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    What do you mean with "correctly"? You don't need to set fuses to use the 328 without a bootloader. Commented Jun 27, 2024 at 13:20
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    For instance, I have to disable BOOTRST to use memory of boot loader. You won’t see any problem in most cases, until firmware size is comparatively small. My Arduino Nano won’t start with firmware of size more than 30720 bytes until I disable BOOTRST. Playing with BOOTSZ1 and BOOTSZ0 also spares some more bytes. However, I can’t find ultimate manual how to be able to use all the 32768 bytes. Commented Jun 27, 2024 at 13:35