Return-Path: Return-Path: Received: from nsf.ac.uk by swan.cl.cam.ac.uk via JANET with NIFTP to fgate (PP) id <19117-0@swan.cl.cam.ac.uk>; Thu, 11 Apr 1991 01:37:19 +0100 Received: from vax.nsfnet-relay.ac.uk by sun2.nsfnet-relay.ac.uk with SMTP inbound id <28767-20@sun2.nsfnet-relay.ac.uk>; Thu, 11 Apr 1991 01:33:01 +0100 Received: from iris.ucdavis.edu by vax.NSFnet-Relay.AC.UK via NSFnet with SMTP id aa22571; 11 Apr 91 1:30 BST Received: by iris.eecs.ucdavis.edu (5.57/UCD.EECS.6.0) id AA17023; Wed, 10 Apr 91 15:55:43 -0700 Received: from iris.eecs.ucdavis.edu (iris.eecs.ucdavis.edu.ARPA) by hydra (4.12/3.14) id AA03254; Wed, 10 Apr 91 10:59:01 pdt Received: by iris.eecs.ucdavis.edu (5.57/UCD.EECS.6.0) id AA05261; Wed, 10 Apr 91 10:58:40 -0700 Received: by cs.ubc.ca (4.1/1.14) id AA04085; Wed, 10 Apr 91 10:58:26 PDT Date: 10 Apr 91 18:59 +0100 From: Jeffrey Joyce To: info-hol@edu.ucdavis.eecs.clover Message-Id: <1842*joyce@cs.ubc.ca> Subject: help with a reference Somewhere along the way I picked up the following quote: ``A comparatively simple 8-bit microprocessor such as the Z80 has 208 internal memory elements and 13 input signals; meaning that the circuit is capable of 2$^{221}$ different state transitions. Even if a transition could be simulated every microsecond, it would take 10$^{53}$ years to examine all the possible changes. This is far larger than the age of the universe.'' ... but I've lost track of who said and where (but I'm sure that it was said in the context of work on Viper). Anyone out there recall seeing this ? thanks in advance, Jeff