That's a good point. But, even so, we assume (at least I do) the computer's clock is a good reference. And gaining 1s every hour is pretty imprecise for me. It's 12 minutes per month, and 2 hours per ...
Re RTC routine by ckielstra in Code Library:
http://www.ccsinfo.com/forum/viewtopic.php?t=26177
I'm sorry for ressurecting this topic, but there's a question made some posts earlier that wasn't full ...