views:

508

answers:

1

From a purely theoretical level, how few transistors do you need to build a working CPU?

+4  A: 

Interesting, but hard to say. You would need to define some parameters:

  • What instruction set
  • in-order or out-of-order
  • pipelined or not
  • branch-predicting or not
  • register width

The 8088 has 29k transistor, but I doubt that woudl be what you're looking for.

Calyth
You don't need to define those parameters at all. Just use whatever uses the least transistors.
paxdiablo
I saw a chart somewhere about the "evolution" of less transistors. Doesnt the new nano-stuff got very low transistor count?
Filip Ekberg