Alpha CPUs, was Re: [rescue] i860 Success

Lionel Peterson lionel4287 at
Mon May 3 21:34:10 CDT 2004

> From: Phil Stracchino <alaric at>
> Date: 2004/05/04 Tue AM 02:28:12 GMT
> To: The Rescue List <rescue at>
> Subject: Re: Alpha CPUs, was Re: [rescue] i860 Success
> On Mon, May 03, 2004 at 06:55:25PM -0700, Francisco Javier Mesa-Martinez 
> > .... for Xenix, coherent or even sequent which were x86 based nixes.
> ...though Coherent was a pretty crippled *nix.  iirc, the Coherent
> kernel could address only a single 64k memory segment.
> Then again, Thompson & Ritchie's original Unix machine at Bell Labs only
> had 64k ....

Lack of network connectivity was a big drawback too, but back then the 
internet wasn't so mainstream... ;^) A later, 80486-based release (Coherent 
4.0?) had some built-in networking.

I think you're right about the 64K limit.

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