Some days ago I found a project called Spectrum Next. It's a   
   reimplementation of classic Spectrum with an interesting idea: the   
   HDMI output is made by a Raspberry that reads video ram from main   
   board and build the output that is sent to TV.   
      
   So my thought is if the same concept is applicable also to C64. Maybe   
   in some way we can read video ram (from user/expansion port or from a   
   board between ram chips and socket... etc) and pass data to Raspberry   
   (I think the Zero is enought powerful to manage all) that is connected   
   to TV.   
      
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