Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site ucbvax.UUCP Path: utzoo!linus!decvax!tektronix!ucbcad!ucbvax!fair From: fair@ucbvax.UUCP Newsgroups: net.micro,net.works Subject: Re: faster disk, UNIX(tm), for Lisa Message-ID: <256@ucbvax.UUCP> Date: Fri, 29-Jul-83 02:43:30 EDT Article-I.D.: ucbvax.256 Posted: Fri Jul 29 02:43:30 1983 Date-Received: Sat, 23-Jul-83 22:12:48 EDT References: <1798@utcsrgv.UUCP> Organization: U. C. Berkeley Computer Science Lines: 11 Part of the problem with the Lisa's "profile" disk sub-system is that it doesn't do DMA, in spite of the existence of interfaces for that somewhere in the back of the thing. I remember this from a talk that Scott Bryan of UniSoft gave at Uni-Ops in January (February?) in Palo Alto, CA. Scott did UniSoft's port of UNIX to the Lisa. As for a faster UNIX, part of the problem there is the fancy graphics screen it uses. The 68000 loses cycles scrolling it. That's why it's only 5 MHZ. Erik E. Fair ucbvax!fair fair@ucb-arpa {ucbvax,amd70,zehntel}!dual!fair Dual Systems Corporation