Date: Fri, 23 Jan 1998 17:48:21 -0800 (PST) From: Tom <tom@sdf.com> To: Bill Rainey <brainey@cisco.com> Cc: hardware@FreeBSD.ORG Subject: Re: Intel Pro 100/B Ethernet card - PCI irq assignment Message-ID: <Pine.BSF.3.95q.980123174749.15593A-100000@misery.sdf.com> In-Reply-To: <199801240140.RAA18281@brainey-ss20.cisco.com>
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On Fri, 23 Jan 1998, Bill Rainey wrote: > > 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. IRQs are assigned by your motherboard. PCI supports IRQ sharing. > 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 > ----------------------------------------------------------------------- > > Tom
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