>>>>> Kevin Lawton <[EMAIL PROTECTED]> writes:
Kevin>
The problem is that the typical PC architecture maps PCI interrupt
lines to ISA interrupt levels only as a function of the PCI interrupt
number. Non-PC architectures often map PCI to native as a function of
both PCI interrupt number and slot number, allowing up to four
interrupts per PCI slot.
/Magnus
Kevin> FWIW, the PCI idea is pretty cool. Though it was a real big mistake
Kevin> to include interrupt lines (those A,B,C,D lines) as part of the
Kevin> spec. What a mess. When I was reading a PCI book, I thought
Kevin> hey this is a pretty cool architecture until I got to the part
Kevin> where they talked about interrupt lines. WTF? Interrupt
Kevin> handler chaining - did we learn nothing from the past? Then they
Kevin> explain that a newer mechanism was added which doesn't require
Kevin> these. But of course, then you have both mechanisms. This
Kevin> is too familiar to me.
Kevin>
Kevin> Just a dream of mine, but for once I'd like to see a spec
Kevin> for some hardware that was built correctly from day 1. But then,
Kevin> it would naturally support VM'ability, so ...
Kevin>
Kevin> -Kevin
Kevin>
Kevin> --
Kevin> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Kevin> Kevin Lawton [EMAIL PROTECTED]
Kevin> MandrakeSoft, Inc. Plex86 developer
Kevin> http://www.linux-mandrake.com/ http://www.plex86.org/
Kevin>
Kevin>
