I think there is some misunderstanding about what “old style MSFS coordinates” we are talking about.
These are the maps which were provided with Sublogic Flight Simulator 2 back in the 80s:
On the bottom of the chart you can see the coordinates which were used in the game to position the aircraft.
These coordinates range from 0 to 32767, one for latitude, one for longitude.
And these coordinates were used in various manuals and books of the time, to give the position to setup, where the flight begins.
This coordinate system was used from Flight Simulator 1 til FS4.
FS5 introduced a new coordinate system.
Kelleytoons was asking for a way to convert them to GPS coordinates.
This conversion is what my post was about.
It doesnt matter if the result is in decimal degress (DD) or so called sexagesimal degrees (hours, minutes, seconds), as MSFS takes both formates, and converting between them is trivial.
Unfortunately, the conversion as I described above is not very accurate.
So to get the exact positions, I currently load the FS2 on a Commodore C64 Vice emulator, start the flight with the given coordinates, and cross check between the in game map and MSFS map, where the correct start position is for the flight adventure.
If someone has any idea how to refine the formula or its parameters, in order to get more accurate conversion, I would be interested.