Just found this by googling around. Have not already found it mentioned here. Hope that I did not overlooked it here.
Link:
https://www.jcwolfram.de/projekte/gtmicro_de/main.php
Not my work. Is from: V1.50 (c) 2018-2019 Jörg Wolfram
best, Peter
STM32 Emulator
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