How can I install nested interrupts? With the key-word __irq is that not possible.
Bernd
First off: latitude is the distance north/south, so I assume that you mean longitude.
The problem is that the time zones doesn't follow exactly the longitude - they follow country borders instead.
If they did follow longitude, you would only need to check the longitude and know that there are a 15-degree difference between every time zone (24*15 = 360 degrees).
If you look at the following link, it will be obvious why the GPS coordinate is hard to use:
http://www.worldtimezone.com/
By the way - why post time-zone questions in a thread about interrupts? Because it takes too long time to create a thread of your own?