Date: Thu, 1 Aug 1996 18:15:20 +0200 (MET DST) From: Thomas Graichen <graichen@axp5.physik.fu-berlin.de> To: nate@mt.sri.com (Nate Williams) Cc: hackers@FreeBSD.org Subject: Re: tcp/ip over lp0 Message-ID: <199608011615.SAA01210@mordillo> In-Reply-To: <199607312120.PAA03869@rocky.mt.sri.com> from "Nate Williams" at Jul 31, 96 03:20:38 pm
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hasn't Nate Williams said ? ...
>
> > 4308 packets transmitted, 617 packets received, 85% packet loss
>
> That anything gets through implies that at least the software is setup
> correctly, so the remaining factor is hardware.
>
> > time ago - but now some parts of them have changed - and the cable was
> > different) ? - or can it be that the cable is too long (it's really long -
> > about 5 meters or so) ?
>
> 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 ? - 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 ?
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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