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From: PERSHNG@YKTVMH3.BITNET ("John A. Pershing Jr.  784-7167", 914)
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Date: 18 Mar 91 15:19:19 GMT
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The CMS SVCs are more-or-less documented in "CMS Application Program
Development Guide", SC23-0355, and "...Reference", SC23-0402.  Note,
though, that SVC 203 is considered to be an "internal" interface, and
should only be accessed via the appropriate macros.

The OS (and DOS) Simulation SVCs are probably only documented in the
code itself, although they mostly comply with the documentation that is
found in the appropriate MVS (and VSE) manuals.  There are a few words
concerning these SVCs in the above-mentioned manuals.

The DIAG codes that are available under VM/XA are documented in "CP
Programming Services", SC23-0370.

      John Pershing
      IBM Research, Yorktown Heights