19 May
2001
19 May
'01
9:48 a.m.
On Fri, 18 May 2001, Richard Erlacher wrote:
Maybe the SmartSocket isn't what I wanted.
Somewhere in the "pit" I've got a
Dallas socket that has a 3-volt battery in the bottom. It's potted in place but
provides 3 volts on pin 24, (maybe pin 28, but the upper left corner, anyway) in
this case and does nothing but provide power to keep the content of the resident
IC intact, and, maybe, gate the write signal off until the power is stabile. I
do believe there's no continuity between the write pin on the resident IC and
the corresponding socket pin, so something's going on. That sort of device
might work, don't you think? Next time I'm at the Dallas web site I'll try
to
find the socket and let you know what the appropriate nomeclature is.
Dick
There is/was a Dallas SmartClock(?) that contained a battery for the
internal clock/calendar and also carried a 28-pin socket atop the
package. I don't believe that battery voltage was provided to the
socket though. Ampro used them in their LittleBoard/PC.
- don
----- Original Message -----
From: "Pete Turnbull" <pete(a)dunnington.u-net.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, May 18, 2001 1:43 AM
Subject: Re: Slicing open the top of a 48T02 Sun Sparc chip to replace battery
is that thing hollow or filled with epoxy?
On May 17, 19:34, Richard Erlacher wrote:
Has anybody tried one of the DALLAS "smart
socket" products with this
thingie?
Unfortunately the 48T02 is a TOD clock and calendar as well as NVRAM, so
there's no suitable SmartSocket to replace it. The registers have to be at
particular places and use a particular protocol too.
--
Pete Peter Turnbull
Network Manager
University of York