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From: lindblad@cc.helsinki.fi
Newsgroups: comp.sys.amiga.hardware
Subject: re: RISC Amiga
Message-ID: <3866.2730b88b@cc.helsinki.fi>
Date: 2 Nov 90 00:06:35 GMT
References: <1156@iceman.jcu.oz> <1990Oct30.173846.6928@idt.unit.no> <1990Oct31.012758.26467@jarvis.csri.toronto.edu>
Organization: University of Helsinki
Lines: 19

> to get the 'cycles per (useful) instruction' as close to 1.0 as possible!
> In fact, the R3000 achieves 1.27 clocks/SPEC integer.  You can be sure this
> is better than what the 68040 (certainly the FASTEST of the 68K line) can
> achieve, because Motorola's predicted performance for the 68040 isn't evenb

Current beta (or something like that) versions of 68040 do one istruction
1.3 cycles. And it's instruction set is optimized in a way that mostly used
istructions are fastest. Difference between 1.27 and 1.3 is not worth
mentioning.
	Today there are already 30-40 MHz versions of RISC chips. Well, I think
that within months there will be something like 50 or 60 MHz versions of
68040., as there are alredy 50 MHz 68030s and 60 MHz 68882s producted.
	I don't think that it would be worth putting RISC chips on Amiga as
CPUs, simply because of differences in instruction sets of 68000-series and
RISC processors. But in future, there will propably be some special purpose
RISC chips on Amiga (like Intels i860 (I hope that VLIW-processor was i860)).
	In few years RISC chips go far ahead 040 and then in about three years
there will be 68050 and it equals the speeds, and then RISCs go ahead again.
But still most computers to be sold will be CISC computers. For now.