[9fans] installing plan9

[Andries Brouwer <Andries.Brouwer@cwi.nl>]

A moment ago I attempted to install Plan 9 on some machine.
It has a NE2000 card.
At the downloading stage, nothing happens, except that it
emits an arp for itself.

Looking at the errata I find "nodummyrr" suggested, but that
makes no difference.

Watching the boot messages more closely, I see that plan9 gets the irq wrong
and assumes irq 9 instead of 3. After adding "irq=3" in plan9.ini I get

  i8259enable: irq 3 shared but not level
  intrenable: couldn't enable irq 3, tbdf 0xffffffff for ether0

Looking in dejanews whether somebody has told how to circumvent
this problem, I only find the same question by Doug Gwyn:

: Unfortunately I'm getting a similar conflict with IRQ 3, which
: in my system is assigned for exclusive use of the 3C509B.
: I assume this is because the installation/resulting Plan 9 systems
: are assuming the existence of 2 serial ports; how do I disable the
: second one (in PLAN9.INI presumably)?

But no answer to this question was given.

Is it possible to install Plan 9 on such a system (using ether0)?