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)}

Mine will be completely based on interrupts, where everything is an interrupt.