According to zOS MVS System Commands manual....
4. The last character (character 8 of the LOAD parameter) specifies the
alternate
nucleus identifier (0-9). Use this character at the system programmer's
direction.
If you do not specify an alternate nucleus identifier, the system loads the
standard (or primary) nucleus (IEANUC01) and an architectural extension of
the nucleus (IEANUC11 or IEANUC21), unless the NUCLEUS statement is
specified in the LOADxx member.
Unfortunately they do NOT give an example. In my case I have
inherited an HMC with VVVV00T1 as its value. I understand the first 7
chars, but does the "1" mean IEANUC01 11, 21, or what?
Fortunately "T" turns on Informational messages and I see in the syslog
"IEA091I NUCLEUS 1 SELECTED" and the message is actually useful (for once)
and says that IEANUC01 was selected. I would think that they would just put
that in the syslog message, but that would be too easy.
My concern is what about the "architctural extension"? I doubt that I
would ever want to change this value, but I would like to know just in case
I do someday. I think the manual should just SAY "1" is the default and
corresponds to IEANUC01 IEANUC11 IEANUC21 and so on. "2" would be IEANUC02
and so on. I think this is the case but would like verification. And an
update to the manual.
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