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How to process Hardware interrupt INT0 in Banking project

Hi i m using Atmel At89S52 Microcontroller in my banking project.I wanted to process the INT0 interrupt.

On my hardware platform i can see on the oscilloscope that logic 0 is coming on the INT0 pin.

What is linker's role in this inter-banking mechanism.

I m calling this routine from bank 3.so my function definition will be like as given below.

void Interrupt0(void) interrupt 0 using 3

but i m getting any results from this.

Kindly reply me on this....

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