Thread: Garmin TransAlpin 2012 Pro

Originally Posted by GPSFranz

1. What is the Ms flag used for?

Ms flag steers, if map image will be shown in bascamp (or homeport) or not

Originally Posted by GPSFranz

2. What are the possible Ms flag values, and what do these values indicate or determine?

a flag (in informatics) has always the values 0 or 1
0 determines map will be shown in basecamp
1 determines map will be not shown

Originally Posted by GPSFranz

3. Why do some IMG files contain unlock codes (i.e., why are the unlock codes in the IMG file, not just in a separate .unl file)?

Map images from original Garmin SD cards are unlocked for the SD card with them are sold. In this case the unl code is inside the img file.

Originally Posted by GPSFranz

4. Is a separate .unl file required, even if an IMG file contains an unlock code?

An .unl file is no more necessary and also not usefully, because it doesn't work for MapIDs >2200. Better use Unlocker like gimgunlock to unlock maps (if they aren't unlocked yet).

Originally Posted by GPSFranz

5. If a separate .unl file is still required, do the unlock codes in the IMG file and in the separate .unl file have to be identical (or can they be different, yet both valid unlock codes for a given GPS unit or SD card)?

If the unlock code would be necessary or useful, it has to be valid for the device - it's irrelevant, if it would be inside or in .unl file. It would be also irrelevant, if inside or in .unl file are more than one codes - only one code must be valid.

Originally Posted by GPSFranz

6. What software product puts the unlock codes in the IMG files, and when (or under what conditions) does it do so?

look answer #3

Originally Posted by GPSFranz

7. Why and when (or under what conditions) does an IMG file contain more than one unlock code?

All questions about unl codes are irrelevant :D. But if you want to know it absolutely: it is possible to write valid codes for more than one device into the map img or one img file can contain tiles of more than one map - so for every MapID would be necessary a valid code.