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To: Ali Chen who wrote (55538)9/27/2000 6:06:21 PM
From: Bilow  Respond to of 93625
 
Hi Ali Chen; Re doubling /quadrupling RSL channels...

The way to do it would be to do some or all of the following:

(1) Change RDRAM chip design so that instead of 18 data pins, it has 36. That way, you don't have to route extra copies of the address bus around. That would save something like 26 pins per RSL.

(2) Get rid of the concept of the RSL channel having more than one RIMM. That way, you get rid of all the outgoing signals. That would save all the outgoing RSL channels. (And also get rid of the continuation modules.) But you would have to populate every DRIMM (tm) socket.

The result: You could fit a quadruple RSL RIMM into somewhere around a 350 pin connector. Or a double RSL channel into around 200 pins. You would still be able to ground every other pin.

This would be a sort of natural design. The consumer wouldn't be able to add memory to his system as conveniently, but I think that option is going to go away regardless.

-- Carl