Re: Flame-o-Rama! (was Re: ZipGS 12MHz on

[jimwong@owlnet.rice.edu (Jim Wong)]

In article <1994Apr29.053354.1165@labtam.labtam.oz.au> philip@labtam.oz.au writes:
>back to the matter at hand, the 680x0 series requires several clock cycles
>just to fetch a value from memory i.e. it doesn't to my knowledge use any
>pipelining at all.  Hence it effectively runs four times slower at the same
>Mhz rating.  I'm not sure on the exact data for the 80x86 series, but it's
>probably similiar.

1) Recent models of the 680x0 line are in fact pipelined.
2) Memory is going to be a bottleneck for any processor running at a fast
   clock rate with slow DRAM.  The fact that a 680x0 require several
   cycles to access a memory location that isn't cached doesn't mean it isn't
   pipelined.
-- 
Jim Wong (jimwong@owlnet.rice.edu)