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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