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From: ranger@ecsvax.UUCP (Rick N. Fincher)
Newsgroups: net.micro.apple
Subject: Re: Re: InCider's comments on the new //GS
Message-ID: <2116@ecsvax.UUCP>
Date: Thu, 9-Oct-86 12:46:50 EDT
Article-I.D.: ecsvax.2116
Posted: Thu Oct  9 12:46:50 1986
Date-Received: Sat, 11-Oct-86 19:33:18 EDT
References: <2092@ecsvax.UUCP> <844@cbmvax.cbmvax.cbm.UUCP>
Organization: UNC Educational Computing Service
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> The '816 isn't that fast, and its hardly RISC.  One of the basic RISC
> philosophies is to have a single set of instructions that read and write
> memory, while everything else is a register-to-register instruction.
> This lets things happen inside, very quickly.  This also requires a large
> number of registers (the Berkely RISC has near 200, as I recall).  The
> '816 still has just on general purpose register, and lets nearly every
> instruction access memory.  And it has to access memory 8 bits at a time,
> while the 68000 can touch 16 at a time.  The '816 is also missing more
> sophisticated instructions, like multiplies.  Its certainly an advance 
> over the 6502, but it compares much more closely to the 8088.

CLOSE to RISC.  The RISC-like features are: hardwired for speed, lots
of piplining and many 1 cycle operations.  Although the 68000 can work
on 16 bits at a time it takes 4 cycles to do it. The '816 can load or
store 16 bits in 2 cycles.  Not to put down the 68000 however because
it is a clearly superior chip.  Comparisons to the 8088 are more apt
(and more fun!), the 65816 is a clear winner here, but there is all
of that 8088 software out there.....
> 
> > Rick Fincher
> > 
> > Ranger@ecsvax
> -- 
> ============================================================================
> Dave Haynie    {caip,ihnp4,allegra,seismo}!cbmvax!daveh
> 
> 	These opinions are my own, though if you try them out, and decide
> 	that you really like them, a small donation would be appreciated.