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)}

>>11
I've always wondered what it'd be like to write code for a processor with bit-level variable-length instructions. You could pick the opcodes of the most common instructions to be the shortest, and the least commonly used to be the longest.