Compiler at work visually !

I am looking for a sample compiler (preferably for Pascal) that have the
following features:


1. educational tool
2. visually demostarte the mechanics of the compiler (in simulation):
      a. front-end process (lex. analysis, etc.)
      b. back-end process (target code generation, etc.)
3. symbole table management (visulized meta4)
4. ineractive and user friendly


If such tool exists (or under investigation) I would be highlly
appreciative to get further info., and if it dose not exist, then I will
be doing it from scratch for pure educational purposes, as to be an
aiding tool for enhancing computer science students comprehenion re
compiler theory and compilers mechanics. And then it will be ("after
success") simply a free tool for all to use! :)


Thank you all in advance.
--
Ahmed Al-Olaimi
Computer Science Dept.
Kuwait University
--

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