KENMORE2.TXT  ---------------------------------------------------

v 2.0
01/11/87  -  Revision to Bob Koller's approach for the NS Advantage
 	     consists of using a Z80 extender board available from
             Fisher Computer Systems (a North Star sales and repair
             independent), in lieu of the somewhat tricky cable off
             the z80 socket.

			by:  Bob Dean, Sysop
			     Drexel Hill North Star RCP/M
			     [215] 623-4040

------------------------------------------------------------------

	I was very anxious to learn that Bob Koller had successfully 
installed the Kenmore Ztime clock in a North Star Advantage, as perhaps 
one year earlier several others had tried without success.   For one,
the clock wouldn't fit properly into the z80 socket.  For another,
the default memory address was utilized by the Advantage for something
else. 

	This was after looking for a clock/calendar most especially for
use on the RCPM, and to explore date stamping of files (have yet to
broach that one).

 	I had had discussions with several sources about clocks for 
the Advantage.  Patrick Beard has successfully installed the Hayes
Chronograph for his RCPM at Berkeley, and has even extended the features
to MSDOS on the 8/16 (yea Patrick), but try and find a reasonably priced
(aka used) Chrono!  New ones are $200+, if you find a dealer!  And he
had to make some CBIOS changes to get it to work, which were pretty 
cute. 

	There was discussion of one made in Germany, or Massachusettes, 
depending upon whom you talked to, and there is an outfit in New Jersey 
who makes one associated with an industrial i/o.  After going back and 
forth with them with some unfulfilled promises, I was getting very tired.             

	There was also an offer on the NSCS board in Seattle to homebrew
a clock if there were enough interested parties (there wasn't). 

	So, when Don Appleby (Sysop, Bankers & Hackers, Long Beach)
reported Bob's success and appeared with ZTIME.LBR, I was elated!

	Then, reading his KEMMORE.TXT file, it seemed rather tricky for 
us mere mortals ("insulate and solder a ground to the board...").  Not 
wanting to risk frying my motherboard in a short, I was leary.

	Well, shortly after that while talking to Randy Fisher of
Fisher Computer Systems about fixing my new (used) ailing second 
Advantage, I asked him about his experience with clocks for the Adv.
He heard of my leariness, and suggested a board he had had made 
associated with another product.  It was an extender board for the 
z80 socket, which might solve the space problem that the Kenmore clock.

	I ordered it, and ordered a Ztime clock from Kenmore without
the cable extender (comes with or without).  The combination fit 
perfectly!  (Thanks, Randy!),

	But, I still couldn't address the clock.  

	Turns out that you better believe Bob Koller when he says 
"cut the trace" or the solder connection on the Ztime at the default
memory location, and install a jumper (short piece of wire) at 40H.
That was my problem.  
	
	A quick trip thru the Advantage Technical Manual shows that
40H is the only address which is available both to the Advantage AND
to the ZTIME clock.  Now, you will loose the availability of the 
second boardlet slot (which was my modem port)...but, it is pretty
simple to move the SIO boardlet to slot 3.  You will then need to
re-do your communications software (IMP, MEX, BYE5, etc.) to recognize
SLOT 3, but with MLOAD it is a snap.  (Be careful you get the most
current updated overlays, there are versions of these around which don't
work with SLOT 3.

	There you have it, a bit "cleaner" installation using the non-
cabled Ztime, and Randy Fisher's z80 extender board.  Been working 
perfectly for several months now.  (Incidentally, it didn't increment
the year for 1987...you will need to update it for each year).

	Thanks go to Bob Koller, Randy Fisher, and the nice woman at
Kenmore for their support.  And to Don Appleby for making me aware of
Bob's file ZTIME.LBR to begin with.  Far as I'm concerned, this solves
a long standing problem.

                                               Bob Dean