Path: utzoo!attcan!uunet!wuarchive!zaphod.mps.ohio-state.edu!mips!troi!peter From: peter@dbaccess.com (Peter A. Castro) Newsgroups: comp.sys.amiga.hardware Subject: Re: RISC Amiga Message-ID: <885@troi.dbaccess.com> Date: 5 Nov 90 22:01:24 GMT References: <90306.212717AXN100@psuvm.psu.edu> Organization: DB Access Inc., Santa Clara, CA Lines: 28 in article <90306.212717AXN100@psuvm.psu.edu>, AXN100@psuvm.psu.edu says: + + + Just to add my $0.02 worth wouldn't any Risc Amiga have to have all of + the custom chips to do graphic sound etc., and wouldn't this make emulation + of a "regular" amiga possible? Just to add $0.02 to your $0.02, the 68040 as an optimization of the most used instructions to be approximately 1.3 cycles per instruction. Most RISC processors have optimizations that cycles per instruction approaches 1.0. Being that RISC processors would have to do "interpretation" of 68000 code in order to simulate the execution, it is very doubtful that any RISC processor, running at the same speed, could "emulate" the 68040. The best the RISC processor could achieve would be "simulation" and at a reduced equivalent speed. You could argue that the RISC chip be run at a faster speed, but why not just run the 040 at a fast speed as well? Remember that the A3000 has a 68030 with the envisionment that a 68040 board will be added to it (upgrade?). On another note, why not look at the MISC (Minimal Instr. Set Computer) architecture, which purports to be able to load different emulation sets to approach emulation speeds of various processors (Latest UnixWorld, I think). Imagine, stick a disk in, boot up, and *pow* run your favorite processor/machine emulation on your Amiga. Boy, wouldn't that be neat! -- Peter A. Castro INTERNET: peter@dbaccess.com // //| c/o DB Access Inc. UUCP: {uunet,mips}!troi!peter // //|| 2900 Gordon Avenue, Suite 101 FAX: (408) 735-0328 \\ // //-||- Santa Clara, CA 95051-0718 TEL: (408) 735-7545 \// // ||