Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!sundc!pitstop!sun!decwrl!ucbvax!VIOLET.BERKELEY.EDU!mwm From: mwm@VIOLET.BERKELEY.EDU (Mike Meyer, My watch has windows) Newsgroups: comp.sys.amiga Subject: More stuff from info-68k (68882 and 68070) Message-ID: <8710302351.AA27916@violet.berkeley.edu> Date: Fri, 30-Oct-87 18:51:14 EST Article-I.D.: violet.8710302351.AA27916 Posted: Fri Oct 30 18:51:14 1987 Date-Received: Wed, 4-Nov-87 23:46:12 EST Sender: daemon@ucbvax.BERKELEY.EDU Lines: 42 First, it was noted (but I didn't forward the letter) that John Gilmore had missed an important detail on the 68070. Namely, that the clock cycles he was looking at were internal clock cycles, and that the internal clock runs at twice the frequency of the external clock. So those twice-the-cycle delays were actually the same length as the MC68K chips. In summary: All on chip: the 68070 is about twice the speed of the MC68Ks Off chip, no MMU: identical to the MC68Ks Off chip, with MMU: 50% more time than the MC68Ks (1/2 an external clock) Who's going to be the first person to try one in an Amiga? We also have data on the 68882 (for you FP freaks): ------- Forwarded From: tikal!amc!motsea@beaver.cs.washington.edu (Motorola Seattle ) Organization: Applied Microsystems Corp., Redmond, WA. Subject: Re: MC68030 & MC68882 now out and available; comparisons with MC68020? Message-Id: <542@amc.UUCP> References: <4733@elroy.Jpl.Nasa.Gov> Sender: info-68k-request@ucbvax.berkeley.edu To: info-68k@ucbvax.Berkeley.EDU The 68882 *** IS *** a drop in replacement for the 68881. By reconfiguring the internal architecture [primarily in floating point register access], it is able to achieve typically 50% better performance than an 881 [all other factors being equal], and can go 2x with minor code mods... ...mark konopacky fae motorola seattle email: ...uw-beaver!tikal!motsea!mark [I am fortunate to use Applied Microsystems' node for news...] << Standard Disclaimer >> ------- End of Forwarded Message So, anybody know how much of the code floating around for the 68881 will take advantage of the 68882 (sorta like Lattice 4.0 takes advantage of the 68010)? Dale?