Ásli is a register machine which can be used for learning the basic concepts of register machines. It uses Sexp program files as input and features a stack, simple arithmetics, and conditional jumps. The register machine comes with a lean Swing GUI that supports editing the program, stepping through and monitoring the registers, and the stack. It aims to be a lightweight, but usable and extendable, learning environment for students and adults that want learn about register machines and register based virtual machines.
You really got me until the middle of the text, then I realized: "No, that can't be..." - *think*... 1st April! *hahahahaha*