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List:       freebsd-hackers
Subject:    Re: tcp/ip over lp0
From:       Thomas Graichen <graichen () axp5 ! physik ! fu-berlin ! de>
Date:       1996-08-01 16:15:20
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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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