KA620 or KA630 [...]
In case anyone cares: the difference between the KA620 and the KA630
(well, the technical difference, at least) is that on the KA630, P0 and
P1 page tables live in system virtual space, as on most VAXen; on the
KA620, P0 and P1 page tables live in physical space.
I once wrote a (micro)kernel to run on a KA620....
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