> Once again Unix actually used this, the DEC OSes did not, so Unix was the
first to
> find the bugs in this hardware too.

I think the first sentence is not true. The RT-11 XM monitor uses the MMU
hardware
intensively even before Unix came to utilize it. I'm not talking about
RSX-11, RSTS-E and 
Sherrard's TSX-Plus which were native real multiuser's muliprocessors OS's
for PDP-11.

Igor.

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