----------
> Van: John Bes <jbes@E-TRADE.NL>
> Aan: PICLIST@MITVMA.MIT.EDU
> Onderwerp: Disconnecting Xtal from pic16c84
> Datum: maandag 6 december 1999 21:15
>
> Hi all,
>
> I've just build  a icsp programmer. It took some time to get it to work.
> But finally I discovered that I had to disconnect the xtal from the pic
> during programming mode.
> It works fine now. But I'm not really satisfied: what is the fun of a
icsp
> when you have to build in a switch to keep (dis-)connecting the xtal?

Hello John,

  Just connect the Clock-in pin (Pin 16) to ground (with or without a
low-value resistor).  This will prohibit any generation of clock-pulses ...

The real problem is the Rise-time of your Reset-signal (at Pin #4).  It's
too slow.

Regards,
  Rudy Wieser