X'Address is an Ada attribute where X is any object, subprogram, package, task, label or other entity.
'Address may be used to return the address of the first element allocated to X. 'Address may also be used to set the address of X.
-- Hardware register Device_Input_Value : Integer_32; for Device_Input_Value'Address use To_Address (16#8000_05C4#);
Ada Reference Manual
- 13.3 Operational and Representation Attributes (Annotated)
- Annex K Language-Defined Attributes (Annotated)