This is a list of things that need to be done
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o merge common parts of VGA, SVGALIB, X11 and AtariFalcon keyboard stuff
  into one source file named like atari_keyboard.c.

o sound recording should store the sound in the .WAV format and should
  be available on all platforms (not only X11)

o draw_display should be supported on all platforms (remove the kludge in
  the Falcon port)

o finally merge the ALLEGRO and plain DOS versions - digital sound is in
  the plain DOS now so just take the joystick and sound card initialization
  from ALLEGRO and you're done

o rewrite joycfg to use curses so it will be usable on all platforms.

o simplify and correct synchronization code in main emulator loop - some
  people still complain that the emulator is slower than the original Atari.

o The obsolete variable "countdown_rate" is still in use within
  "atari_amiga.c" this should be a trivial change, however I'm reluctant
  to do it without an Amiga to check it. I've left it defined in "atari.c"
  so that there are no linker errors on the Amiga.

o fix all known bugs (see BUGS file)