Even if the module was hit by a PTF, it's a lot easier to start with the 
optional source than with the microfiche.

for the code written in PL/S (nee BSL), the optional source has the generated 
assembler with the source PL/S as comments; I found that reasonably easy to 
work with even though I would rather have had a PL/S compiler.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Tony Harminc <t...@harminc.net>
Sent: Thursday, January 10, 2019 12:28 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Zowe?

On Tue, 8 Jan 2019 at 16:47, Seymour J Metz <sme...@gmu.edu> wrote:

> > was “open source” if you call fiche open source.
>
> There were optional source material tapes.

For the base it was not uncommon. But while PTF source was, in theory,
RPQable, in the real world no one had complete source matching the MVS
they were actually running at any given time.

And of course there's another argument to be had over whether source
in a language for which no compiler was generally available counts as
Open Source.

Tony H.

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