Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!nosc!ucsd!sdcc6!sdcc3!ma179aav From: ma179aav@sdcc3.ucsd.EDU (Stephen Hartford) Newsgroups: comp.sys.amiga Subject: CSA '20 slower than normal (was Re: AT Bridgeboard, '020 Status?) Message-ID: <4222@sdcc3.ucsd.EDU> Date: 6 Jun 88 15:55:03 GMT References: <9552@g.ms.uky.edu> <4362@killer.UUCP> Reply-To: ma179aav@sdcc3.ucsd.edu.UUCP (Stephen Hartford) Organization: University of California, San Diego Lines: 17 In article <4362@killer.UUCP> elg@killer.UUCP (Eric Green) writes: >On related topics, has anybody else had a CSA 68020 board for their A-2000 >that made the computer SLOWER than just a plain A-2000? Sure, the one he had, >had no 32-bit RAM. But still, it shouldn't have been SLOWER than a plain >68000, especially considering that most instructions complete in fewer >cycles. The way the guys from CSA explained it when they were at our SDAUG meeting was that the '20 must make more memory fetches than a normal 68000 would. Apparently, in some cases, the slower memory fetches more than negated the faster instructions. So, to really take advantage of the '20, you need the 32-bit RAM. -- Stephen Hartford shartford@ucsd.edu FAUG has the numbers, BADGE has the talent, but we have Monty! San Diego Amiga Users Group, P.O. Box 80186, San Diego, CA 92138-0186