Date: Tue, 17 Jan 1995 19:43:11 +1100 From: Bruce Evans <bde@zeta.org.au> To: adhir@bigdipper.umd.edu, hackers@FreeBSD.org, questions@FreeBSD.org Subject: Re: GUS question and LPT question Message-ID: <199501170843.TAA30076@godzilla.zeta.org.au>
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>Second question - I have found that with the following device in my kernel: >device lpt0 at isa? port "IO_LPT1" tty irq7 vector lptintr >I can only print in polled mode - if I switch to interrupt driven mode >(lptcontrol -i) the printer takes hours to print even one small line. >Polled mode, however seems to work OK. Then I noticed a conversation in >which someone stated that we sould not be using irqs for printing at >all. So what should I do - what is the "correct" way to set up my printer? IRQs should be used for printing iff they work. I would like to see the specs for printers that take hours to print a line or page. This is called by the printer acknowledging output more than a few microseconds or nanoseconds before it is ready. Bruce
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