OS/2 changes to base source.
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Add the following source
  sndos2.cxx
  sndos2.hxx
  mainos2.cxx
  termos2.cxx
  termos2.hxx
  termos2.rc
  os2res.hxx
  joyos2.c
  joyos2.h

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DefProps.cxx

change
  #include "DefProps.def"

to
//  #include "DefProps.def"

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TIA.cxx

comment out all references to myPreviousFrameBuffer

change
  myFrameWidth = atoi(myConsole.properties().get("Display.Width").c_str());
to
  myFrameWidth = 160;


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TIA.hxx

comment out all references to myPreviousFrameBuffer


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MediaSrc.hxx

comment out all references to previousFrameBuffer

