Jack Carroll wrote:
On Fri, Apr 14, 2006 at 04:18:17PM -0400, Jeff Garzik wrote:
Jack Carroll wrote:
Device server? How about a motherboard that breaks the 16-interrupt
limit of the classic PC? It could use multi-level vectored interrupts,
like
This limit is already long gone. Please read up on PCI Message
Signalled Interrupts (MSI) and PCI MSI-X.
the 68000 on VME bus, which gives practially unlimited interrupts. Then it
could have a whole lot of PCI slots, and the resources to actually use them
in an I/O-heavy application.
Of course, MS wouldn't support all those I/O slots, but do we care?
The standard code in Linux, and very likely Windows, already supports
this sort of thing.
Jeff
????
How do I tell Linux 2.6.15 to assign three PCI Ethernet boards to
interrupts 16, 17, and 18, leaving 5, 9, 10, 11, and 12 free for the ISA
boards?
I've used the phrase "modern PC" at least once. Modern PCs do not have
ISA slots, do have IOAPICs, and do support PCI MSI in some form.
According to "Upgrading & Repairing PCs", 14th edition, page 329,
"For the PCI bus to function in a PC, the PCI interrupts must be mapped to
ISA interrupts." And on page 327, it shows that there are only 16 ISA
I recommend buying the MindShare PCI book.
Jeff
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