There is no problem when sharing IRQ's if:
-Not ISA.
-Not mobo's serial/parallel (if used), ide's (if used), IRQ0, IRQ1, IRQ2, IRQ6, IRQ8 and IRQ13.
-Software is written for sharing.
See IRQ11:
CPU0
0: 34789 XT-PIC timer
1: 851 XT-PIC keyboard
2: 0 XT-PIC cascade
3: 4 XT-PIC serial
4: 1634 XT-PIC serial
5: 98 XT-PIC serial
6: 13 XT-PIC floppy
7: 26 XT-PIC parport1
8: 2 XT-PIC rtc
9: 8 XT-PIC soundblaster
10: 4 XT-PIC ide3
11: 12785 XT-PIC eth0, uhci, bttv, serial
12: 531 XT-PIC PS/2 Mouse
13: 1 XT-PIC fpu
14: 3889 XT-PIC ide0
15: 8 XT-PIC ide1
NMI: 0
Aditionally, if you use mobo's PS/2 port, you can't share IRQ12.
It is also possible that new mobos could have more IRQ's, or have different design.
----- Mensaje original -----
De: "Jerry Kreps"
Para: "Terry Eck" ; "SuSE"
Enviado: lunes, 03 de diciembre de 2001 2:08
Asunto: Re: [SLE] IRQ question
: On Sunday 02 December 2001 17:18, Terry Eck wrote:
: > Jerry Kreps wrote:
: > > On Saturday 01 December 2001 16:45, Terry Eck wrote:
: > > > My scsi controller and sound appear to share IRQ 11
: > > > while the video card and WinTV card share IRQ 12. Cound this
: > > > be a problem? BTW the motherboard is a Gigabyte GA-7DXR with
: > > > an AMD Athlon chip.
: > > >
: > > > Thanks for any advice
: > > > Terry
: > >
: > > Sharing IRQs is common these days.
: > > Everything works, doesn't it? :)
: > > JLK
: >
: > Hello Jerry,
: >
: > Yes, everything works. However, I have not been able to obtain
: > an uptime of greater then a few days before the system locks up.
: > I thought it might be a conflect between the video card and the
: > bttv card causing the problem. Also, although it seems to work
: > I appear to have enough IRQs where I should be able to use 5, 7,
: > and 9. The printer uses either 5 or 7 so the sound should be able
: > to use the unused of the two. This leaves IRQ 9 should be used
: > by the scsi card leaving IRQ 11 free for use by bttv. If I could
: > figure out how to assign IRQs none of my resources would have to
: > share IRQs.
: >
: > Terry
:
: Terry,
: Look at /etc/modules.conf and use 'man modules.conf' for an
: explaination of it.
:
: Here are my IRQs:
: jerry@jerrykreps:~> cat /proc/interrupts
: CPU0
: 0: 2132446 XT-PIC timer
: 1: 6850 XT-PIC keyboard
: 2: 0 XT-PIC cascade
: 8: 2 XT-PIC rtc
: 10: 27600 XT-PIC EMU10K1
: 11: 23626 XT-PIC eth0
: 12: 658909 XT-PIC PS/2 Mouse
: 14: 31487 XT-PIC ide0
: 15: 26684 XT-PIC ide1
: NMI: 0
: LOC: 2132293
: ERR: 720
: MIS: 0
: jerry@jerrykreps:~>
:
: And IOPORTS
: jerry@jerrykreps:~> cat /proc/ioports
: 0000-001f : dma1
: 0020-003f : pic1
: 0040-005f : timer
: 0060-006f : keyboard
: 0070-007f : rtc
: 0080-008f : dma page reg
: 00a0-00bf : pic2
: 00c0-00df : dma2
: 00f0-00ff : fpu
: 0170-0177 : ide1
: 01f0-01f7 : ide0
: 02f8-02ff : serial(auto)
: 0376-0376 : ide1
: 0378-037a : parport0
: 037b-037f : parport0
: 03c0-03df : vesafb
: 03f6-03f6 : ide0
: 03f8-03ff : serial(auto)
: 0cf8-0cff : PCI conf1
: 4000-40ff : PCI device 1106:3057
: 5000-500f : PCI device 1106:3057
: 6000-607f : PCI device 1106:3057
: c000-cfff : PCI Bus #01
: c000-c0ff : PCI device 1002:5246
: d000-d00f : PCI device 1106:0571
: d000-d007 : ide0
: d008-d00f : ide1
: dc00-dc1f : PCI device 1102:0002
: dc00-dc1f : EMU10K1
: e000-e007 : PCI device 1102:7002
: e400-e47f : PCI device 10b7:9200
: e400-e47f : 00:0b.0
: jerry@jerrykreps:~>
:
:
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