z/OS MVS Using the Subsystem Interface
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Input Register Information

z/OS MVS Using the Subsystem Interface
SA38-0679-00

On entry to the function routine the general purpose registers contain:
Register
Contents
0
Address of the subsystem's SSCVT
1
Address of the SSOB control block
13
Address of a standard 18-word save area
14
Return address
15
Entry point address

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