The Centre for Computing History, in Cambridge, UK, has a computer made from discrete components that occupies a wall. It can be downclocked to a point where yo

The Centre for Computing History, in Cambridge, UK, has a computer made from discrete components that occupies a wall. It can be downclocked to a point where you can see the code making its way through the machine, fetching data, pushing it through the ALU, and on to either the register file or back into the main memory.