Now we are in a position to see the actual sequence of micro-events during a CSC-1 machine instruction. These micro-events are nothing more than control wires getting turned on and off by the hardware DFA, yet they direct the flow of data and the selection of processes to be done, thereby implementing what seems to us to be a single but sometimes complex instruction. First, we will examine ADD.

The ADD instruction has the following operand structure:

ADD     x

or in the machine language of 1's of 0's:

0011 xxxxxxxxxxxx