Register 1 Parameter List

Word 1: must be zero.
Word 2: contains an address of a pointer to the argument list SSGARGL (detailed below), which IDCSS01 requires. Within this argument list is a field named SSGOADR, which points to the buffer area in which IDCSS01 returns subsystem statistics, status, or counts information. The buffer area may be obtained by the caller or may be left for IDCSS01 to obtain.
Word 3: points to an area to receive a 2-byte binary return code. Possible return codes are listed at the end of SSGARGL. IDCSS01 also returns this return code in the low order bytes of register 15.