Re: Weird IIgs Rom 01 bug

["Jayson Smith" <ihatespamratguynospamplease@insightbb.spamsucks.com>]

Wow, I just came upon this old message I posted years ago. I just tested 
this on my ROM 3, and the same thing holds. But have no fear! If there are 
still any Apple IIgs's in the hands of collectors ticking away in the year 
2040, you can keep the clocks right! Just set them back twenty-eight years, 
to 2012. The year won't be right, but everything else, including weekdays 
and leap year information, will. And, if there are still any IIgs's ticking 
away in 2068 when those that got set back once before would again hit the 
2040 rollover, just set them back to 2012 again! It's not quite that easy in 
2096, because 2100 isn't a leap year.
Jayson

"Jayson Smith" <nospamratguyspambegone@nospamplease.bellsouth.ihatespam.net> 
wrote in message news:...
> Hi,
> I've been playing around with a program I have which lets blind people
> adjust control panel settings without having to go into the desk 
> accessory.
> I was fiddling around with the clock section, doing some peeking, poking 
> and
> setting of the clock and found some very weird behavior so I wrote a clock
> print/set program to discover exactly what happens.
> It seems that at least on the Rom 01 GS, at exactly 06:28:16 on 02/06/2040
> the time becomes 00:00:00 on 01/01/1904.  This happens no matter if you 
> set
> the clock to a date/time past that mark or if you set it a few seconds
> before and let it pass that time naturally.  Quite literally, one second
> it's 06:28:15 on 02/06/2040 and the next second it's 00:00:00 on 
> 01/01/1904.
> I think this might happen once or twice more between then and the year 
> 2155,
> the highest year the clock format could handle.  Setting the date to
> 12/31/2155 and the time to 23:59:59 yielded 23:59:59 on 07/27/1976 or
> something like that.
> Now I seriously doubt that there will be many IIgs's still functional in 
> the
> year 2040 but I just wanted to let people know about this weirdness and 
> see
> if anybody has any thoughts about what might be causing it.
> This is untested on a Rom 00 or 03 as I don't have those machines.  If
> anybody wants, I can send the Prodos Basic program I've been using for my
> experimentations.
> Jayson.
>
>
>