[ale] interrupts in linux??

[Geoffrey]

Christopher Bergeron wrote:
> So then, in theory, I should be able to assign any IRQ that isn't being 
> used (like my floppy ide channel for example), and assign it to one of 
> these devices?

Well, that all depends.  I know that I've had nics that came with a 
program to change the irq and write it to the device.  It would provide 
you a list of available irqs, and it didn't always list all the ones I 
knew were available, so you could be limited in that sense.

I have in the past assigned irg 7 to other devices when I didn't have a 
printer.

> 
> Thanks more..
> -CB
> 
> 
> 
> Geoffrey wrote:
> 
>> Generally, if the device drivers are loaded via a module, you pass it 
>> as an arg to the module (irq=7).  If it's built into the kernel, you 
>> pass it to the kernel on the boot command line, or add it to the boot 
>> loader (lilo,grub) config file.  For lilo, you use the 'append' arg.  
>> I don't know about grub.  I can manipulate some irq assignment via the 
>> bios as well, but that's always looked a lot like black magic, mirrors 
>> and blue smoke to me...
>>
>> Christopher Bergeron wrote:
>>
>>> Not yet, but I'd like to "nip any problems in the bud" if I can.  So 
>>> far, everything is working fine; stress on "so far".  I just 
>>> remastered the box, so I haven't really put it through it's paces 
>>> yet, though...
>>>
>>> How can I change the interrupts that have been assigned?  I'm not 
>>> using a floppy drive at all, so I could steal one from there...
>>>
>>> Any ideas?
>>> -CB
>>>
>>>
>>> Geoffrey wrote:
>>>
>>>> Yes you can, but it depends a lot on the devices themselves and 
>>>> their associated drivers.
>>>>
>>>> I don't know that I'd want to have my nic, sound and vga on the same 
>>>> irq, that would seem to be getting a bit crowded.
>>>>
>>>> So, are you seeing any problems?
>>>>
>>>> Christopher Bergeron wrote:
>>>>
>>>>> Can any hardware guru's tell me if it's okay to share an interrupt 
>>>>> in linux?  I remember back in the DOS/Win days that you couldn't 
>>>>> have a device on the same interrupt (serial ports, etc)...  but 
>>>>> that was back before PCI, PNP, etc...  I've got 3 devices on the 
>>>>> same interrupt as follows:
>>>>> [root at proto1 root]$ lspci -v
>>>>>
>>>>> (edited for brevity)
>>>>>
>>>>> 00:0d.0 Network controller: Harris Semiconductor Prism 2.5 Wavelan 
>>>>> chipset (rev 01)
>>>>>        Subsystem: Unknown device 1737:3874
>>>>>        Flags: bus master, medium devsel, latency 32, IRQ 11
>>>>>        Memory at d8008000 (32-bit, prefetchable) [size=4K]
>>>>>        Capabilities: [dc] Power Management version 2
>>>>>
>>>>> 00:11.0 Multimedia audio controller: Yamaha Corporation YMF-744B 
>>>>> [DS-1S Audio Controller] (rev 02)
>>>>>        Subsystem: Yamaha Corporation DS-XG PCI Audio CODEC
>>>>>        Flags: bus master, medium devsel, latency 32, IRQ 11
>>>>>        Memory at d8000000 (32-bit, non-prefetchable) [size=32K]
>>>>>        I/O ports at d000 [size=64]
>>>>>        I/O ports at d400 [size=4]
>>>>>        Capabilities: [50] Power Management version 1
>>>>>
>>>>> 01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 
>>>>> AGP (rev 04) (prog-if 00 [VGA])
>>>>>        Subsystem: Matrox Graphics, Inc. Millennium G400 MAX/Dual 
>>>>> Head 32Mb
>>>>>        Flags: bus master, medium devsel, latency 32, IRQ 11
>>>>>        Memory at d2000000 (32-bit, prefetchable) [size=32M]
>>>>>        Memory at d4000000 (32-bit, non-prefetchable) [size=16K]
>>>>>        Memory at d5000000 (32-bit, non-prefetchable) [size=8M]
>>>>>        Expansion ROM at <unassigned> [disabled] [size=64K]
>>>>>        Capabilities: [dc] Power Management version 2
>>>>>        Capabilities: [f0] AGP version 2.0
>>>>>
>>>>>
>>>>> Is this okay?  Or do I have a problem here? Thanks in advance for 
>>>>> replies...
>>>>> -CB
>>>>>
>>>>>
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>>>>>
>>>>>
>>>>
>>>
>>>
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>>
> 
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-- 
Until later: Geoffrey		esoteric at 3times25.net

The latest, most widespread virus?  Microsoft end user agreement.
Think about it...

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