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89C51ed2 interrupt vector

hi!
i just want to know how can i locate code with interrupt started at address 0x1000
i try to use the 3 steps from application note 104 i can see it in the memory map but it doesnt work i can't reach the interrupt
if i relocate my code at address 0x0000 everything run fine (including the interrupt)
an example with any interrupt will be helpfull(the code shouldn't start at 0x1000)
or another explain
thanks
koby

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