Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!jarthur!uunet!visix!news
From: amanda@visix.com (Amanda Walker)
Newsgroups: comp.sys.mac.hardware
Subject: Re: 68EC030 and 68030
Message-ID: <1991May9.201939.24270@visix.com>
Date: 9 May 91 20:19:39 GMT
References: <91127.192459KPURCELL@LIVERPOOL.AC.UK>
Sender: news@visix.com
Organization: Visix Software Inc., Reston, VA
Lines: 21

KPURCELL@LIVERPOOL.AC.UK writes:

   Is the EC a "crippled" 030 (minus the onboard MMU)? Is it pin compatible
   with the 030?

Yes to both.

I haven't seen a data sheet yet, but I suspect that 68EC030 chips are made
from 68030 dies which have defects in only the MMU portion.  By trimming
out the defective MMU, they still have a perfectly good processor that is
better than an equivalent 68020, thus increasing the effective manufacturing
yield.

Pretty clever idea, actually.

--
Amanda Walker						      amanda@visix.com
Visix Software Inc.					...!uunet!visix!amanda
-- 
"We are continually faced with a series of great opportunities brilliantly
 disguised as insoluble problems."	--John W. Gardner