ruud.baltissen_at_abp.nl
Date: 2002-10-04 12:09:28
Hallo allemaal,
During my breaks at work I'm working on a Pascal-compiler that should
produce 6502 code. One thing I'm unfamiliar with is the layout of
reals/floating point. Preferably I want to use the format of C= Basic
because that enables me to use some of the original ROM-routines for
calculations thus a shorter program. But that is not a must.
Thanks for any help.
FYI: the compiler is written in Turbo-Pascal in the first place. But I don't
see any reason why the executable could not compile the original source and
thus produce a native 6502 compiler. But I haven't any idea of the size yet.
The idea is to use compiler directives to tell the computer things like what
computer it is, starting address of the code and/or data.
The code is free of course. This can help someone else to build his own
COBOL-, Fortran- or whatever compiler. The code itself cannot be used of
course but the embedded ideas/algorithms can.
Why do I build my own Pascal compiler? I only know of one free C64
Pascal-compiler incl. source and that one is horrible. I found some other
compilers incl. source like Free Pascal but they turned out to be too
complicated.
One personal advantage: to save memory I was forced to work with pointers
and I really learned a lot about how to use them. As side effect it did help
me understand how to code better in C.
Hmmmm, what about running Star Commander on a CommodoreOne one day :)
Any suggestion, remark, critic, question or whatever is welcome.
--
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/ __|__
/ / |_/ Groetjes, Ruud
\ \__|_\
\___| http://Ruud.C64.org
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