Those were fun. One of the cool thing about them is that most of the stack was written in Java. The JVM itself was written in Java, the operating system was wr

Those were fun. One of the cool thing about them is that most of the stack was written in Java. The JVM itself was written in Java, the operating system was written in Java, and there was only a small bit of C code for initial bootstrapping and some C microcontroller code for some things (interrupt handling if I remember correctly).