- added methods to CModel3 to access sound board and drive board
- added methods to CSoundBoard to access 68K and DSB (if attached)
- added methods to CDSB1 & CDSB2 to access Z80 & 68K respectively
- small code tweak in DriveBoard.cpp
- comment tweaks in Model3.h & Model3.cpp
- added notification message if drive board is disabled when loading incompatible save state
- removed some superflous print statements, but have kept in printing out of force feedback commands for now (which have also been made more visual)
- made sure that feedback state is reset in SendStopAll()
- fixed bug in SendConstantForce which was sending incorrect values at times
- removed friction effect for now, until can determine its exact command seq
- added checking of compatibility of saved state and temporary disabling of drive board if not compatible