Another Question on Codar Clock - test-drb@ccmp.vtda.org

22 Aug 1999

...
 >See, for source code and documentation,
>
> ftp://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/codar/ 
...
 Cool, Thanks Tim!  Guess it's a good thing I wanted
to use it on my RT-11
system though :^) 
You'll find that the file CCSUBS.MAC is specifically for RSX-11.  It
also has a nice little table at the top, summarizing some of the
programming differences between the Codar 101/102/120/150/151 models.

...
 The Codar Clock board has a jumper to turn the battery
power on and off for
the board.  What good is this?  Is this just a way to save the battery life
when the board isn't in a system?

Is the board any good without the batteries?  It doesn't seem to be, but... 
I have several different Codar boards, and they all have batteries
set up slightly differently.  I *think* my 120 has two independent
sets of batteries, with a jumper to select which one is being used, to
allow you to change batteries without disrupting the clock.

...
 Considering I've no idea how ancient the batteries
are, they amazingly
enough function well enough for me to be able to turn the system off for a
short period of time and back on.  Not sure if they're strong enough for
longer periods. 
If they're like my Codar 120, they're lithium batteries, and good for
7 years or so.  I got a new set from Radio Shack about two and a half
years ago.

-- 
 Tim Shoppa                        Email: shoppa(a)trailing-edge.com
 Trailing Edge Technology          WWW:   http://www.trailing-edge.com/
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