EhBASIC was written to satisfy a need of mine for a portable, stand alone, high level programming language for the sort of 6502 computers I like to build and play with.
The current version can always be found here ...
http://members.lycos.co.uk/leeedavison/ ... index.html
.. along with the available documentation.
If you try EhBASIC and have problems please take some time to read the online documents and at least the comments for memory use in the source. If that doesn't help, or you have any other questions / comments / etc I'll be keeping a regular watch in here.