[ntp:questions] 500ppm - is it too small?

Joseph Gwinn joegwinn at comcast.net
Fri Nov 13 18:17:16 UTC 2009


In article <lak0t6-g6n.ln1 at klein-habertwedt.de>,
 Uwe Klein <uwe_klein_habertwedt at t-online.de> wrote:

> Joseph Gwinn wrote:
> > The prototypical example of an orthogonal instruction set was the 
> > PDP-11.  The Motorola 68000 family was an outgrowth.
> 
> 68k	-> CISC	and still very much alive
> 88k	-> RISC drifting belly up in the pond.
> 
> in ~1990 Motorola wanted to push RISC 88k so much
> you could buy a MVME187 plus SysVR3 unix System
> for half the price of a MVME167. Afaik it was a flop.

I remember the 88K.  Sort of.


> PowerPC later took off in an acceptable way.

Yes.  IBM uses the instruction set to this day in their large servers.

 
> Another side is a bit more interesting:
> Motorola had a perfect design for the 68k
> processor developement path at the time
> they released the inital MC68000.
> Things just worked.

Yes.  I did a fair bit of 680x0 programming over the years.  The 680x0 
still lives, having become a tiny little embedded computer chip for use 
in appliance controllers and the like.

Joe Gwinn




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