Path: news.mitre.org!blanket.mitre.org!philabs!newsjunkie.ans.net!newsfeeds.ans.net!news-was.dfn.de!news-kar1.dfn.de!news-fra1.dfn.de!Cabal.CESspool!bofh.vszbr.cz!nntprelay.mathworks.com!newsfeed.internetmci.com!192.220.251.22!netnews.nwnet.net!news.microsoft.com!news From: "Paul Sanders" Newsgroups: comp.os.ms-windows.programmer.nt.kernel-mode Subject: Re: Parallelport using interrupts Date: Tue, 2 Dec 1997 10:00:38 -0800 Organization: Microsoft Lines: 33 Message-ID: <661iir$emn@news.microsoft.com> References: <661b1l$g5d$1@news.fhg.de> NNTP-Posting-Host: 157.54.178.80 X-Newsreader: Microsoft Outlook Express 4.71.1712.3 X-MimeOLE: Produced By Microsoft MimeOLE V4.71.1712.3 A printer. The parallel driver is one of the few drivers that operates in polled mode when it is capable of operating in interrupting mode. At first glance this seems counter productive. The reason is that many printers cause interrupts in a somewhat non-standard fashion. This made it a real pain to write a good consistent interrupt handler for the parallel driver. As I recall the straw that broke the camel's back was that every time one of the principal archtitects of Windows NT tried to print, his mouse became very jerky until the print job was completed. There were so many interrupts and DPC's being generated that USER could not move the mouse. Thus, the polled version of parallel (which is installed by default). -Paul Tony, did I get this all right??? :-) Frank Winkler wrote in message <661b1l$g5d$1@news.fhg.de>... >Hi folks, > >once again a "simple" Problem: I found in the ddk-examples >comm/parsimp, where interrupts can be "used". Does anybody >know, where I can find an example, which uses this driver ? > >TNX, >Frank. > > > > >