Some RISC AS/400s ran OS/400 V3R6 or V3R7.
Watch out how you throw arounds those "nevers", "alls", and
"nones".
Those words tend to bite people in the butt.
FWIW the AS/400 is essentially the follow-on to the
System/36, to the
point of having a highly-evolved software environment allowing S/36
applications to run un-modified on AS/400. Supposedly there is some
dotted-line relationship to S/38 as well, but I don't have any real
information about that.
The other way round, architecturally. AS/400 gained most from S/38 and
FS. The whole AS/400 family was designed to replace S/32, S/34, S/36, and
S/38.
William Donzelli
aw288(a)osfn.org