Z:gnu-www-ja-stallman-kth--64b316-This would be a representation/en

This would be a representation inside their compiler for instruction to take the contents of register two, add four and store it in register three. In this fashion you can represent any possible instruction for any machine. So they actually did represent all the instructions this way and then when it came time to try to combine them, they would do this by substituting one expression into another, making a more complicated algebraic expression for the combined instruction.