Hello Piccers,

 Wooah ! Yesterday, I finally made JD Mdsen "PIC-Programmer 2" work ! (it was
rather this morning than yesterday ;-).
For the design, have a look to : http://www.gbar.dtu.dk/~c888600/newpic.htm

I was using PIP02 V1.25 (on a DOS window under WIN95, on my  laptop : 486 /
40 MHz).

The problem came from the supplies that went down when I put my 16C84 on the
socket, although, without any load (ie no PIC), it was ok on the  scope !
 -> All went ok when I isolated the non-used pins of the 16C84. In effect,
Jen uses one only socket for several types of PICs so the Vdd, Vss, Clock and
Data are also applied to others pins (although Vdd is only on Mclr !!!)
 -> I only kept : Vdd, Vpp, Vss, Clock and Data
I didn't go on my investigations to discover which pins were the ones that
were collapsing the supply (it was not far from 1 am ...).

So :
1) I'm glad that JDM programmer actualy works ok (despite the fact that
plenty of people denies that !) ; at least, it runs for me with the 16C84
(Now, I have to try with 16F84 and 12C509).
Note that my laptop only supplies +/-9v on the RS232, but both Vdd and Vpp
are under the specifications on the scope ...)

2) I hope this could help other users ...

3) If anybody of you experienced such problem or you could tell me the pins
that have really to be disconnected, I would be glad to hear of you and,
perhaps I could save some time !

Thanks JDM for his design (finaly ;-) very convenient !

Hope I get also some answer :-)