Re: [mkgmap-dev] Problems with routing on Etrek 20 with latest firmware
Message: 3 Date: Thu, 28 Jul 2016 20:06:46 +0100 From: ael <law_ence.dev@ntlworld.com> To: mkgmap-dev@lists.mkgmap.org.uk Subject: Re: [mkgmap-dev] Problems with routing on Etrek 20 with latest firmware Message-ID: <20160728190646.GA4953@shelf.conquest> Content-Type: text/plain; charset=us-ascii
On Thu, Jul 28, 2016 at 12:36:03PM -0400, Greg Troxel wrote:
do you have pointers to older firmware, and can you roll back to 4.20?
Garmin seem to do their best to make it difficult to get their firmware images. Anyway, I seem to remember reading that it was not possible to roll back to older versions. But maybe my memory is wrong. But I don't want to risk bricking my Etrek. It is possible that I still have the older firmware somewhere.
I have an etrex 30 with 2.80, which basically works.
Yes, I am pretty sure I was on 2.80 before, and had no problems.
I suppose a conspiracy theory would be that Garmin changed something to bread mkgmap, but I guess it is more likely that the reverse engineering of the map format is imperfect, and this new bug may be the opportunity to track down such imperfections. Which is why I thought the developers' list was the right place to post.
If I can find the old firmware image, and am sure that reverting won't brick the unit, I will give it a try.
I may also try some of the other maps suggested, although I am currently away from home with limited internet bandwidth, so large maps might be a problem ATM.
Thanks for the suggestions.
ael
You may be able to locate firmware for your unit at www.gawisp.com/perry/agree.html. Mark Bradley
On Sat, Jul 30, 2016 at 03:38:30PM -0400, Mark Bradley wrote:
You may be able to locate firmware for your unit at www.gawisp.com/perry/agree.html.
Thanks again for the suggestion. Unfortunately that is just an archive of the dumbed down Webupdaters (which assumes particular operating systems) rather than copies of the real GUPDATE.GCD firmware images. I assume that the said images files are embedded in the updater files. Why Garmin haven't left the URI's on their website as before for those who know how to use them [it isn't hard] defeats me. It used to be possible to talk to competent people at Garmin support who actually understood technology. These days I only seem to meet boneheaded incomprehension :-) ael
Try running a zip program on the non gcd file. (I normally use 7z, but I assume other will work as well) It should let you extract the GUPDATE.GCD from the .exe Bill On 08/20/2016 12:54 PM, ael wrote:
On Sat, Jul 30, 2016 at 03:38:30PM -0400, Mark Bradley wrote:
You may be able to locate firmware for your unit at www.gawisp.com/perry/agree.html. Thanks again for the suggestion. Unfortunately that is just an archive of the dumbed down Webupdaters (which assumes particular operating systems) rather than copies of the real GUPDATE.GCD firmware images.
I assume that the said images files are embedded in the updater files.
Why Garmin haven't left the URI's on their website as before for those who know how to use them [it isn't hard] defeats me.
It used to be possible to talk to competent people at Garmin support who actually understood technology. These days I only seem to meet boneheaded incomprehension :-)
ael
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On Sun, Aug 21, 2016 at 01:06:43PM -0700, Bill wrote:
Try running a zip program on the non gcd file. (I normally use 7z, but I assume other will work as well)
Garmin (http://www8.garmin.com/support/download_details.jsp?id=5553) only provide direct access to Garmin Express these days. Running 7z on GarminExpressInstaller.exe does unpack many files but nothing that looks like the firmware image. That fits with the description of Garmin Express that seems to search for the latest firware, presumably using the missing URIs perhaps to a ftp server.
You may be able to locate firmware for your unit at www.gawisp.com/perry/agree.html. Thanks again for the suggestion. Unfortunately that is just an archive of the dumbed down Webupdaters (which assumes particular operating systems) rather than copies of the real GUPDATE.GCD firmware images.
I looked again at www.gawisp.com/perry/agree.html and saw that the *.gcd files were there after all. My apologies. The file with the latest time stamp there is eTrex20x_30x_Webupdater__230.gcd. So it is not obvious which firmware version that represents. It does not seem to be 4.30: perhaps it really is 2.30? I have a copy of the 4.30 GUPDATE.GCD which is 9467284 bytes long and has a sha512 checksum of 1dd7262da8566a153a40bb65fc36238069253afc0b7a0a670733633df1d6864864198a5d6e1b09e37b4606725752ce523e03da2893d45ee5a442d308a0d4b2bb I downloaded that from http://download.garmin.com/software/eTrex20_30_Webupdater__430.gcd which is still there and seems to be the current "missing" URI. It seems probable that future firmware versions will follow the same pattern. ael
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