Path: utzoo!attcan!uunet!lll-winken!ncis.llnl.gov!helios.ee.lbl.gov!pasteur!ucbvax!decwrl!hplabs!hpfcdc!rjn
From: rjn@hpfcdc.HP.COM (Bob Niland)
Newsgroups: comp.periphs
Subject: Re: 3B2 - HP7750A Woes
Message-ID: <5340001@hpfcdc.HP.COM>
Date: 19 Jan 89 15:33:25 GMT
References: <729@attdso.att.com>
Organization: HP Ft. Collins, Co.
Lines: 11

re: "We're having a peculiar problem with some HP-7550A plotters ...  From
     what I can tell, it appears that the plotter is unable to XOFF the
     computer when its buffer fills up."

> Our plotter settings (from the panel) are:
	...
	Duplex = half
	
This might imply that the plotter will not allow itself to send anything to
the host while the host is talking, including an Xoff.  You might try
duplex=full.  After all, Xon/Xoff is an FDX flow control.