moved legacy calls that left into one section, and commented not used devcb calls since we are moving towards devcb2 (nw)
HD63484 updates: [Sandro Ronco]
- converted to use a 16-bits address map
- implemented RPR, MOD, SCLR, SCPY, LINE, PLG, PLL, 
  CRCL, ARC, FRCT, PAINT, DOT, PTN, GCPY commands
- added pattern RAM emulation