On Fri, Jan 05, 2001 at 07:03:17PM +0000, Ben Harris wrote:
> >I can't remember offhand how to reach these IDs, but Acorn called them
> >Unique Machine IDs.
> 
> They're in a Dallas Silicon Serial Number chip (erm DS1401?) attached to
> one of the control pins on the IOC/IOMD.  Access (as with the I^2C bus on
> these machines) is by bit-banging over the control register.  Currently,
> neither port has code to do this (arm32 gets the ID from the bootloader).

Oh... thats, maybe the same chip, or at least the same access method, as 
what the DraCo uses! It's a DS2404 there, which includes a battery backed
clock.

Regards,
	-is