Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!husc6!cmcl2!rutgers!uwvax!geowhiz!scott From: scott@geowhiz.UUCP (Scott Kempf) Newsgroups: comp.sys.apple Subject: Re: Continuation of the Apple II line Message-ID: <586@geowhiz.UUCP> Date: Mon, 19-Oct-87 13:34:27 EDT Article-I.D.: geowhiz.586 Posted: Mon Oct 19 13:34:27 1987 Date-Received: Thu, 22-Oct-87 06:51:17 EDT References: <8VRXrly00XoDFAM08g@andrew.cmu.edu> <791@sdcc18.ucsd.EDU> Reply-To: scott@geowhiz.UUCP (Scott Kempf) Organization: UW Madison, Geology Dept. Lines: 32 Summary: Comparing Clock Speeds. In article <791@sdcc18.ucsd.EDU> cs162fed@sdcc18.ucsd.edu.UUCP (Grobbins) writes: >In article <8VRXrly00XoDFAM08g@andrew.cmu.edu> mw22+@andrew.cmu.edu (Michael Alan Wertheim) writes: >>Even Applesoft wouldn't be too bad running at 16 megahertz. [on a Mac II] > >Imagine Integer Basic... Do NOT compare clock speeds between different microprocessors. Doesn't work. Here is a fictional example: If the 45735 microprocessor has a clock speed of 5Mhz and the 9898 microprocessor has a clock speed of 9Mhz. If an instruction takes 10 clock cycles on the 9898, and only 4 on the 45735. Then the 45735 will execute the same insturction faster, although the clock speed is slower. Even if 45735 run an add instruction slower than the 9898, it still may be faster, since 45735 could be doing a 32 bit add while the 9898 may only be doing an 8 bit add. While I don't know about the 68xxx series (the MACs), I know that the 80xxx (IBMs) use more cycles to do operations than the 65xxx (IIs). So when someone compares your Apple's 1Mhz (2.6Mhz in //gs) to an IBM remember, that's not a far way to compare computers. (I regret to admit that IBMs are faster, but clock speed doesn't tell you that) Scott -- _______________________________________________________________________________ Scott Kempf Mother do you think they'll drop The Bomb? MAIL: 1302 Rutledge St., Madison, WI 53703 PHONE: (608) 255-6205 (home) UUCP: {seismo, topaz, harvard, ihnp4}!uwvax!geowhiz!scott ARPA: geowhiz!scott@spool.wisc.edu PHONE: (608) 262-6154 (work) BITNET: scott%geowhiz.uucp%spool.wisc.edu@wiscvm.bitnet