some intial work for input ports .
added inputport definations in pacman and minivadr drivers.
some more works in inputports . still not functional
Z80: added 4 more opcodes for minivadr but still needs more
A few more works into inputports . Now pacman seems to try do something different and needs more Z80 opcodes ;/
Z80 : added 7 more opcodes for pacman . still needs more...