Jan-Erik Soderholm wrote: >Why do you need those "values" ? >I'm sorry if I missed something from the start of the thread. Well, yes - I think you did. I started the thread because use of CONFIG instead of __CONFIG caused my programmer to throw a FUSE error. It turned out to be because my programmer driver checks the fuse values against values in a "chipinfo.cid" file, and the values it checks them against are those generated by __CONFIG. And to repeat myself, this is because __CONFIG fills unused bits with '1's, but CONFIG fills them with '0's. I agree with what you say in general - it is just that I have a cheapo crappo programmer, which for some reason demands that FUSE values be of the old __CONFIG type. Now I understand, and can deal with the problem, the discussion has satisfied my needs, and I won't go on about it :) Regards, Phil Cross -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist