README.TXT for Modula-2 Graphics Demo                        24-Mar-92/Bj
TERRA Datentechnik, Tech Support
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As you can see in the demo program the long overdue EGA/VGA-Graphic
support can be found in the new Modula-2 4.0 library.

Since the graphic modules are implemented in pure assembly you can
expect a very good performance even on PC's of the last generation.

Another nice surprise is the fast execution of the 'Cube'-Example.
You should consider that in this (and other) animations a lot of real
arithmetic has to be done.

Notes about the development:

- The program has been produced as a standard DOS project. No special
  compiler options have to be used. Therefore we do not include an
  extra batch or M2MAKE file with this example since it is very
  easy for you to redo the program with your standard tools and
  settings.
  The executable on this disk was M2MAKEed as '/FINAL'.

- If you want to debug the program you have to M2MAKE it with '/DEBUG'
  and do not forget to use the '/FLIP-' option for the debuggers.

- Normally you can try to run the program in different video modes.
  But depending on your screen adapter it sometimes happens that
  the program hangs if you go to far away from the appropriate mode
  for your hardware. Take special care when you select VGA modes on
  an EGA card. It will stress and may even damage your hardware if the
  mode cannot be switched properly.

- Most of the examples can easly adapted for other graphical environments
  like GEM or Windows since the only graphic primitive used in the
  examples is to draw a line.

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