Register 15 Address of 8-byte COBOL program name in EBCDIC
Register 0 If bits 24-31 = 0, then bits 0-23 = parameter count.
- If bits 24-31 = x'80', then find last parameter with high bit on and set r0 to number of parameters found.
- If bits 24-31 = x'40', then process IMS parameters as follows: If first parameter <= F'18' then set r0 to value in first parameter + 1 else if first parameter > F'18' then find last parameter with high bit on and set r0 to number of parameters found.
Register 1 Address of list of addresses of parameters being passed
