Franky:

Thanks for the reply.  I am (and have always been) a little fuzzy on what the
pre-scalar does.  Now looks like a good time to get a handle on what I expect
is a simple thing.  I read the data sheets and I've tried to get a handle on it
but everything assumes I know what it is - and of course I don't.

How long does it take for the WDT to time out?  How do I use the pre-scalar to
slow it down.  I assume the prescalar does some sort of adjustment to the way
the WDT counts but I don't understand exactly how.  I'm using a 16C84 at 4Mhz
so I get 1uS per instruction FWIW.  Does the prescalar affect anything else?

>I don't know about the 16C84 but usually you have an additional postscaler.
>- Nice feature, gives you a little more time.
>Yes, and then it's exactly how you said. You calculate your cycles, until
>the WDT will run out, you count your instructions, and you insert a CLRWDT
>just before the WDT runs out.
>Do not put a CLRWDT in the loops where you are waiting for responds. But,
>you know that.
>should the WDT run out it will reset your pic.
>That's all.

>Bye

>Yours,
>          Franky X.
>^^^^^^^^^^^^^^^^^^^^^^^^^^schmalz@mailserv.rz.fh-muenchen.de