Register contents

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

Table 1. Contents of registers at entry to JRNAD exit routine. Contents of registers at entry to JRNAD exit routine
Register	Contents
0	Byte 0—the subpool-id token created by a BLDVRP request. Bytes 2 - 3—the relative buffer number, that is, the buffer array index within a buffer pool.
1	Address of a parameter list built by VSAM.
2-3	Unpredictable.
4	Address of buffer control block (BUFC).
5-13	Unpredictable.
14	Return address to VSAM.
15	Entry address to the JRNAD routine.