Re: Rollover

At 10:17 AM 8/24/99 -0400, Dan Bale wrote:
>
>>The AS/400 system date counter as I understand it will rollover thru
>>000000 as we pass thru midnight 12-31-99. I suspect this is good news.
>Of course, you know better than that! On Y2K OS/400's (at least), the system
>date will never see 000000, but will go from 12/31/1999 to 01/01/2000.
>
>>In much the same manner the GPS system rolled thru 0000 weekend as it
>>counted past 1024 weeks this week end. The only reports of problems so
>>far, were a few hundred active car navigation systems,in Japan, during the
>>transition.
>Again, no comparison to OS/400!
>
>However, was I the only one who thought it unusual the shortsightedness of
>whoever designed the GPS system to count only 1024 weeks? Add one more 8-bit
>byte, and you rollover once every 315 years!
>
>Just wondering.
>
>- Dan Bale
>
Dear Wondering:
While I respect your opinion here are some facts.

- about how the 400 handles system dating.
It is not meant to be a math test

As I remember it the AS/400 system date is
internally tracked in units of 1024 microseconds
since August 23, 1980 12:02:06:315

This is the basis for the comparison


Regards,



Glenn
Ph. (718)898-9805
mailto:Glenn-Ericson@att.net
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