I have an old CD of QNX-6.2.1 and I was able to install it
under qemu-0.8.0 but had no luck with the networking part.
Qemu uses NE2000 compatible RTL-8029 card emulation and there
is no driver for this in Qnx.
If you look in the helpviewer under ‘ISA’ you’ll find some info on getting ISA cards to work.
The doc’s more or less say you’ll need to specify the IRQ, DMA mode etc when starting the driver. To see how to set those options, look at ‘io-net’ in the helpviewer and then click on ‘devn-ne2000.so’ link.
A number of the NE2000 ISA cards did not have visible dip switches or jumpers. The cards did however come with a DOS program that allowed configuration. I mention this because you might need to configure a card before you get it working.