We found way to save gmapsupp.img or gmapprom.img file to GPSMAP278 on internal memory......
Create for instance....... map "test" on C:\ than create gmapsupp.img with Mapsource........you can also rename it in gmapprom.img and put file in that "test" map
than go to start button and start cmd.exe (commander)...... than type cd... twice to get to c:\ connect GPSMAP to USB ( watch out that your battery level is sufficient for data transfer)
And than type in commander:
Webupdater.exe /upload_file rgn=49 path=c:\test\gmapsupp.img /autorun usb /i (for gmapsupp file)
Webupdater.exe /upload_file rgn=49 path=c:\test\gmapprom.img /autorun usb /i (for gmapprom file)
and transfer will begin! For correct transfer you must have webupdater preinstalled!
ONLY PROBLEM IS!!!!..........that i don`t know how to erase loaded img file if I want to replace older map with newer for instance!
Webupdater will say that there is not enough memory left on GPSMAp
I found some directions........but I am not keen on hacking and I don`t know how to use them...
- WebUpdater should be run in installer mode.
[/k] - WebUpdater should keep running after a successful transfer.
[/autorun usb|serial] - WebUpdater should autodetect a USB or serial device and begin transfer immediately.
[/checksum_check rgn=<rgnnum> chk=<chksum>] - After transferring data to the region specified, WebUpdater will request the unit to checksum this region.
[/unlock_check fid=<familyid> pid=<productid>] - Before transferring data, WebUpdater will ensure that the user has unlock codes for the given family and product.
[/sacrifice_maps rgn=<rgnnum>] - WebUpdater will ask the unit if <rgnnum> is large enough for the data it will receive. If not, MapSource maps will be erased to make room.
[/offline path=<location of Package.XML>] - WebUpdater will perform the update using Package.XML instead of the Garmin server.
[/upload_file rgn=<rgnnum> path=<location of img file> -autorun usb|serial] - Performs image transfer.
[/offline path=<location of update files> -autorun usb|serial] - Performs all updates in the given folder.