Registers at entry

When the MIPR receives control, the general purpose registers (GPRs) contain the following information:
GPR
Contents
0
Does not contain any information for use by the routine
1
Address of the CSVMODI data area
2 - 12
Does not contain any information for use by the routine
13
Address of a standard 72-byte save area
14
Return address to the CSVINFO service
15
Entry point address of MIPR