Question: I've read that actually M4 doesn't support multiload games, this is, once a game is loaded dsk can't be accesed. Does this means that games that makes loads in 64kb systems as Robocop, Target Renegade, etc will not work on 464-664-464+?
That's incorrect, of course any multiload game that uses systemcalls will work with M4 with the proper configuration. Ie. you can play, Robocop, Gryzor, Prince of Persia, Operation Wolf and tons of other multiload games, without problems. You would have to set M4 rom 7 or use the modified lowerrom for maximum compatilibty.
My estimate is atleast 90% of all games will work, if you use a proper cracked version. Which can be easily found of most games.
If there is any particular game that has much interest and doesn't work on M4, I'd be happy to fix it.