Note that its "custom stack machine instruction set" is an interesting subset of Java bytecodes. The most common bytecodes are interpreted by a single narrow mi

Note that its "custom stack machine instruction set" is an interesting subset of Java bytecodes. The most common bytecodes are interpreted by a single narrow microcode instruction while the more complex ones are executed by little programs. A wider and more parallel microcode would make the complex instructions faster but would make the hardware larger without helping the simple bytecodes very much. The focus of this project is real time instead of absolute performance, so things like caches are added in only limited ways since they get in the way of predictable execution times.