A few additional notes... :-) Byron Jeff wrote 2012-07-25 13:19: > I have definitely learned something today. > > Question: is the SHADOW important... I noticed that the "shadow" param in the LKR files is *not* documented (yet ?) in the usual documentation "ASSEMBLER/LINKER/LIBRARIAN USER=92S GUIDE" (33014K.PDF). > below because of the mapping between the > linear memory and the gprs? How is it different than having a single > extra linear line with a start of 0x2000 and end of 0x23EF? I guess that it is the "shadow" parameter in the LKR that enables MPASM/MPLINK to "know" that these two memory areas are the same. Jan-Erik. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .