Both are 'old', but one of them was a clean sheet design and the other was a stop-gap processor designed to sell a few units until their iAPX 432 was finished.

Both are 'old', but one of them was a clean sheet design and the other was a stop-gap processor designed to sell a few units until their iAPX 432 was finished. See "History of the 8086" from here: http://www.righto.com/2020/06/a-look-at-die-of-8086-processor.html http://www.righto.com/2020/06/a-look-at-die-of-8086-processo... See "History of the ARM chip" from here: http://www.righto.com/2015/12/reverse-engineering-arm1-ancestor-of.html http://www.righto.com/2015/12/reverse-engineering-arm1-ances... It's depressing to think about how Intel was putting so much energy into a chip that never succeeded and succeeded with a chip that they never intended to keep around.