Due to a problem in the Quartus® II software versions 14.0 and 14.1, the Altera Dual Boot IP address map is incorrectly set to 0x0 - 0x7. This will cause issues accessing the IP using Nios® II or any Avalon Master.
To work around this problem in the Quartus II software versions 14.0 and 14.1, follow the steps below:
1. Open the hw.tcl file in a text editor. The hw.tcl for the IP, which is located at
<installation directory>\<Quartus version>\ip\altera\altera_dual_boot\altera_dual_boot\altera_dual_boot_hw.tcl
2. Change
set_interface_property avalon addressUnits {SYMBOLS}
to
set_interface_property avalon addressUnits {WORDS}
3. Re-launch Qsys
4. Remove and re-add the component to your system, and re-generate the system
This problem was fixed in Intel® Quartus® software version 15.0