Register Contents

Table 1 gives the contents of the registers when VSAM exits to the SYNAD routine.

Table 1. Contents of registers at entry to SYNAD exit routine
Register	Contents
0	Unpredictable.
1	Address of the RPL that contains a feedback return code and the address of a message area, if any. If you issued a request macro, the RPL is the one pointed to by the macro. If you issued an OPEN, CLOSE, or cause an end-of-volume to be done, the RPL was built by VSAM to process an internal request. Register 1 must contain this address if the SYNAD routine returns to VSAM.
2-13	Unpredictable. Register 13, by convention, contains the address of your processing program's 72-byte save area, which must not be used by the SYNAD routine if it returns control to VSAM.
14	Return address to VSAM.
15	Entry address to the SYNAD routine.