TX errors in eth0 interface

[krose at theory.lcs.mit.edu (Kyle Rose)]

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> > > ne.c:v1.10 9/23/94 Donald Becker (becker at cesdis.gsfc.nasa.gov)
> > > NE*000 ethercard probe at 0x300: 00 40 05 6f 10 32
> > > eth0: NE2000 found at 0x300, using IRQ 9.
> >
> > You didn't install anything on IRQ 2 at the same time as the upgrade,
> > did you?  It sounds like an IRQ conflict, because the NE2000 driver
> > has been extraordinarily stable since a race condition was fixed back
> > in late '94.
> 
> I havn't installed anything thing else. I thought is was using IRQ
> 9.

The original IBM PC was limited to 8 IRQ's, 0-7.  When the PC AT came
out, the designers decided they needed a few more IRQ channels, but
also needed to be backwards-compatible; hence, they just made IRQ 2 --
unused by anything interesting at the time -- a "cascade" for the
IRQ's 8-15: i.e., when any of the IRQ's 8-15 are raised, the processor
is notified by touching the IRQ 2 line.  It's a kludge, and has led to
some very irritating conflicts over the years.

> > cat /proc/interrupts
>            CPU0
>   0:     400788          XT-PIC  timer
>   1:       5369          XT-PIC  keyboard
>   2:          0          XT-PIC  cascade
>   6:         93          XT-PIC  floppy
>   8:          2          XT-PIC  rtc
>   9:          0          XT-PIC  NE2000

So, the 0 here indicates that this interrupt hasn't ever been
tripped.  That's a good sign it isn't working. =)

The root of the problem is most likely very simple, but at this point, 
you're probably better off just moving the card to IRQ 5, 10, or 11 to 
see if it is indeed a problem restricted to IRQ 9.  Let us know what
happens.

Kyle


- -- 
Kyle R. Rose                      "They can try to bind our arms,
Laboratory for Computer Science    But they cannot chain our minds
MIT NE43-309, 617-253-5883             or hearts..."
http://web.mit.edu/krr/www/                           Stratovarius
krose at theory.lcs.mit.edu                              Forever Free
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