On Sat, 11 Apr 2009 14:50:17 -0500, Joel C Ewing wrote:

>There are what looks like some very versatile z/OS macros to convert
>"readable" date-time values to and from TOD and ETOD values, which
>someone might be tempted to use as a basis for date-time manipulation.
>
>It is still a documented restriction (don't know if it is actually true)
>that even when ETOD values are used that dates handled by these macros
>must still fall within the 2042 limitation.
>
I tried STCKCONV with X'010000...'.  It gives 1900-01-01 (z/OS 1.7
and 1.10).

>  ...  This is an example of
>things that obviously need to change well in advance of when the actual
>ETOD overflow occurs into the high order byte, so that code can be
>written and tested using dates beyond 2042 well before 2042 arrives.
>
The format isn't set yet, AFAIK.  It's within IBM's prerogative to
make it a signed value to support dates before 1900.

Should we expect to see an extended clock comparator register, or
is that better handled in software, by windowing?

-- gil

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