Two years ago, the Gigatron arrived on the retrocomputing scene. It needs just 930 logic gates (packed into 33 standard 7400-series ICs) to create a computer that beat ‘complex’ 1980s home computers like the VIC-20 in terms of both CPU power and graphics. Without microprocessor, graphics, or even an ALU chip, the machine can do this sort of thing with effectively only half of the transistor count inside the 6502 CPU alone. Quite a feat, but more importantly, the hardware is simple enough so that anyone can figure out how it works. Read about it in my previous post
See the full details on Obsolescence Guaranteed blog.