On Wed, 15 Nov 2023 12:06:48 -0600, Charles Mills wrote:
>@Peter, I went around on the R0 question here a couple of years ago.
>
CMSThink: Since no one uses R0, it's OK for everyone to use it.
And the developers who ported REXX to TSO were too unaware to spot
the problem and fix it. Or perhaps a misguided fixation on "portability"!
In the REXX Ref. I see:
Register 0
Address of an environment block (optional)
"optional" should never be specified as a register content. I read that as:
Address of an environment block (if not, it doesn't matter)
--
gil
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