> I install OpenBSD on my Fastwell CPB905 Singleboard compter. IT have
> 4-RS-232 port on same IRQ, but on different address on isa bus. Then i
> setup only one port using configure command all ports work normally. But
> when i setup 2 of them in one boot configuration i get in dmesg: irq
> already in use. I found next thing in OpenBSD 3.8. documentation:
OpenBSD 3.8? You are on your own.
> ISA devices can not share IRQs. If you find ISA devices sharing IRQs, you
> must correct this problem.
>
> But how it works on Linux & QNX?
By making significant and serious compromises.
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