From owner-freebsd-hardware  Fri Jan 23 17:41:23 1998
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Date: Fri, 23 Jan 1998 17:40:38 -0800
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From: Bill Rainey <brainey@cisco.com>
To: hardware@FreeBSD.ORG
Subject: Intel Pro 100/B Ethernet card - PCI irq assignment
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I've installed a EtherExpress Pro 100/B card and the system seems to be
running fine with it but I have a question about the way IRQs are
assigned for PCI devices.

I noticed after I config'd the kernel and installed the card that fxp0
was sharing IRQ 11 with the WinCast/TV and the Matrox Millenium
cards. It this reasonable (a feature of the PCI bus) or should it
really have its own IRQ ? How is IRQ assignment done for PCI cards ?
As I said, it seems to work okay so far.

Thanks,
Bill Rainey

-----------------------------------------------------------------------
  FreeBSD 3.0-CURRENT #0: Fri Jan 23 03:36:15 PST 1998
      brainey@avatar.cisco.com:/src/current/sys/compile/AVATAR
  CPU: Pentium Pro (199.43-MHz 686-class CPU)
    Origin = "GenuineIntel"  Id = 0x616  Stepping=6
    Features=0xf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV>
  real memory  = 134217728 (131072K bytes)
  avail memory = 127897600 (124900K bytes)
  Probing for devices on PCI bus 0:
  chip0: <Intel 82371FB PCI to ISA bridge> rev 0x02 on pci0.2.0
> bktr0: <BrookTree 848> rev 0x11 int a irq 11 on pci0.6.0
  Hauppauge WinCast/TV, Philips NTSC tuner, dbx stereo.
> fxp0: <Intel EtherExpress Pro 10/100B Ethernet> rev 0x02 int a irq 11 on pci0
  .10.0
  fxp0: Ethernet address 00:a0:c9:8e:ed:19
> vga0: <Matrox MGA 2064W graphics accelerator> rev 0x01 int a irq 11 on pci0.1
  2.0
  ahc0: <Adaptec 2940 Ultra SCSI host adapter> rev 0x00 int a irq 10 on pci0.14
  .0
  ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
-----------------------------------------------------------------------