Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!tut.cis.ohio-state.edu!pt.cs.cmu.edu!MATHOM.GANDALF.CS.CMU.EDU!lindsay
From: lindsay@MATHOM.GANDALF.CS.CMU.EDU (Donald Lindsay)
Newsgroups: comp.arch
Subject: ROM speed
Message-ID: <7937@pt.cs.cmu.edu>
Date: 12 Feb 90 00:43:09 GMT
Organization: Carnegie-Mellon University, CS/RI
Lines: 9


It's often said that microcoded machines have slower cycle times than
fully hardwired machines. It's sometimes said that this is due to
the access time of a mongoword of ROM.

Is this true? Does anyone have a modern figure for how big a ROM
can be before it's slower than (say) a five-ported register bank?
-- 
Don		D.C.Lindsay 	Carnegie Mellon Computer Science