIDI note number that the Master System can play is MIDI note 45 (an 'A' two octaves below a concert 'A').
The tuning of the Master System above around MIDI note 101 begins to go horribly pear shaped, but this surely forms part of the character of playing chip music on a machine such as this. I suppose this brings up the interesting topic of how the tuning limitations of a system influence the feel and aesthetic of the music that is made using it.
Link: PAL and NTSC Sega Master System Tuning