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djf
Beginner
Joined: 06 Feb 2007
Posts: 68
Topics: 27
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 Posted: Mon Mar 10, 2008 6:59 pm Post subject: STCK |
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This perhaps shoudln't be in the application programming section, but here goes.
We have an assembler program that does some limited job scheduling, by doing some time/date routines and waiting for ECB's to pop, etc.
It's been acting a bit funky and I have somewhat been led down the path that there might be changes in the last few years in the format of the data returned from the STCK macro.
Can anybody give me any more info on this?
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DaveyC
Moderator
Joined: 02 Dec 2002
Posts: 151
Topics: 3
Location: Perth, Western Australia
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| Posted: Tue Mar 11, 2008 4:07 am Post subject: |
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STCK is an instruction not a macro and it has not changed. That would break compatibility which is not something mainframes do!
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Dave Crayford |
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semigeezer
Supermod
Joined: 03 Jan 2003
Posts: 1014
Topics: 13
Location: Atlantis
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| Posted: Tue Mar 11, 2008 9:01 am Post subject: |
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There is a new STCKF (Store Clock Fast) instruction but the only difference is a lack of guarantee of uniqueness in the low order bits. If your code is really old, there may be a difference in the S/370 handling of one of the condition codes with z/Architecture on STCK. Format is the same
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