Re: No Slot Clock

[dempson@swell.actrix.gen.nz (David Empson)]

In article <mnementhCH811F.47H@netcom.com> mnementh@netcom.com (David R. Villegas) writes:
> I'm considering hunting down a No Slot Clock for a hardware project and was
> wondering if anyone knew if its batteries were replacable.

Definitely not.  They are a throw-away item after the battery dies.
They have a battery life of five to ten years, I think.

For your information: the No Slot Clock is actually a SmartWatch, from
Dallas Semiconductor.  Dallas make several memory backup and
timekeeping chips.  The No Slot Clock is just one of several models (I
think it is a DS1216-E, the version which sits under an 8k to 32k
EPROM or ROM).

They also make versions which sit under a 8k or 32k static RAM chip and
provide memory backup as well as timekeeping (DS1216-C).  I've used
this version at work, plus the 32k/128k RAM version and the standalone
chip which works with a separate lithium battery.

The only difference between buying a SmartWatch and a No Slot Clock is
that the latter includes all the software you need to use it on an
Apple II.  If you are planning on using the chip in your own project,
you would be better off buying a SmartWatch and save the extra money.
-- 
David Empson                                                               
dempson@swell.actrix.gen.nz                                                
Snail mail: P.O. Box 27-103, Wellington, New Zealand