3.3.3.1 How Do I Position Variables At An Address I Nominate?

The easiest way to do this is to make the variable absolute by using the __at(address) construct (see 5.4.4 Absolute Variables), but you might consider also placing the variable in a unique section (see 5.15.3 Changing and Linking the Allocated Section). Absolute variables use the address you nominate in preference to the variable’s symbol in generated code.