> Van: Ivan Cenov <okto7@BOTEV.TTM.BG>
> Aan: PICLIST@MITVMA.MIT.EDU
> Onderwerp: How to tell if PIC is in the socket
> Datum: woensdag 8 juli 1998 15:05
>
> Hi,
>
> I am developing my PIC programmer.
> Here is my question:
>
> How to tell if there is a PIC in programming socket ?
> Or is it possible thing ?
>
> Well, I can try programming, then verify, see
> the difference and stop. But I have counters for
> passed and failed PICs and do not wish to count
> missing PIC as failed to program PIC.

You could try to pull the Clock-input (OSC1) high, and see if the
Clock-output (OSC2) went Low.  Maybe even toggle the input  & see if the
output changes with it.

Greetz,
  Rudy Wieser