On Fri, Mar 12, 2004 at 10:09:08PM +0000, Spyridon Dimitriou wrote: > --- Bob Blick wrote: > Yes, it is listed as supported, however there are only 6 or 8 chips listed > > as "tested". > > > Hmmm ... need to learn how to read! > > > Is there a "programmer test" function? Some of the programs I have used > > can test the loopback of data, and allow you to turn Vpp and Vcc on and > > off so you can check voltage levels. > > Yes there is a pin test that enables the relevant pins. This I have done, and > all checks out, i.e I have the correct voltage on the relevant pins. Under normal circumstances I'd let this go without comment. But as the TLVP developer I know better than to do that. So a further question: Exactly what voltages are at the PIC socket of the programmer? See David Tait designed the Tait Style programmer at the time when parallel ports were pretty much guaranteed to generate 5V when high. However every modern chipset develops only 3.3V for high, which is fine for the TTL level parallel port function, but fails miserably for PICS at 5V. At least 4V is required for a high to be reliably recognized. My Trivial programmers specifically takes this issue into account. > > So, would my other option would be to use a different linux programmer to try > and program the pic? Try my THVP. Should only take a 1/2 hour or so to wire. In fact you can even breadboard it to test it out. Just be sure that you test with a short cable to the parallel port. http://www.finitesite.com/d3jsys/proghvp.html Good Luck, BAJ -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads