Ren¨¦ Ferland wrote:
Fish wrote:
AFAIK all IBM operating systems do this
Except for MUSIC/SP, none of the vintage systems we have
implement handshaking.
Really? Wow. Maybe the ones we have were before VM's time?
If I am not mistaken, George Shedlock added handshaking to
DOS/VS R34,
REALLY?! Again, WOW. I specifically recall the option being there when I was working with DOS/VS(E) back in the day. I guess back then it was something new that IBM had just recently added? I mean, I can understand earlier versions not having it (not even IBM operating systems are psychic after all, being able to predict the future), but I would have thought that virtually all of their later versions would have had it.
and Bob Polmanter did so for MVS 3.8J. To my knowledge,
there is no handshaking in DOS/360, MVT, OS/VS1, and MTS.
A work around for these systems (when run under VM) is
to use dedicated printers (and punches), something easy
to do when VM runs under Hercules, maybe not that much
on a real system. :-)
Quite right. It's not possible to have *every* VM guest use the real printer at the same time. :)
Cheers,
Rene FERLAND, Montreal
P.S. -- From the manual "Introduction to DOS/VS Release 34"
we learn, on page 124, that handshaking was provided by a
licensed product called "Advanced Functions", which explains
why it is not in the operating system we get after a sysgen
from the tapes we have.
Ah yes! I forgot about AF. My bad. The version of DOS/VSE we had was a not-yet-released still-under-development pre-AF version of DOS/VSE. (Our president was a former IBM'er and managed to get a copy of DOS/VSE before AF was officially released.) I guess that's why we had it.
My bad.
But I hope my point was made: once the feature became available, it *was* eventually incorporated into virtually all subsequent releases/versions of IBM's most popular operating systems. Perhaps not ALL of them, but most of them I suspect. And given how easy it was to do too, I can't see why ALL of the older vintage IBM operating systems that are run on Hercules today wouldn't have it. It's such a very simple tiny change.
Anyway, don't mind me. Sorry to bother you all. Just passing through. I'll go away now and leave you guys alone. :)
--
"Fish" (David B. Trout)
Software Development Laboratories
mail: fish@...
