The Megaprocessor
A 20kHz behemoth CPU you can actually see in action.
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Ever since the earliest days of computing, scientists and engineers have focused on building machines that were smaller, faster, and less expensive than the previous generation. Now, one British man has taken it upon himself to reverse that trend. James Newman, of Cambridge, recently unveiled his completed Megaprocessor a fully functional CPU built to human scale, with LEDs that light up at every stage of the computational process to show how data moves through a circuit.
The Megaprocessor is a 16-bit design with four general-purpose registers, a program counter, a processor status register, and a stack pointer. It has 256 bytes of memory and a 500W power supply (most of the latter is dedicated to the LEDs). The memory block contains 27,000 transistors. The CPU’s transistor count comes out to 15,300, but much of this is also devoted to the LEDs. Subtract those from the equation, and the total CPU transistor count seems to be about 6,800. That’s roughly 2x as many as the original 6502 microprocessor, though the 6502 was a bit smaller. Computation is handled via a 16-bit ALU and 16-bit adder, there’s no word on whether or not Newman intends to offer a separate floating point unit, though the installation requirements for such hardware would likely be formidable.
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