[not a solution, but info worth sharing] Hi Jonathan, when I read your description my thoughts went back to that time my Garmin Geko 201 (small GPS tracker) recorded a date 15 years back in time.
Digging around I discovered that GPS/NMEA carry a 10 bit "week" information, which makes a rollover every 1024 weeks. But quoting a search result (written in 2013): The last rollover (and the first since GPS went live in 1980) was 0000 22 August 1999; the next would fall in 2019, but plans are afoot to upgrade the satellite counters to 13 bits; this will delay the next rollover until 2173 So what you are seeing is not due to a week rollover, even though my Geko 201 showed the problem in 2010 (and others too). Perhaps Motorola hardcoded a "starting date" that matched a week number and counted from that point. Then a software variable has overflowed or 1024 have passed and you're back to "Oncore UT day 0". If the delta_days is constant you might add it to your code right after reading the date information? You might discover is it some integer number falling within powers of 2. :-) Paolo PS: Garmin has issued a firmware update for the Geko 201. But I doubt I will get a new firmware in 2019... -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CABj2Vab8pYOcfn9ttwxtRx7%2BX-Egrhdt_7ns%2Bw6%3D1UsWGJumEw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
