Existing header file (i.e., "ADuC84x.h") included with SDCC releases was modified to support other 8052-based microcontroller chips - namely Analog Devices ADuC845/847/848. New file was named "ADuC847.h". See attached for the file. Use and review by the community would seem beneficial if this file were provided in future SDCC releases.
Header file for ADuC845/847/848