Authorized Assembler Services Guide - Chapter 25 "User-Written SVC
Routines" 


Rob Scott
Rocket Software, Inc
275 Grove Street
Newton, MA 02466
617-614-2305
[EMAIL PROTECTED]
http://www.rs.com/portfolio/mxi_g2

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Lindy Mayfield
Sent: 22 December 2006 08:06
To: [email protected]
Subject: Re: Question about SVC 109

Hi Peter,

Thanks very much for your answers.  Perhaps I should be more specific
about my questions:

What is the range of numbers for an SVC routine that is invoked by SVC
109 that are reserved for IBM use?

What is the entire range that can be user-written SVC routines that are
invoked by SVC 109?

Can a user-written SVC routine invoked by SVC 109 be a type-3 or type-4,
or is it only type-4?  

Surely, if there is a link to the docs that you can point me to where I
can read this, I'm happy to do the work myself. (-: I just didn't find
it (yet).

Happy Holy Days!
Lindy

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Peter Relson
Sent: Friday, December 22, 2006 2:50 PM
To: [email protected]
Subject: Re: Question about SVC 109

SVC 109 by itself might be said to consist of just a table which
identifies the extended SVC routines. That table is treated the same as
a type 2 SVC, being in the nucleus, and having its name formed by the
standard nucleus SVC convention of "IGC" concatenated to the decimal SVC
number.

The extended SVC routine that a user provides are expected to be in LPA
(which is part of the definition of a type 3 / type 4 SVC).

Peter Relson
z/OS Core Technology Design

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