Jeff wrote :

> Percentage wise there is very little shared code -- not due to lack
> of trying on our part.  Even many of the drivers cannot be highly
> leveraged due to MPE expecting a more robust driver than HP-UX does.
> HP-UX and MPE IO systems are getting closer these days, with, my
> understanding being, that over time HP-UX has evolved to an IO system
> that is now more similar to MPE's.  True we added PCI late in
> the game,
> but I am talking about the underlying IO architecture.
>
>  Jeff Vance, CSY

IIRC, most I/O code within MPE is in Pascal. I've been told that HP-UX has
been written in C. That drastically reduces the opportunities for
code-sharing. There's probably a significant amount of C code in MPE these
days (Apache, Internet services, Posix shell, and possibly others), but I'm
ready to bet there's none, or almost none, in the I/O system. I've never
seen PCI source, so I cannot tell for that more recent part.

Christian "knows Pascal, will travel" Lheureux

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