gdb help!!!

I can access 0xffb00028 (the internal register ) in my program .but in the gdb enviroment ,when i type x 0xffb00028. the output is Cannot access memory at address 0xf0b00028 and the ./netsiliconLibRemote.exe 's output is: Memory Read f0b00028 Error : Target Bus Error . why can help me??? I want to track the value of 0xffb00028(portc configuration register)

It’s a problem with GDB/Raven combination :frowning: Use free debugger from just to read those registers