Re: Apple Graphics Tablet

[Vladimir Ivanov <vladitx@XXXyahooXXX.com>]

On Mon, 18 Jun 2012, Michael J. Mahon wrote:

> tom charlesworth <tomch@macgui.com> wrote:

> > Hi Michael,
> >
> > I thought this sort of LC circuit was reasonably common back in the 80s?
> > EG. The Phasor card uses it to generate a 2MHz clock.
> >
> > Tom
>
> Isn't a 2MHz clock available?  The Disk ][ Controller uses it to clock the
> state machine.

Q3 is more like strobe than clock - both composite and non-50% duty cycle. 
The creative abuse in Disk II interface won't work for all scenarios.

> Also a 3.5MHz and a 7MHz clock...