On a 16F872, and 16F84 for that matter, I've gathered that MCLR
should be connected to Vdd during normal operation.  However,
some circuits I run across show this going thru a 1K or other
resistor.  Why is this?  (I expect that there is a good reason for
adding another component).

Makes ICSP possible?

Wouter van Ooijen
--
Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler, Wisp programmer, WLoader bootloader, PICs kopen

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.