On Tue, 31 Jan 2017 12:41:10 +0000, Hardee, Chuck wrote:
>
>The manual states that on a call from a non-REXX environment, R0 must be zero.
> 
Why?

This is bizarre.  And sometimes hard to satisfy.  BPXWDYN ought to provide an
alternate entry point free of the requirement so users don't to need to write
wrappers to clear R0 and CALL BPXWDYN.

And if you don't LOAD/LINK/ATTACH BPXWDYN dynamically you risk missing
future updates.

-- gil

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