I think your suggestions are excellent. As for Neil's questions, I am working on something similar (when I get spare moments) but it should be possible. I don't believe that these ports were locked off for the single chip NES.
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Dr. Mike Reddy, Future Technology, Games Development and A.I., Division of Computing, Newport Business School, University of Wales, Newport, Allt-yr-yn Campus, Newport South Wales NP20 5DA
Technoleg y Dyfodol, Datblygu Gemau a D.A., Yr Adran Gyfrifiadureg, Ysgol Fusnes Casnewydd, Prifysgol Cymru, Casnewydd, Campws Allt-yr-ynn, Casnewydd, De Cymru NP20 5DA
Tel/Ffôn: +44 (0)1633 432452 Fax/Ffacs: +44 (0)1633 432307 Mobile/Symudol: +44 (0)7971 170 199
Email/Ebost: mike.reddy @ newport.ac.uk (remove spaces/dilëwch y bylchau)