Hello, One has a ram in 0-0x3FFF and rom in 0x10000-1FFFF placed. If one does not make a redirection of Interrupt Vector Table it's to expect that IVT should be put in the address range from 0-0x1FF. But this is a ram range. The question is : would be this program work in such configuration with a IVT placed in the RAM ? Thanks for any input, A