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Found another surprise this morning.
First off, I found some code late yesterday afternoon, Doug Handy's UDDS
demonstration program
http://archive.midrange.com/rpg400-l/199907/msg00462.html
that gave me an easy way to build an arbitrary 5250 data stream, and
send it to the terminal.
I adapted it to send a WSF:Query, for the sake of proof-of-concept. It
worked correctly with our emulator (Query is the only WSF we support),
on both our V6 box and our V4R4 box, and also worked correctly with the
IBM-supplied emulator in Lan Console. So far, so good.
Here comes the surprise.
When I tried it with a real terminal (a 3489), it blew up, with the OS
getting a "negative response," and terminating the program rather than
passing the negative response back to it (I still don't know how to send
a "negative response"), regarless of whether I ran it on the V4R4 bos to
which the terminal is connected, or in a Telnet session to the V6 box.
That tells me that the controller on the V4R4 box doesn't support "WSF:
Query."
But it also tells me that I'm on the right track with Doug Handy's UDDS
demonstration program, and should continue to refine the "Query" version
into something that provides a direct readout (instead of having to look
at the raw bytes in the debugger), and that I can also build a "Query
Station State" version, and that presumably, I can put those onto the
customer box, and find out what happens.
--
JHHL
midrange.com
