Interrupt Service Routine (ISR) for Interrupt Number 3: int_t1() interrupt 3

The code "void int_t1() interrupt 3" defines a function named "int_t1" that is an interrupt service routine (ISR) for interrupt number 3. \n\nIn this context, an interrupt is a signal that is generated by a hardware or software event to interrupt the normal flow of program execution. When interrupt number 3 occurs, the processor will automatically jump to the code for the "int_t1" function and execute it.\n\nThe "void" keyword indicates that the "int_t1" function does not return a value. The "interrupt" keyword specifies that this function is an ISR. The number "3" inside the parentheses represents the interrupt number for which this ISR is responsible.\n\nInside the "int_t1" function, you would typically write the code that needs to be executed when interrupt number 3 occurs. This code can perform specific tasks or handle events related to the interrupt.