4.3.4.8 How Can I Pack Data Into Flash Memory?

To specify the upper byte of variables stored into space(prog) sections, you can use either the -mfillupper option or the fillupper variable attribute. See the following sections of this user’s guide for more information:

6.6.1 Options Specific to DSC Devices (-mfillupper)

9.10 Variable Attributes (fillupper)