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To: Joe NYC who wrote (112746)10/7/2000 5:37:25 PM
From: Elmer  Read Replies (1) | Respond to of 186894
 
Re: "Athlon supports 43 bit address"

Are you saying Athlon has 43 address bits externally? A42:A4? (byte enables control the bottom 4 bits).

EP



To: Joe NYC who wrote (112746)10/8/2000 1:21:53 AM
From: Tenchusatsu  Read Replies (2) | Respond to of 186894
 
Joe, <If there is a need for more, Athlon supports 43 bit address.>

Xeon already supports a 36-bit address bus, meaning it has a 64 GB address space. How the extra 4 bits are supported, I'm not exactly sure, but I guess it's kind of a hokey way. (Address segmentation, anyone?) I'd also guess that Athlon's 43-bit address space is also implemented in a hokey way, which is why real 64-bit processing is necessary (either IA-64 or x86-64).

Tenchusatsu


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