Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!LL.MIT.EDU!sage
From: sage@LL.MIT.EDU (Jay Sage)
Newsgroups: comp.os.cpm
Subject: ZSDOS on Xerox 820-II
Message-ID: <9101071414.AA11573@LL.MIT.EDU>
Date: 7 Jan 91 19:14:13 GMT
Sender: usenet@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 33

Mike Sprague described his travails with getting ZSDOS installed on his Xerox
computer.

>> So, I tried MOVCPM * *.  I kept getting the message SYNCRONIZATION ERROR,
>> and the computer locked up, forcing me to push the reset button.

   That shows that the system you were running at the time was not one
created by that version of MOVCPM, which checks the DOS serial number in the
first six bytes of code.  Digital Research punishes one for trying to use a
'borrowed' MOVCPM by locking up the system.

>> MOVECPM ... seemed to work this time, though it came up with the
>> following.
>>  
>>      CCP   0000H
>>      BDOS  0800H
>>      BIOS  1600H

   This may or may not be a problem.  I don't remember what those values are
supposed to be.  I'd recommend that you look at that image file and see where
the CCP, DOS, and BIOS appear.  Normal SYSGEN images have them at 980H,
1180H, and 1F80H, respectively.

   I would also suggest that you make up a new boot disk based on the system
generated by MOVCPM and make sure it works.  Then go back to the ZSDOS
installation.

   Chris McEwen at Z-Node #32 runs this stuff, I'm quite sure, on Xerox 16/8
computers.  If it will work there, it should work on your simpler machine. 
Also, I seem to recall that the clock module menu includes something for the
Xerox 820 (though I may be mistaken).  Good luck.

--- Jay Sage