Any compatibility issues between Pyramid systems?

[Karl Kleinpaste]

tim at brspyr1.BRS.Com writes:
   Does anyone know if there are any compatibility issues between Pyramid
   models?

For what it's worth, we run one each of 90x, 98xe, 98x, and 9825, and
have no qualms at all about moving software among them.  In fact, when
installing the 9825, I simply restored dump tapes from the 90x, which
was the first to go to 4.4.

--karl