You bet Ed. I learned things about diagnose that I never saw written
down from guys who were some of the original 360 65/67 support staff.
Doug
snip>>>>>
IBM also kept the
existence of the diagnose instruction hidden in obscure places
for many
years before innocently admitting that it existed and was pretty
powerful.
Diagnose was in every edition of Principles of Operation that I've
ever
seen. Or are you referring to documents from before the S/360
announcement?
I could be wrong but I think he is talking about the "undocumented"
"option codes" that a diagnose could *really* do.
Ed
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Doug Fuerst
Consultant
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