Chapter 7. Software support 239
STSI: Store System Information instruction
The STSI instruction returns the processor model as a 16-byte character field rather than
the 1-byte hexadecimal version code field returned by the STIDP instruction. It also
returns the same processor type and serial number information that is returned by the
STIDP instruction.
The STSI instruction always returns the latest processor model information, including
information about the new processor model after a dynamic model upgrade has occurred.
This is the key to the functioning of CUoD, CIU and CBU.
After a concurrent upgrade, the channel CPC Node-Descriptor (NED) information is not
updated until after a processor POR.
Additional planning is required in a multisyst ...