Date: Sat, 19 Sep 2015 16:10:32 +1000 From: Peter Jeremy <peter@rulingia.com> To: Bob Bishop <rb@gid.co.uk> Cc: Hackers freeBSD <freebsd-hackers@freebsd.org>, freebsd-hardware@freebsd.org Subject: Re: ECC support Message-ID: <20150919061032.GB20691@server.rulingia.com> In-Reply-To: <A694618D-FE07-4E56-A0E0-890E7C8BD4EE@gid.co.uk> References: <CAA3ZYrBXZn1WpHWYGJYWJDPsk7iDahCas8RhnHC4w%2Babf4w4hA@mail.gmail.com> <55F88A18.6090504@FreeBSD.org> <20150916035904.GE67105@kib.kiev.ua> <93871ADA-EDA3-481C-9959-1D371AB44479@gid.co.uk> <CADWvR2gBDjKFRW-X6ECJaGG7tSvOgk0rTk38O1qQ0hUWjRBF_A@mail.gmail.com> <3678FC1E-DDC5-4FB2-B6E9-6FC90D0C988E@gid.co.uk> <CADWvR2ha0-ifBYTswdVF7tzZsHayf%2BKXVdk86S0tuuPmLKj6cg@mail.gmail.com> <93106DFF-9741-4515-B6E0-AC43C0AF2179@gid.co.uk> <A694618D-FE07-4E56-A0E0-890E7C8BD4EE@gid.co.uk>
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--0OAP2g/MAC+5xKAE Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2015-Sep-18 00:05:35 +0100, Bob Bishop <rb@gid.co.uk> wrote: >The answer is quite interesting. A few process shrinks ago, alpha particle= effects were becoming worryingly intrusive and everybody was concerned how= much smaller features on ICs could actually be pushed. I recall when the 64kb DRAMs first appeared and alpha particle hits were suddenly a critical issue - the doomsayers were claiming DRAM cells couldn't be shrunk any further. I suspect moving from CERDIP to plastic packages and adding suitable coatings to stop alpha particles helped. In any case, things have shrunk by about 5 orders of magnitude and no-one mentions alpha particles any more. --=20 Peter Jeremy --0OAP2g/MAC+5xKAE Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQJ8BAEBCgBmBQJV/PxXXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRFRUIyOTg2QzMwNjcxRTc0RTY1QzIyN0Ux NkE1OTdBMEU0QTIwQjM0AAoJEBall6Dkogs0ZE4QAIXRbIB03xeKKbjsiWNy/hkE Zr+9ZbKwZiuPq8cdxiIgjiYnZ/tt3kzhpJGRtbV5XkoX0mqmGedMG2alyVSrgASb m4egXlK1PLQzC6Wap2aeOfAE2kPd/YwCM6eSFBwjJnzYe2moJbjgensVzUlUOhGt bzATqtLkcg1w1UmH3OqSsUnCJMIr9W6cKSs3WhcWL242Tcs1nbrzg4WY8iM9VAOu MihibUbXtDqRpbg9gkZ74qmRydJdU2gESR4kPyQ5yfl69Xveo5KPZPpAkPXXGKqD TlWTdepamuoiyvRaZyAnLt0B5eIkndLBytFgH4XXRxnFDivMGfKbIHGY4wY6IQAE 52er5a703yee9UbmdtmNq257Q1TZQDyz+ejaft5qRj6/Utwe9mC9xXKkv+TMpBSU NthSfgbZ2fGYncohOfzLr/4ParrS2o9hDmrDqwrY0ywn6MTqNFlmlI3j7lTguEJ7 Dj8xrDB1EnXhs5AUUlcFKwDd1JNNESssXiPihVJiScGnbRWhK40as6Vx7qDQFIH6 kzePIK8PF1fahzxJIFSwZbQkTkUOGoU7fMVZN8CyaNiB0F9mqApvmbSPLabbvwJL UKESruon4iq7jv2LaST8D30y8b63ASnQ2xtnIj6MMyz/60/61mZbE5PLdnqbcx3U IZdCFi17hghOUtsw7FTa =GUNY -----END PGP SIGNATURE----- --0OAP2g/MAC+5xKAE--
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