Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!gatech!bloom-beacon!husc6!mit-eddie!ll-xn!ames!amdcad!decwrl!exodus.dec.com!harrow From: harrow@exodus.dec.com (Jeff Harrow, NCSE BXB1-2/E02 DTN=293-5128) Newsgroups: comp.sys.mac Subject: Mac II and SANE... Message-ID: <10882@decwrl.DEC.COM> Date: Wed, 15-Jul-87 10:57:12 EDT Article-I.D.: decwrl.10882 Posted: Wed Jul 15 10:57:12 1987 Date-Received: Fri, 17-Jul-87 06:09:57 EDT Sender: daemon@decwrl.DEC.COM Organization: Digital Equipment Corporation Lines: 31 I've been running some benchmarks (programs to be posted in a few days) on my Mac II with some interesting results. Floating point math seems to be about 6 times faster on the Mac II than on the Mac Plus, which is essentally the speedup anticipated between the 68000 and the 68020. However, this does NOT seem to indicate that the 68881 co-processor is getting into the act. These benchmarks do their math via SANE, and I had been led to believe that System 4.1 would patch SANE to utilize the 68881 if it was there, thereby providing a significant increase in the math speed, yet these benchmark results don't seem to confirm this. Conversly, the same benchmarks run DRAMATICALLY faster on an HD2000, which DOES directly utilize the 68881, yielding more fuel to the assumption that the Mac II's SANE is NOT doing so. Apple: Does System 4.1's SANE on the Mac II utilize the 68881? Jeff Harrow Work address: ARPAnet: HARROW%EXODUS.DEC@decwrl.ARPA Usenet: decwrl!exodus.dec.com!harrow or {allegra,Shasta,decvax}!decwrl!dec-rhea!dec-exodus!harrow Easynet: EXODUS::HARROW Telephone: (617)264-5128 USPS: Digital Equipment Corp. Mail stop: BXB1-2/E02 85 Swanson Road Boxboro, MA 01719