L64A0110@JHUVM.BITNET (Jim Jones) (09/26/90)
On Tue, 25 Sep 90 13:55:15 GMT you said: >In article <9009241831.AA26211@lilac.berkeley.edu> William Joyce 914-633-2646 > <JOYCE%IONAACAD.BITNET@lilac.berkeley.edu> writes: ... > ... VSE/VTAM supports Bisync communications and >:PASSTHRU can emulate a remote 3274 controller, but I don't know if I'm trying >:to do the impossible by attempting to have them communicate over a CTCA. ... >CTCA is one of the most common ways to run Passthru. In systems where >multiple OS's (like VM and MVS) share the CPU, a Virtual Channel to >Channel Adaptor is the preferred connection. ... Except that VM/Passthru won't talk to anything but another VM/Passthru via CTCA (or virtual CTCA). I'd love to hear someone tell me otherwise, but as far as I can tell you are "trying to do the impossible". The IBM response would seem to be: Just run VM/VTAM. A suggestion that I find quite repulsive... :-) >Dan Mercer >Reply-To: mercer@npdiss1.StPaul.NCR.COM (Dan Mercer) >"MAN - the only one word oxymoron in the English Language" -jj BTW -- That's why we have our VM/SP and MVS/SP guest operating systems talking to each other over a bisync link that goes out one 3705 line set, into a modem eliminator, and into another 3705 line set! In all fairness, the two 3705's used to be attached to different CPU's. But now that MVS and VM both run on one CPU under VM/XA, I'd really like to do something more reasonable. Which of course leaves out VM/VTAM. :-)
SPGMNF@CMSA.BERKELEY.EDU (Mike Friedman) (09/27/90)
I've forgotten the main gyst of the original request. But if you're trying to have terminal sessions between VM and MVS via CTCA (real or virtual), you might consider the SIMPASS/CTC product of Simware, Inc. That's what we use (and have been for about 4 years). SIMPASS/CTC runs as an MVS VTAM application and emulates a PVM node. No changes are required to the PVM side of the connection; PVM thinks it's talking to another PVM. Because this is PVM emulation, it is bidirectional, unlike PVM's 3x74 emulation. Terminal access on the MVS side is implemented as VTAM SLU's (Secondary Logical Units) emulating 3270's. I'm not sure this addresses the original question, but there it is for your information.