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
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.