Re: Pure 64 bootloaders

From: Kyle Moffett (mrmacman_g4_at_mac.com)
Date: 09/14/05

  • Next message: Roland Dreier: "[PATCH] add PCI IDs so RME32 and RME96 drivers build" 
    Date:	Tue, 13 Sep 2005 23:44:55 -0400
To: Joe Bob Spamtest <joebob@spamtest.viacore.net>

    On Sep 13, 2005, at 13:00:16, Joe Bob Spamtest wrote:
    >> Is the alpha also pure 64bit?
    >
    > Alpha was designed 64-bit from the start. DEC did a lot of neat
    > things with the design of that processor -- it's a shame it went
    > the way of the dodo when ia64 was proposed.

    PowerPC was designed 64-bit from the start too! It's just that the
    architecture design group also realized that there would be a demand
    for 32-bit CPUs, and so from the _64-bit_ system, they designed a 32-
    bit system whose entire instruction set would be forward-compatible
    to 64-bit systems when they came out. That's why 32-bit PowerPC
    machine code and 64-bit PowerPC machine code are completely identical
    except that 64-bit CPUs also have a few opcodes to process 64-bit
    data and a few extra kernel-mode registers.

    Cheers,
    Kyle Moffett 

    --
I lost interest in "blade servers" when I found they didn't throw  
knives at people who weren't supposed to be in your machine room.
   -- Anthony de Boer
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