I have a OS/VS2 Debugging Handbook, Second Edition, 1978 and it says RESERVED.
Maybe at some point between then and now it was documented.
On my system SVC 50 points to a IEFBR14 sequence. If somehow you could get to
+4, it does a few instructions and issues an SVC 13.
I think it is best to still think of it as reserved. Here is the code.
1BFF07FE 0D904110
00F88910 00148810 000858F0 91824100
00848900 00181610 0A0D0000 00000000
Chris Blaicher
Technical Architect
Mainframe Development
Syncsort Incorporated
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-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Steve Thompson
Sent: Thursday, July 7, 2016 8:54 AM
To: [email protected]
Subject: Looking for an answer to an SVC question
I am looking for an old Field Engineers Handbook entry on SVCs.
SVC 50 used to be documented there (and as I recall, it doesn't say much, but
what it does say is important).
I'd like to know what is found in one of those books. I don't have, available
to me now, anything prior to z/OS 1.1. And I think it was also documented in
the MVS/XA Diagnosis Ref. (or what ever it was called in those days), but the
current books just say reserved.
Regards,
Steve Thompson
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