Everyone: The POPs contains the text below within the description of the STIDP instruction:
"When the format bit is zero, the contents of the CPU-identification-number field, in conjunction with the machine-type number, permit unique identification of the CPU." Now, I always thought that the text above was stating that the CPU serial number (6 chars, of which the rightmost four are useful) was 'guaranteed' to be unique across all CPUs manufactured by IBM for that machine-type number. However, I've found a case where two different customers of ours both have 2817 machine types and the same CPU serial number. Is this a nomenclature issue? One customer has a 2817-605, and the other has a 2817-704. Both boxes have the same CPU serial number. Is the 'machine-type number' mentioned in the POPs text above supposed to refer to the type plus sub-model, or just the type? I thought I understood this until I found this apparent duplicate CPU serial number case. -- Mike Shaw MVS/QuickRef Support Group Chicago-Soft, Ltd.
