On 1/24/24 13:14, Fish Fish wrote:
Eddy Balem wrote:
Just one minor point,you don't need to rebuild the DOS or
DOS/VS supervisor to add devices. You can use Add and Del
statements at ipl time, subject to the limit specified in
the original build.
I was going to mention that too, BUT... It's a lot easier to simply add the new devices to the supervisor (and then shutdown and re-ipl the new supervisor) than it is to have to manually type an 'add' statement each time you IPL. When it comes to DOS/VS, automation is a good thing.
(And before you mention it, yes I know you could also add such statements to a card deck and submit it to the card reader during IPL, but again it's much easier IMO to simply enter the command 'set' (with no arguments) followed by the command 'dpd' (followed by no arguments) during IPL than it is to type a command that submits a card deck to the card reader. But that's just my personal opinion of course. Each person is different.
I also like the fact that by having all of your devices defined in the supervisor that it's all self documenting and all in one place too. It's similar to having one Hercules configuration file with everything need you need in it versus having multiple separate parts spread across multiple file via include statements. Less parts equals less likelihood of mistakes, smoother automation and easier debugging should something go wrong.
But again, that's just my opinion.
Your mileage may vary as they say. :)
I vaguely remember this, but at the shops I worked at, it was never used.? The Supervisor was updated.? For all of the reasons Fish gave.? Sorry for my incomplete memory.
Admittedly, in a single user, DOS/VS system, using the at IPL time method would not be that big of a deal, but even then I suspect one would get tired of manually typing stuff at each IPL. I know I do.
Harold Grovesteen
