Pgming protocol differs between chip families. What you really need to do is order/download the data books and app manuals. You'll find that there is a fair amount of detail to be taken account of using particular devices - Also help you make an intelligent decision about what pgmr you need. Jack rian Striggow wrote: > > Tnx to all for much good advice on purchasing a programmer. But maybe > someone can comment on the programming differences between various PIC > families, e.g. , why do some programmers list the PIC12c5xx and not the > PIC12c6xx in their device lists?? and etc. > > bcs