On Saturday 01 July 2006 10:37, Dieter wrote: > > no, itآ�s not the problem to have Eth ports on the PC side, as you notice > > yourself _Dieter_ even low-end PC privide one port. > > Rather, a chip on the PCآ�s mobo which route the PCI signal through > > Ethernet. > > (and on the monitor g-card, the contrary, though it could be not > > necessarly to bother with a PCI slot, as you suggest) > > Oh! I think I *finally* understand what you want. A PCI slot extender > that uses Ethernet for the link. Interesting idea. I don't know of such a > device. Anyone? The closest thing to this that I know of is a device for > adding more PCI slots or adding PCI slots to laptops. It looks like the > cable is limited to 1.5 meters. It is also expensive. For most purposes > one might as well buy an additional computer instead. > > http://www.mycableshop.com/sku/PCI-P7T.htm > > It might be that the PCI bus has timing/latency requirements that prevent > a remote slot over a long cable? >
How long a cable do you want? The pSeries (IBM rs6000) have remote IO drawers that attach via ahigh speed serial cable. The drawers house anything up to about 10 PCI slots. The cables can get pretty long (i.e. in another rack, which means a few metres. I guess the specs would be online somewhere on IBM's website. probably the cabling & devices manual. I think the trick is that you don't need to extend the PCI bus itself. You actually need a PCI Bridge that happens to have it's two halves at a distance from each other. Now whether you can chain a PCI bridge off a PCI slot is another matter. I don't know if you can. So I may just be flapping my jaw here... (IRQ's would be a limitation wouldn't they?) Hamish.
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