SYSTEM OVERVIEW

There are two parts to the Cricket software: the Logo compiler/user
interface that runs on the host, and the runtime interpreter that runs
on the cricket.  The runtime interpreter supports a
procedurally-oriented byte code language.  The runtime interpreter is
written in PIC assembly language. 

Cricket Logo is a compiler that translates a dialect of Logo into the
byte codes.  It is written in Java.  

There is a strong correlation between Cricket Logo primitives and the
byte coded primitives understood by the runtime interpreter.  This
document provides enough information to allow you to create your own
compiler that translates from your own language specification into the
byte codes understood by the runtime interpreter.

When using Cricket Logo, the normal flow of operation is that the user types 
in a command which is translated into byte codes.  These are downloaded to 
the Cricket (using the communications protocol described in the file 
"comms.txt") and then executed by the runtime interpreter.