In message <39E6E8B7.D5FFA42A@triode.net.au>, Graeme Odgers
<graemeo@TRIODE.NET.AU> writes
>Hello Nigel and Dan,
>
>Dan I agree with you, I've been using C'84 chips with the Dontronics parallel
>programmer for a couple of years and have had no problems with Nigel's
>software.
>
>This year we have been using the 20MHz F84A's - and have they been a pain.
>Some chips program just as easy as the C84's, but the majority do not!!
>
>To get them to program I have placed a small 330pF capacitor on the RB6 and
>RB7 to ground.  This has worked with some success for most chips, but there
>are a few stubborn chips that do not program very reliably.
>
>Nigel, is there a way to change the programming time (burn period) in your
>software?

The programming time can be altered from the hardware screen, it
defaults to 10mS, perhaps it's some of the other timings that need
alteration (such as the time between Vpp and VDD) - these are hard coded
in the program (at the moment!). Someone is sending me a 16F84A to try,
if you want to send me a really stubborn one I could try that?.
--

Nigel.

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        | Nigel Goodwin   | Internet : nigelg@lpilsley.co.uk           |
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        | England         |                 Ju Jitsu                   |
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