On 30 Nov 2002 at 10:59, Daniel Padilla wrote:
> I tried that a few months ago, but it looks like those speed selection
> pins are hard wired inside the chip to 162 MHZ. I did every single
> combination, higher and lower speeds, but it would never change, or at least
> i couldn't notice the difference and that program for testing the speed
> didn't show anything.
I am surprised by this, as I would not expect such a special batch of
StrongARMs to be created just for Apple. I do know that the CCCFG pins
function as described in the datasheets on other StrongARMs, as I have
one in my Acorn RiscPC. On this machine the CCCFG pins are brought out
helpfully to four DIP switches on the CPU card where, after a little
surgery to a couple of tracks on the board to void the warrantee, it is
possible to overclock happily right up to 287MHz. At least until the
SA110 begs for mercy anyways. ;)
> There's also a big "162" printed on the chip.
> Indeed, it's not an easy task to rewire the four pins but I *had* to try
> :-)
But of course. :) Which pins did you source VDDX and VSS from? How did
you manage to disconnect CCCFG from the motherboard?
Julian
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