> -----Original Message-----
> From: IBM Mainframe Discussion List 
> [mailto:[EMAIL PROTECTED] On Behalf Of Craddock, Chris
> Sent: Wednesday, November 21, 2007 11:45 AM
> To: [email protected]
> Subject: Re: What is 'MVS-recognized' disablement?

<snip>

> 
> In reality it is likely that less and less of the OS has such 
> demanding
> requirements, but there is still a lot of old code around. 
> When you mix
> new code in with the implicit assumptions hidden inside the 
> 40 year-old
> code, it is no-doubt safer to err on the side of caution.
> 
> CC

Which engenders another curiosity question in me. How much of the
original OS/360 code still lurks in parts of z/OS? Likely not very much,
but maybe some of the original NIP I/O code? I wonder if it got upgraded
to use ECKD instead of CKD. Or it if just wasn't worth it. After all,
the only thing left that uses SCTR loading is the NUCLEUS.

<idling down for the long weekend - anticipating a coma from a self
induced tryptophan overdose tomorrow>

--
John McKown
Senior Systems Programmer
HealthMarkets
Keeping the Promise of Affordable Coverage
Administrative Services Group
Information Technology

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