I dug out my old Garmin GPS-III's (mid 1990's vintage !). The internal
backup batteries had completely died after many years of non-use, so it
took a while for them to find the satellites, but when they did, they, of
course, came up with an August 1999 date. A quick "Google" found that
someone is hosting a zipped Windows executable (apparently originally from
Garmin) that you run when the satnav is connected to your PC via a serial
cable, and it corrects whatever internally so that the date is reported
correctly. Works like an absolute charm! The program doesn't say it is
specifically for the GPS-III, so it might be using a standard
(undocumented, of course!) message that will work on a whole bunch of
receivers. Might be worth giving it a try? See:
https://sites.google.com/site/gnbaddeley/GpsEow_V1.20_PC_Software.zip
Regards,
Peter
On Mon, 8 Apr 2019 at 14:01, David J Taylor via time-nuts <
[email protected]> wrote:
> I checked today the GPS12XL I have, and that came up with a date in
> August 99, before dying a few minutes later. Firmware 4.57.
> []
> John
> ================================
>
> John,
>
> I think my 12XL firmware 4.60 is OK. Perhaps you can update the firmware?
>
> Cheers,
> David
> --
> SatSignal Software - Quality software for you
> Web: http://www.satsignal.eu
> Email: [email protected]
> Twitter: @gm8arv
>
>
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