Hi Dan

Please, first read this page: https://chirp.danplanet.com/projects/chirp/wiki/DevelopersProcess

I'm currently reverse engineering Yaesu FT-8900's memory map using following procedure:

• I'm working this reverse engineering primarily in Ubuntu, as it is easiest for me to debug Python there, using the Pycharm IDE.
• Check out Chirp's repository using Pycharm's own Mercurial support.
• I have created two spreadsheets for helping this development:
• First one, where I'm maintaining settings areas as horizontal rows and configurations (readouts from device) as vertical columns. Sample: https://tuulos.org/nxld/index.php/s/5ELcBBKPqFGfZk2 (link valid till 14-Jan-2019)
  
• Second one, where I'm writing out memory areas, which I have reverse engineered, if I'm not writing them directly to Chirp memory maps.
  
• I'm making small changes to device configuration and creating a new vertical column, where I'm documenting the change. Then, I'm reading out the memory map from device.
• I'm converting the memory map dump to text file using standard Linux hexdump command. Each vertical column has its own text file.
• Meld is practical tool to compare those hexdump files. Using that, it should be possible to isolate, which memory areas were affected by device configuration changes.
• After finding out, what was changed and how, I'm implementing support for those, by expanding the earlier implementation.

This is a pretty time consuming process, but so far, I have been able to isolate some new device settings/configurations and bring them to Chirp. Most likely, this will take still at least couple of weeks before I'm able to publish my changes.

BR,

  Kalle

I am a new Ham, and I foolishly selected a radio that is not supported by CHIRP. (Yaesu FT-4XR). I wish to add support for it and its recent Yaesu siblings. I have successfully analysed the serial protocol and I  can read and write the memory, but I don't know what to do next. Is there a HOWTO somewhere? If not, I can attempt to create one, but some guidance would be appreciated.

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