PDP-11 data and function address spaces (was External ptrs and arrays)

[Mike SchillingThis sentence no verb.]

>From article <1989Nov9.200332.8763 at utzoo.uucp>, by henry at utzoo.uucp (Henry Spencer):
> Dept. Of Really Fussy Nit-Picking:  relatively few pdp11s, and relatively
> few pdp11 operating systems, supported split-space -- Unix on the 44/45/70
> was just about the sole example [...]

Not to mention a REAL operating system, RSX11M-plus.  Also, all the J-11
machines, 11/73/83/84 (53?), have separate I&D space.