On Fri, 30 Nov 2007 08:43:38 -0600, McKown, John wrote:
>
>> It has also been mentioned a couple times in this thread that the
>> z/OS operator's 327x console is free of the half-duplex constraint:
>> the operator never needs to press ATTN before entering a command.
>>
>> I'd be delighted to see an alternative implementation of OMVS that
>> bypasses TSO (or is VTAM the culprit?) and passes 327x data streams
>> more directly to the terminal.
>
>Can't be VTAM. Using SMCS, you can now run a true z/OS console on a VTAM
>3270 LU. Works identically to a DIDOCS 3270 console. We now use them for
>some Production Control people who are remote to the data center, but
>need to have a console around to see messages "real time". TN3270E to
>VTAM to SMCS for a console. Works well with all three of our TN3270
>terminal emulators (Hummingbird, BlueZone, and Rumba).
>
As an experiment, I composed the EXEC on VM/CMS:
/* Rexx */
signal on novalue
address 'COMMAND'
do forever
say date() time()
do while externals()>0
parse pull Line
say Line; end
'PIPE literal +10 | delay'; end
... then from an ISPF session, I "TSO TELNET VMCMS" in 3270 mode.
It mostly works; I can type ahead for 10 seconds, and the input
typed ahead comes out in the pull...say loop. But it stutters;
some characters are repeated; it seems that I can type characters
after I press ENTER but before the cursor is placed at the left
end of the input area. I wonder whether TELNET plays the same
invisible polling game as OMVS? Now I must try it from a linemode
z/OS Unix session, if only to see how externals() behaves under Unix.
About SMCS being unavailable during IPL, haven't I seen some
discussion here of a remote HMC? Would that suffice? Or are
there operator commands that can't be issued at the HMC?
And more on your perplexity about my suggestion of "background
initiated foreground": I've seen some sentiment here that a
class of users prefer linemode for general Unix operations, but
OEDIT/OBROWSE in their specialty areas. Wouldn't it be at least
convenient in a linemode z/OS Unix session to issue:
DISPLAY=local.desktop export DISPLAY
oedit some.file
... and have a new, genuine x3270 window running ISPF/PDF pop
up on one's desktop? No need to enter user ID and password;
current working directory and environment inherited from the
Unix session; and if the user has issued a "su" command, OEDIT
would run with the new user ID, not that of the original TSO
session as is the present (mis-)behavior of OEDIT under OMVS.
-- gil
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