by Robert Sample » Fri Oct 29, 2010 5:18 pm
I think the key question is why are you not talking to your coworkers about this? They would know the details of how your site is set up far, far better than we ever will.
Broadly speaking, there is a TSOPROC data set somewhere on your system. The specific name is site-dependent. When you log onto TSO, the TSOPROC (which is JCL) is executed to establish the initial environment. There is a SYSPROC DD statement in the TSOPROC which points to a command library and a parameter of the JCL indicates which member of the PDS to use. Those commands are executed, and at some point panel ISR@PRIM will be invoked to bring up your ISPF primary menu. If your site uses RACF, the TSOPROC has its own FACILITY so it can be protected independently of other resources. There's a number of different ways things can be set up -- for example, having a preliminary menu of TSO functions before the ISPF primary screen -- so only by looking at your site (or talking to your coworkers) can you know for sure how it is set up.