On microcontroller systems like the STM32, interrupts are even more important, as this is what allows an MCU to respond in hard real-time to an (external) event. While on desktop computers these interrupts are less prominent than back when we still had to manually set the IRQ for a new piece of hardware using toggle switches on an ISA card, IRQs along with DMA (direct memory access) transfers are still what makes a system appear zippy to a user if used properly. They’re also crucial for making computer systems work as well as they do, as they allow for a system to immediately respond to an event. Interruptions aren’t just a staple of our daily lives.
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