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CobraRTP Flash Online
From MS4X Wiki
Flash Online from CobraRTP is a flash chip emulator that can emulate the following modules: AM28F200, AM28F400 / AM29F200, AM29F400, AM29F800.
You can find all the latest information of the device at the product page here: https://cobrartp.com/en/store/flashonline/
For any kind of downloads (manual, firmware updates, software utility) go to: https://cobrartp.com/en/downloads/
This page shows how to setup a tuning environment for MS43, but other ECUs can be similar.