Date   : Tue, 19 Sep 2006 09:25:25 +0100 (BST)
From   : gARetH baBB <hick.bbc@...>
Subject: Re: smartwatch

On Fri, 15 Sep 2006, Bob Devries wrote:

> A SmartWatch is a chip made by Dallas Semiconductor. It's a real-time 
> clock. Some of them were made to fit underneath a ROM chip. I thought 
> that since the Beeb has a plethora of available ROM sockets, *someone* 
> would have implemented a driver for one of these. The Maxim/Dallas 
> DS1216 is supplied in a 28 pin socket, into which the ROM chip can be 
> piggy-backed.

PMS used one for their BBC RTC, and I've written code to access one - they 
are very simple things - which I was trying to get working reliably on the 
Electron for PMS, but unfortunately all the access timing issues on the 
Electron were a big barrier.

I think I've used the Dallas thing in another non-Acorn related project 
too.