I got in a TL866A programmer with the complete adapter set, pulled the flash chip from my dead TruePosition, and dumped the chip. Success first time! Now to go through the ROM dump and see what hidden goodies there are. A quick look seems to show commands for setting Kalman filter parameters and antenna (?) attenuation. Also a GAIN command (maybe EFC gain or antenna gain). There seems to lots of debug modes in it.

Cool. Should be interesting to see what you find. I've been hacking at the VxWorks side of things, off an on, but have been distracted by this #wannacry business among other things. That TL866 is certainly a good value, and it seems to work well. Looking forward to hearing what you turn up. I'll keep poking at VxWorks in the mean time. On 05/17/2017 08:46 PM, Mark Sims wrote: > I got in a TL866A programmer with the complete adapter set, pulled the flash chip from my dead TruePosition, and dumped the chip. Success first time! Now to go through the ROM dump and see what hidden goodies there are. > > A quick look seems to show commands for setting Kalman filter parameters and antenna (?) attenuation. Also a GAIN command (maybe EFC gain or antenna gain). There seems to lots of debug modes in it. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

Maybe I have a problem unit but I measured the supply to the antenna at 3.7 volts. I have a 5 volt antenna and it still receives sats at the lower voltage. Anyone else check this supply? I wonder if it is a settable parameter? Regards, Tom ----- Original Message ----- From: <ziggy9+time-nuts@pumpkinbrook.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Thursday, May 18, 2017 6:39 PM Subject: Re: [time-nuts] TruePosition GPS Receiver firmware > Cool. Should be interesting to see what you find. I've been hacking at the > VxWorks side of things, off an on, > but have been distracted by this #wannacry business among other things. > That TL866 is certainly a good value, > and it seems to work well. > > Looking forward to hearing what you turn up. I'll keep poking at VxWorks > in the mean time. > > On 05/17/2017 08:46 PM, Mark Sims wrote: > >> I got in a TL866A programmer with the complete adapter set, pulled the >> flash chip from my dead TruePosition, and dumped the chip. Success >> first time! Now to go through the ROM dump and see what hidden goodies >> there are. >> >> A quick look seems to show commands for setting Kalman filter parameters >> and antenna (?) attenuation. Also a GAIN command (maybe EFC gain or >> antenna gain). There seems to lots of debug modes in it.