Inspecting firmware updater of a old discontinued handheld mobile HAM transceiver
Firmware updater exe : DetectItEasy De4dot: VS Code ILSpy decompiled cleaned code dotPeek created VS solution Firmware ROM binary file inside VS solution, DetectItEasy: CPU is probably R8C. Some Ghidra R8 processor modules exists: https://github.com/silverchris/m16c