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From: schmid@jellosub.luftfahrt.uni-stuttgart.de (Georg Schmid)
Newsgroups: comp.sys.apollo
Subject: Re: problems with lpd
Message-ID: <195@rusux1.rus.uni-stuttgart.de>
Date: 19 Jul 90 06:50:48 GMT
References: <9007181542.AA05287@apollo.eng.ohio-state.edu>
Sender: zrf80385@rusux1.rus.uni-stuttgart.de
Reply-To: schmid@jellosub.luftfahrt.uni-stuttgart.de (Georg Schmid)
Organization: Dept. for Statics and Dynamics of Aerospace Structures
Lines: 24

We had the same error message when connecting a laserprinter to an 
Apollo some time ago, but now we have it running (LaserWriter IINTX, 
DN3500,SR10.2, prmgr/prsvr). 
The fact that lowering the baud rate makes your printer work leads me
to think that the reason for your problem seems to be the configuration 
of your serial port e.g. the handshaking protocol. If you're using 
'software'-handshaking via XON/XOFF characters (default for the 
LaserWriter IINTX) try the following:

   /com/tctl -default               // resets sio1
   /com/tctl -nosync -insync        // input sync

This lets the printer controll the synchronization of the transmission
(assuming that you use sio1 and 9600 Baud). If you don't have an AEGIS
environment, you'll probably have to use the UNIX command 'stty', but
I don't know much about that (though I'm not an AEGIS fan). 


________________________________________________________________________
Georg Schmid, ISD University of Stuttgart, W.-Germany     
email: schmid@asterix.luftfahrt.uni-stuttgart.de (129.69.110.2)
voice: 0(049-)711-685-2053
fax:   0(049-)711-685-3706
________________________________________________________________________