ITT: Make your own instruction set.

Make your own instruction set for your own made up processor.  How many bits can it access?  What kind of tasks will it be used for?  Bonus points for making an implementation in sepples, FIOC, lisp, or other GENERAL PURPOSE SCALABLE COST-EFFECTIVE ENTERPRISE QUALITY PROGRAMMING LANGUAGES_{(such as java)}

My processor shall contain a single memory location, BUFFA, and its instruction set shall support the following primitives: a, b, c, d, r, n, $, | and ;.

It can be used for any imaginable computation.