> The 16c84 does not have an internal oscillator - it always needs external
> components, those PIC's which do have an internal oscillator do not need a
> connection to the external pins - often these pins are dual
> purpose and are
> I/O ports when not used for the oscillator.

Oops, missed that bit.  What crystal and cap values should i use then to get
a nice stable 10Mhz clock; or should i use an RC circuit instead? I need it
to be pretty accurate though.

My knowledge on PICs is still very much in its infancy, but im learning. My
electronics is even more rudimentary, but i know what i want and i can learn
how to do it.

And learning how to code in assembler again makes me sleepy :-)

Basically what im trying to do it read 2 frequencies and display the values.
One frequency is the pulses from one of the coils on a motorbike. The other
is for it's speedo. The problem with the revcounter one is that i have to
multiply the freq with a constant value in order to still display the
correct value. Should i do this in assembler or with a PLL?

Thats all for now.

John