In <[EMAIL PROTECTED]>,
on 12/21/2006
at 09:13 PM, Lindy Mayfield <[EMAIL PROTECTED]> said:
>Can someone please tell me if I have gotten this right? (:
>SVC 109 is basically an SVC that can call an SVC from 0 to 255,
It's an extended SVC router (ESR); the routines that it calls are
logically part of the ESR rather than SVC routines in their own right.
>SVC's called by SVS 109 can only be type-4 SVC's.
They can 't be SVCs at all.
>Why not type-3?
The ESR routines aren't type anything.
>Nowdays, I cannot see any differences between type-3 and type-4.
Back in OS/360 days the difference was only documentation, not
functional. A type 3, or even a type 2, SVC could do an XCTL and it
would work just fine.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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