Newsgroups: comp.sys.transputer From: Rupert Pigott Subject: Re: Odd T2 question... Organization: AeroPig (Flying Pigs a Speciality) Date: Thu, 12 Mar 1998 22:12:50 +0000 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <35085DE2.87BE20AC@globalnet.co.uk> steve wrote: > One for the old-timers, this, I'm afraid... > On the T222, the speed is nailed down, rather than set with > ProcSpeedSelect. A couple of questions, if I may... > Given that the 2 available speeds are so similar, was this a bin-sort > exercise, and, if so, did this mean that people were testing the bare > dice, then bonding out differently based on the speed, or were a few > packaged up and tested, then the rest of the wafer bonded out to match? > It's just that I can't see any easy way to do what was done. Does anyone > know which bit of the T222 it was that died first as clock rate went up? > > Thanks for any help, > Steve There is no way I can speak as an authority, however I would guess that the speed was selected via laser etching (?) the die - which is I think how they dealt with duff rows in memories too. Cheers, Rupert.