Boot Sequence & Startup Code

Everything that runs before main(): the reset vector, copying .data and zeroing .bss, the vector table, and how a bootloader hands off via VTOR.

22 min read

In this lesson:

This ties together the memory map (.data/.bss), the linker (sections/symbols), and vector tables (function pointers) from earlier lessons.

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Registers & Memory-Mapped I/O

GPIO: Digital I/O

Interrupts & ISRs

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