| Offsets | Name | Length | Format | Description | |
|---|---|---|---|---|---|
| 0 | 0 | SMF90TOP | 8 | binary | Time (in STCK format) of OPT change. STCK format is indicated on the TIME macro. |
| 8 | 8 | SMF90OPO | 8 | EBCDIC | Old OPT parmlib member. IEAOPTxx indicates no OPT. |
| 16 | 10 | SMF90OPN | 8 | EBCDIC | New OPT parmlib member. |