On 09/19/2018 11:30 AM, Cornelia Huck wrote: >> The CPC and HPID are used for problem diagnosis and allows IBM to identify >> control program information by answering the following questions: >> >> "What environment is this guest running in?" (CPNC) >> "What distribution is this guest running?" (CPVC) >> "What underlying host environment is this guest running on?" (HPID) > > Is there also a way for people-who-are-not-IBM to find out what these > values have been set to? :) (IOW, is that write-only from a Linux > perspective?) The name code is pre-defined (4==LINUX). The 7 byte version code is actually free to be defined by the operating system, and Collin has made a proposal. No idea if there are better ways to use the 7 byte.