IBM System/360 System Programmer's Manual page 109

HOW TO USE THE TRACING ROUTINE
This chapter describes the function of
the tracing routine, and provides a
detailed description of the inforwation
made availatle ty the tracing routine.
Before reading this chapter, you should
be familiar with the information contained
in the prerequisite putlication.
PREREQUISITE PUBLICATION
The IBM System/360: Principles of Opera-
tion publication (Form A22-6821) ccntains
inforrration about the SIO instruction and
the I/O and SVC interruptions.
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