Johannes, you are correct of course, the hack is not elegant, it is a brute
force approach as I describe it on the web page.
I prefer to switch over when the Newton is either off, or when just at the
backdrop application, and about 49 times out of 50 it works fine. I throw
the switch, and continue using it as normal. The 50th time, I need to press
the reset button.
For $10 it seemed I was getting good value, and as I say on the web site, I
have never lost data this way.
Others' mileage may vary, and with any hardware modification there are the
usual risks, warnings, and disclaimers.
The bottom line I think, is if you do not like this simplistic method due to
potential risks, then either PCBman's or PixSolution's products are perhaps
more for appropriate.
-Stephanie
> My compliments, Stephanie,
>
> but beeing an electrical engineer I have to admit that I do not really like
> the very simple solution of switching two crystals and doing this via
> relatively long wires.
> Ok, a frequency of 3 or 5 MHz is still considered to be low, but the wires
> should be shorter.
> What will happen in the moment you switch over? In the first moment there will
> be no clock at all and then the second crystal will hopefully start to
> oscillate quickly after being connected to the oscillator.
> And because the crystal frequency is multplied it is not clear how the real
> clock will look like at this moment and how the processor will react...
> The idea of Mr. PCBman to switch them electronically seems to be much more
> safe. And all what you need is a few logic circuits...
> But of course you will end up in the need for a PCB and all that staff...
> In this respect your solution is much easier of course.
> Nevertheless I have some doubts to implement this simple solution.
>
> Johannes
-- This is the Newtontalk mailinglist - http://www.newtontalk.net To unsubscribe or manage: visit the above link or mailto:newtontalk-request_at_newtontalk.net?Subject=unsubscribe
This archive was generated by hypermail 2.1.2 : Fri Feb 01 2002 - 16:02:51 EST