Path: utzoo!attcan!uunet!cs.utexas.edu!rice!uw-beaver!uw-june!badger.cs.washington.edu!upton
From: upton@badger.cs.washington.edu (Michael Upton)
Newsgroups: comp.arch
Subject: Re: Multi-Ported Register File
Message-ID: <11426@june.cs.washington.edu>
Date: 13 Apr 90 15:09:59 GMT
References: <34153@shemp.CS.UCLA.EDU>
Sender: news@cs.washington.edu
Reply-To: upton@badger.cs.washington.edu.cs.washington.edu (Michael Upton)
Organization: University of Washington, Computer Science, Seattle
Lines: 10


In reguards to the design of multiported register files:
About 2 read ports is as many as can be used for standard cross-coupled
inverter ram cells. 
simultaneous reads on three or more ports to the same address results
in corrupting the data. The standard fix for this is to add another inverter
to the read side of the cross coupled inverters, thus decoupling the read
from the internal nodes of the ram cell.

Mike Upton