Formerly About Advanced Micro Devices Message Board

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Politics : Formerly About Advanced Micro Devices

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To: Daniel Schuh who wrote (94298)	2/20/2000 12:56:00 AM
From: Scumbria	Read Replies (1) of 1576346

Dan, do you know anything about self timed logic? I think it's considerably more complicated to design than clocked logic, but it's been used for computers in the (well, really distant) past I think. From the little I know, it's sort of cool, things go as fast as they can go. Is "clock skew" a speed of light thing, or do you start seeing transmission line effects? Maybe the chips Most processors use some self timed logic, where data is sampled based on some local timing rather than a global clock. TLBs are a good example of this. It would be a daunting task to build a completely asynchronous processor however. IBM attempted this about 5 years ago in a PPC design, and discovered that the tool support was inadequate to verify it. Scumbria

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