[Coco] PCCTS

[Boisy Pitre]

Well I'm starting to wind down from finals.  One more to go on  
Thursday and I'll be done.

One of the fun classes for me this semester was Compiler  
Construction.  The semester project for that class consisted of  
creating a compiler for an ADA-type language using a toolset known as  
PCCTS.  With my project completed and graded, I want to share this  
work with anyone who is interested.  The tie-in to the CoCo is that,  
besides the compiler, I wrote a back-end for the 6809 that translates  
the compiler's i-code into 6809 assembly that is readily assembled by  
rma and linked with rlink.

While there are still bugs, this is a fantastic way to introduce a  
new high level language for the CoCo, or even to bring a true ANSI C  
compiler to the CoCo.  PCCTS has a grammar for an ANSI C front-end  
that would make an excellent starting point for our own compiler.

Boisy