Change the offset for the interrupt vector

Hi I working with 89c669 and want to change the program start address to 0x016000h. But when I try to change the Interrupt vector to that address I get "Invalid Interrupt Vector Address !" Why can...
Change the offset for the interrupt vector

Hi I working with 89c669 and want to change the program start address to 0x016000h. But when I try to change the Interrupt vector to that address I get "Invalid Interrupt Vector Address !" Why can...
My code is not working if i change the address of flash memory , where the code can be loaded and if change the address back to the base address 0x80000000 then it works. Why?

I am trying to make a custom bootloader, and for that i need to change the flash memory address of the user code (the code which i will upload through the bootloader). So , i made a GPIO Toggle code with...
My code is not working if i change the address of flash memory , where the code can be loaded and if change the address back to the base address 0x80000000 then it works. Why?

I am trying to make a custom bootloader, and for that i need to change the flash memory address of the user code (the code which i will upload through the bootloader). So , i made a GPIO Toggle code with...
how to change the permission of the file

file are read only . how to changed this file permission to write also.this file is locked.