An interrupt handler should do the bare minimum. If you need to do heavy data processing, use the handler to "flag" the work for a background task and exit immediately.
#include void interrupt far (*old_handler)(void); // Pointer to save the old handler void interrupt far MyNewHandler(void) // ... custom handler code ... old_handler(); // Chain to old handler if necessary void install_handler() // Save old handler for interrupt 0x09 (keyboard) old_handler = getvect(0x09); // Set new handler setvect(0x09, MyNewHandler); void restore_handler() // Restore the original handler before exiting setvect(0x09, old_handler); Use code with caution. 5. IVTHandleInterrupt vs. Modern Interrupt Handling ivthandleinterrupt
Kernel, Interrupt Handling, Embedded Systems, Debugging, I/O Kit An interrupt handler should do the bare minimum
Have you encountered ivthandleinterrupt in a specific legacy codebase or chip SDK? Share your experience in the comments below. custom handler code
The system's security features flagging valid but slow-reacting hardware. How to Fix IvtHandleInterrupt (0xE6) Errors
In FreeRTOS, you might define a macro wrapper:
Here's an example of how to use the IVTHandleInterrupt protocol in a UEFI driver:
