OS BUILDING

GOALS:
Fit on a floppy disk
x86 Architecture
Basic File operations (Delete, Move, Create Dir, list, run)
Simple programs running on the CPU itself

How would I go about doing this. What language should I use?

Stupid question, but it'll be fun to hear the cursing: Does anyone think it possible to write an operation system in a toy language (like LISP, Java, or Haskell) without writing most of it in assembly or C?