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How to program serial interrupts in 8051C for p89c669

Dear Friends...
I am Ramesh, working on project on p89c669 MC. I am facing problem in programming serial interrupts in 8051C for p89c669. it has dual UARTs. what is interrupt no.s used by 8051C for the p89c669. (Interrupt vector table ) Pls suggest some sample pgms on it...

Thanking you...

Ramesh.

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