Date: Thu, 1 Feb 1996 05:38:35 -0500 (EST) From: Peter Dufault <dufault@hda.com> To: fyeung@fyeung5.netific.com (francis yeung) Cc: questions@freebsd.org Subject: Re: loss of print data during ftp Message-ID: <199602011038.FAA28189@hda.com> In-Reply-To: <199601312036.UAA17754@fyeung5.netific.com> from "francis yeung" at Jan 31, 96 08:36:37 pm
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> I am using Freebsd 2.05. My configuration includes 28.8 modem > to my Internet Service Provider running iijppp. > > Every time when LPD is busy printing and a ftp session is busy > downloading a big file, my printer stops and my printout is all > messed up. The same thing happens when I do WWW browsing while > the printer is printing. Are you running a polled lpt driver? I just saw a similar problem with 2.05-stable on an Asus 486 motherboard (from Rod, I don't remember the exact model). After adding a 1200 baud (!) line to a temperature controller I started losing output to the line printer. By disabling the motherboard parallel port and adding an external one that properly supported interrupts, and enabling interrupts, the problem went away. This is the same system running 4 lines continuously at 115200 on a Boca board with no problem. It was adding the 1200 baud connected to serial port 2 of the motherboard that broke things. It is completely repeatable. -- Peter Dufault Real-Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267
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