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>And is it possible to
>extend that into the program's executable code? 

Generally speaking, no. Data pages and program pages are well defined
from eachother. I would imagine you'd simply get a mrmory fault if you
attempted to change a code page.

>Can you move data to a
>procedure pointer?

And keep the pointer valid? Not sure, don't think so. Then again, I have
heard of someone running PPC machine instructions out of a user space,
so at that point it gets really interesting.

>Including OS400 itself?  Using just HLL programs?  Isn't Leif's book
mostly
>about MI?

Sure you can mod OS400 data -- but be careful! Changing the global SEPT
is an example. Since most MI opcodes can be accessed from RPG I would
think you might be able to do it in RPG, however, why don't you consider
MI an HLL?

-Walden

------------
Walden H Leverich III
Tech Software
(516) 627-3800 x11
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)



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