>>
PIC12C508, Internal OSC, Internal reset, no watchdog. I now understand the
setting of OSCCAL in code thank to your help.
I have a timer period of 60 seconds delay. On the simulator the delay is
spot on. But when I run the code on a real device it is about 2 second
slow. Any suggested ideas...?

Yeah, live with it.  That's about 3% off, which is within the specs of the
internal oscillator at the right OSCCAL value, if I remember right (I don't
have the data sheet in front of my right now).

If you need better accuracy, you will need some sort of external reference
or external oscillator.


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