In-Reply-To: <4042F7084FCDD311834B00104BCA47700B86EE@MAIL2>

John Orhan <JOrhan@EDM.COM.AU> wrote:
> I have seen a circuit where a 4Mhz Z80 was clocked at 10Mhz with the
> addition of a 10M parallel resistor across the Xtal. I don't know how/why
> this would work but am dying to find out.

This doesn't make sense.

The 10M resistor can't have anything to do with the overclocking.

For a start you don't connect a crystal directly to a Z80. It needs an
external clock oscillator.

Brian Gregory.
briang@cix.co.uk