On 12/02/11 15:32, WanMil wrote:
I observed that the MapSource search menu is disabled if the MDR file is larger than 0x7FFFFFF (134217727) bytes.
Maybe in this case a flag must be set?
My guess is in ImgHeader:
// This sectors, head, cylinders stuff appears to be used by mapsource // and they have to be larger than the actual size of the map. It // doesn't appear to have any effect on a garmin device or other software. int sectors = 0x20; // 0x20 appears to be a max header.putShort(OFF_SECTORS, (short) sectors); int heads = 0x20; // 0x20 appears to be max header.putShort(OFF_HEADS, (short) heads); int cylinders = 0x100; // gives 128M will try more later
Try boosting cylinders to 0x200, or try to find if there is a maximum useful value like it appears that there is for the others.
..Steve
My first simple tries were not successful. MapSource reject the maps with changed cylinder values. So I have started to implement the display for the IMG file header to be able to analyze it. There are many solutions possible: * Wrong E2 value? My large MDR-IMG files use E2=3. This seems to be too low. * There are still quite a number of unknown bytes. Some of them are set in my official Garmin maps.
WanMil
Hopefully the patch helps to find the correct settings for larger IMG files. WanMil