Messages in this thread |  | | From | Ricky Beam <> | Subject | Re: Interrupt sharing. | Date | Thu, 13 Feb 1997 20:23:45 -0500 (EST) |
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Letting the chips far where they may, I quote Steven N. Hirsch: >If memory serves, the kernel could care less how many devices share an
Well, actually it can... if I remember correctly, the driver can request that it be the only driver for the IRQ. But I've not looked at that stuff for eons (in the Linux time continium.)
>But, if multiple cards all try to activate one interrupt with multiple >drivers - look out! Without getting into the issues of tri-stated busses, >edge-triggered vs. level-triggered, etc, it simply won't work.
Suffice it to say you run the rick of letting the smoke out of the chips.
>PCI, EISA and MicroChannel will cheerfully support interrupt sharing.
"Support" and "funtionality" are two different things... #9-771 and any other device can generally support shared PCI-IRQs, but it tends to lock up the machine under certain conditions (read: dragging large full-speed animations around the screen... Mod4Win keeps on playing tho' :-))
--Ricky
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