Date: Thu, 1 Aug 1996 11:23:43 -0600 (MDT) From: Nate Williams <nate@mt.sri.com> To: Thomas Graichen <graichen@axp5.physik.fu-berlin.de> Cc: nate@mt.sri.com (Nate Williams), hackers@freebsd.org Subject: Re: tcp/ip over lp0 Message-ID: <199608011723.LAA07242@rocky.mt.sri.com> In-Reply-To: <199608011615.SAA01210@mordillo> References: <199607312120.PAA03869@rocky.mt.sri.com> <199608011615.SAA01210@mordillo>
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> > That's a *really* long cable. Also, *MAKE SURE* that neither machine > > has another device using it's interrupt, and that there is a driver for > > all hardware that generate interrupts. > > > > If you happen to use the commonly-used IRQ 7 for the parallel port and > > something other than the parallel port either generates interrupts on 7 > > or one another unregistered port you'll have lots of problems. > > > > Make sure both machines have don't have IRQ conflicts and shorten the > > cable. > > > i tried another shorter cable and it's the same - so it must be the > controller - can some bios settings or things like AUTO_EOI* or > DUMMY_NOOPS have any influence ? The BIOS settings could affect it, but I doubt the kernel setting would. > - as far as i'm aware of all interrupts are correct set (ok i > think nearly all are used - serial: 3,4,9(2), parallel: 7, ethernet: 5, > sound: 11, ide controllers: 14,15 - should'nt i get something like stray > interrups if something is wrong ? will this help you ? The parallel controller would 'swallow' them, so you wouldn't see them, except that lpt0 wouldn't work very well. :( > graichen@mordillo:~> vmstat -i > interrupt total rate > clk0 irq0 212749 99 > rtc0 irq8 272238 127 > fdc0 irq6 1 0 > wdc0 irq14 20300 9 > mcd0 irq10 1 0 > vt0 irq1 9619 4 > sio0 irq4 6251 2 > sio3 irq9 53109 24 > ed0 irq5 1 0 > Total 574269 269 > > there's no irq 7 to see - but i haven't used it until the vmstat - does the > lptcontrol -p/-i affect the lp0 device too or is it always using the interrupt > version ? > > do you have any idea ? - i'll try to experiment further. > > thanks in advance - t > > -- > thomas graichen graichen@mail.physik.fu-berlin.de graichen@FreeBSD.org > > perfection is reached, not when there is no longer anything to add, but when > there is no longer anything to take away antoine de saint-exupery
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