I am looking for public domain basic interpreter with source
code available. I need the source code to help me understand
how to write an interpreter such as Basic, so it is more
educational than practical usage. Or someone can direct me a
book or article for the same purpose.

David

Both faq's to comp.lang.basic.misc mention source code to several Basic
interpreters (1 in Pascal, 2 or 3 in C, 1 or 2 in Z80 assembly).

One faq is here: <http://www.fys.ruu.nl/~bergmann/basic.html>

---

#include <canonical.disclaimer>         // I speak only for myself, etc.

From the FAQ

Name  :- Bywater BASIC 1.1
Where :- http://www.fys.ruu.nl/~bergmann/basic.html
         The file is bwb110s.zip (ANSI C source code only)
         Also available from:-
         ftp://simtel/msdos/basic/bwb110s.zip (ANSI C source code only)
         ftp://simtel/msdos/basic/bwb110e.zip (MS DOS version executable)
Price :- Freeware
Notes :- The source code in ANSI C of a BASIC interpreter. Does not support
                  system dependent keywords like CLS, POKE, PEEK, INKEY$, etc.

--
Douggie

|>

|> > >I am looking for public domain basic interpreter with source
|> > >code available. I need the source code to help me understand
|> > >how to write an interpreter such as Basic, so it is more
|> > >educational than practical usage.
|> >
|> > Both faq's to comp.lang.basic.misc mention source code to several Basic
|> > interpreters (1 in Pascal, 2 or 3 in C, 1 or 2 in Z80 assembly).
|> >
|> > One faq is here: <http://www.fys.ruu.nl/~bergmann/basic.html>

|> >
|> From the FAQ
|>
|> Name  :- Bywater BASIC 1.1
|> Where :- http://www.fys.ruu.nl/~bergmann/basic.html
|>          The file is bwb110s.zip (ANSI C source code only)
|>          Also available from:-
|>          ftp://simtel/msdos/basic/bwb110s.zip (ANSI C source code only)
|>          ftp://simtel/msdos/basic/bwb110e.zip (MS DOS version executable)
|> Price :- Freeware
|> Notes :- The source code in ANSI C of a BASIC interpreter. Does not support
|>                   system dependent keywords like CLS, POKE, PEEK, INKEY$, etc.
|>
|> --
|> Douggie
|>
Try the following location.  This location also has phil's basic.  The
bytewater basic is 2.1.  I have input this data to faq but it never appeared
in any subsequent release.

   The source code for bwBASIC 2.10 will be posted to network news
   groups and is available immediately by anonymous ftp. To obtain
   the source code, ftp to site ftp.eng.umd.edu, cd to pub/basic and
   get the file bwbasic-2.10.tar.gz.

--
    _      _     Dale DePriest                  San Jose, California

 o/_/ (_(_X_(`                                  fax: (408) 943-0402

[snip]

Sorry Dale, I've checked my mail archives and found no trace of an email
from you. Maybe you posted it here? In which case it's hidden in about
10 meg of zipped archive :)
Thanks anyway, the info will appear in the next version of the FAQ, which
I intend to start posting weekly (unless there are serious objections).
--
Douggie