Got a (rare) C64 COMAL 80 cartridge ! (derived from simplephpblog file blog\content\11\02\entry110206-192251.txt)
Not very spectacular, but that's still a good news for me.
A very smart alternative for the build in BASIC 2.0, that's COMAL80.

It's working without any special procedure... just insert cartridge and start the C64:

It's an almost dead programming language, but if you have only the choice between BASIC, COMAL and Assembler, it's worth a try. COMAL80 was a mixture between BASIC and PASCAL, but feels a bit more like BASIC than PASCAL.
For the C64, there is another comparison to BASIC 2.0 here: LINK
If you're curious about COMAL, try the related link below ;-)
Related link