Re: IIe no-slot-clock: battery replacement?

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

David Wilson <david@uow.edu.au> wrote:

> louiss@gate.net  (Louis Schulman) writes:
> >I may be mistaken, but isn't the NSC just a Dallas Smartsocket?
> 
> It is actually a SmartWatch - the SmartSocket goes under a RAM chip and
> turns it into NVRAM. The SmartWatch goes under a ROM and just provides time.
> There is one that goes under a RAM and provides time and NVRAM as well.

The one that goes under a RAM is also called a SmartWatch.  There are
several different models.  The letter suffix indicates the chip size and
type.  Here is a full list from Dallas Semiconductors' 1989 data book:

DS1216   SmartWatch/RAM 16/64K
DS1216C  SmartWatch/RAM 64/256K
DS1216D  SmartWatch/RAM 256K/1M
DS1216E  SmartWatch/ROM 64/256K
DS1216F  SmartWatch/ROM 64/256K/1M

The capacities refer to bits, not bytes.  The different sizes are
required because various static RAMs and ROMs are different sizes and
have the power supply pins in different places.

In the case of the No Slot Clock, you need a DS1216E to replace it.



In <3699EB80.8DA4F9DF@EuropeM01.nt.com>, Robert Lacoste
<RLACOSTE@EuropeM01.nt.com> writes:
>Even if you find a way to change the battery, do you think it will pass
>the Y2K bug ?

Dallas Semiconductor posted a Y2K statement on their web site about
this.  I haven't read it myself, but I believe it states that all their
timekeeper products are Y2K compliant, and will operate correctly up to
the year 2099.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand