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So now that we have built all of the modules for our CPU
and we've connected them all to the bus here,
really the only piece left to do is build the control logic
which is really the brains of the CPU.
And so if we look at what we've built so far we've go the central bus here
and then we've got all these modules connected to it
so there's the memory address register, the RAM, the instruction register, program counter,
the A and B registers which feed into the arithmetic and logic unit
which will either add or subtract the values in the A and B register
and then the output register which connects to the display.