Hex and Bin are both just coding for how things are translated (computer language). Everything electronic essentially runs on binary. Hex is just converted binary basically (different language). To be able to understand, read and edit it it takes tremendous amounts of knowledge and resources via tools and asscociates to accomplish things in it. I personally have over tens of thousands of dollars in tools and software to read edit and convert data for different software and hardware to flash into these trucks but am nowhere close to having the abilities that some of these big companies have. Companies like HPTuners makes it very easy for everyone to tune vehicles but there are going to be limits on what is achievable without all the other tools and knowledge due to them keeping their noses clean with government and what not. Not sure how else to explain it better. It's very secretive for 3 main reasons one is it is peoples livelihood. It is how they pay their bills and feed their families. Also they have hundreds of thousands of hours in creating, finding, testing, buying, learning that is not able to be replaced. Why would they give that away for free. The other is it is honestly too complicated to even try to explain to people that don't understand how things like this work that don't understand some very basic and some very complex computer programming. Here is a screenshot of section of a Hexidecimal read of a very primitive ECM (95 7.3 Powerstroke). 17+ Powerstrokes have 50,000+ maps in the ECM alone.
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