From: Enrico Weigelt <weigelt@metux.de>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Microcode update AMD
Date: Sat, 5 Feb 2011 14:34:36 +0100 [thread overview]
Message-ID: <20110205133436.GC2117@nibiru.local> (raw)
In-Reply-To: <4d3493c4.0297df0a.7fb2.ffffc8c0@mx.google.com>
* Volker Armin Hemmann <volkerarmin@googlemail.com> wrote:
> the CPU. All CPUs use microcode. For decades. Google, or go straight to
> wikipedia.
> http://en.wikipedia.org/wiki/Microcode
Borroughs' large systems (b6500+) were designed as microcode
machines from ground up, which essentially interpreted an algol
bytecode (the whole OS was directly implemented in assembler,
w/o any machine specific assembler code). Paired w/ their entirely
stack-based architecture (there were no program-visible registers)
they could easily do massive-multiprocessing (everything's reentrant
by design), 24/7 uptime even w/ hw replacements/upgrades and
cpu improvements w/o ever having to recompile.
Their successors (now Unisys) are called emode machines - quite
the same approach as nowadays w/ Java (interpreter/JIT).
BTW: I'm currently designing an emode/microcode-base computer
architecture built on an matrix of nanocores, they don't have a
concept of main memory, instead a relatively large (linear
addressable) register memory, part of the register space is
shared with neighbours (multiport-RAMs). These are programmed
by an horizontal microcode, which is decoded by an static demux,
that directly connects registers to an micro-ALU (so there're
no additional load+store cycles) ...
cu
--
----------------------------------------------------------------------
Enrico Weigelt, metux IT service -- http://www.metux.de/
phone: +49 36207 519931 email: weigelt@metux.de
mobile: +49 151 27565287 icq: 210169427 skype: nekrad666
----------------------------------------------------------------------
Embedded-Linux / Portierung / Opensource-QM / Verteilte Systeme
----------------------------------------------------------------------
next prev parent reply other threads:[~2011-02-05 13:44 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-17 17:21 [gentoo-user] Microcode update AMD meino.cramer
2011-01-17 18:10 ` BRM
2011-01-17 18:34 ` meino.cramer
2011-01-17 19:14 ` Volker Armin Hemmann
2011-01-17 18:48 ` Mark Knecht
2011-01-17 19:12 ` Volker Armin Hemmann
2011-01-20 0:53 ` [gentoo-user] " walt
2011-01-20 1:08 ` walt
2011-01-17 19:08 ` [gentoo-user] " Volker Armin Hemmann
2011-01-17 19:19 ` meino.cramer
2011-01-17 19:46 ` Volker Armin Hemmann
2011-01-17 19:57 ` meino.cramer
2011-01-17 20:12 ` Mark Knecht
2011-01-17 20:52 ` Volker Armin Hemmann
2011-01-18 4:29 ` William Kenworthy
2011-01-18 15:38 ` Paul Hartman
2011-01-18 16:16 ` Mark Knecht
2011-01-18 17:34 ` Mark Knecht
2011-01-18 17:48 ` Volker Armin Hemmann
2011-02-05 14:28 ` Enrico Weigelt
2011-02-05 15:26 ` meino.cramer
2011-02-05 17:07 ` Volker Armin Hemmann
2011-02-06 11:36 ` Volker Armin Hemmann
2011-01-18 17:55 ` Paul Hartman
2011-01-18 18:21 ` Mark Knecht
2011-01-18 20:42 ` Paul Hartman
2011-01-18 20:56 ` Mick
2011-01-18 21:13 ` Paul Hartman
2011-01-18 23:08 ` Mick
2011-01-18 23:56 ` Mark Knecht
2011-01-17 20:13 ` Jason Weisberger
2011-01-17 20:49 ` Volker Armin Hemmann
2011-01-17 21:59 ` Jason Weisberger
2011-01-17 23:27 ` Volker Armin Hemmann
2011-01-18 15:39 ` [gentoo-user] " Nuno J. Silva
2011-02-05 13:34 ` Enrico Weigelt [this message]
2011-02-05 16:15 ` [gentoo-user] " Florian Philipp
2011-01-18 16:27 ` Volker Armin Hemmann
2011-01-19 17:10 ` Volker Armin Hemmann
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