Re: Attn does not interrupt
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This is deeper than I thought.?
There are started tasks called VTAM and SNASOL but I haven't found out yet whether they are IBM-supplied or not.
So perhaps I shouldn't be surprised at different behaviour :-)
Thanks for all the advice.
Roops
On 2020-11-18 9:08 PM, Rupert Reynolds wrote:
> Attn could interrupt any TSO program
I think ATTN button functionality depends on having an SNA session.
If your TSO terminal is an MVS 3270 I/O device with its own device
address, then that is a non-SNA session and so ATTN does not function.?
PA1 will perform the TSO attention function - use RESET first to undo an
input-inhibited state first if necessary.
Given the limited number of I/O addresses and the growth of networks
over the years, as time went on a greater percentage of TSO connectivity
came under the SNA and SNA-like umbrella, with ATTN often working even
for modern TSO sessions over TCP/IP (depending on the TN3270 parameters
used for Communication Server).
When a 3270 terminal is an I/O device, ATTN may not be an AID-generating
key - or so I imagine, but I'm not really a network guy.
Cheers,
Greg
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