[time-nuts] Garmin GPS12XL V3.51

[Peter Vince]

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 <
time-nuts at lists.febo.com> 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: david-taylor at blueyonder.co.uk
> Twitter: @gm8arv
>
>