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From: Larry McVoy <lm@mcvoy.com>
To: Bakul Shah <bakul@iitbombay.org>
Cc: Computer Old Farts Followers <coff@tuhs.org>
Subject: Re: [COFF] Tonight's epiphany
Date: Wed, 26 Jan 2022 19:32:41 -0800	[thread overview]
Message-ID: <20220127033241.GA18469@mcvoy.com> (raw)
In-Reply-To: <E0996B84-45C1-4DE2-B24B-FAF6A9BDF9DE@iitbombay.org>

I'm still waiting for the self timed logic I was taught in the 1980s.
Does anyone know why that is not a thing?  It seemed smart back then.

On Wed, Jan 26, 2022 at 07:00:52PM -0800, Bakul Shah wrote:
> 
> 
> > On Jan 26, 2022, at 6:09 PM, Adam Thornton <athornton@gmail.com> wrote:
> > 
> > "Reflections on Trusting Trust" plus the fact that no one has designed new real computers at the gate level for at least 30 years, maybe longer--it's done in an HDL of some kind, which is to say, software--means it's already way, way too late.
> 
> https://arith-matic.com/notebook/4bit-7400-homebrew-computer-cpu
> https://eater.net/8bit/
> http://cpuville.com/Projects/Original-CPU/Original-CPU-home.html
> 
> Then there are people like Ken Shiriff who are revese
> engineering from die photos of a chip!
> https://www.youtube.com/watch?v=aHx-XUA6f9g
> 
> Of course, you may need some machine learning to reverse
> engineer a modern chip with bilions of transistors to see
> if some surreptitious logic was sneaked in!
> 
> You may need some way to prove the manufactured chip is
> exactly what was specified. Probably impossible today.
> 
> _______________________________________________
> COFF mailing list
> COFF@minnie.tuhs.org
> https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff

-- 
---
Larry McVoy            	     lm at mcvoy.com             http://www.mcvoy.com/lm 
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  reply	other threads:[~2022-01-27  3:32 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-27  2:09 Adam Thornton
2022-01-27  3:00 ` Bakul Shah
2022-01-27  3:32   ` Larry McVoy [this message]
2022-01-27  4:30     ` Bakul Shah
2022-01-27  7:37     ` Peter Jeremy via COFF
2022-01-27 20:41     ` Derek Fawcus
2022-01-27  5:33   ` Efton Collins

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