Chris Radek wrote: > On Wed, Dec 03, 2008 at 09:48:18PM -0600, Jon Elson wrote: > >> Peter C. Wallace wrote: >> >>> As I said before maybe the way to ease into this is just support 1 or a few >>> Ethernet chips, and require the user to have a add-in PCI/PCIe Ethernet card >>> with the required chip. >>> >>> >> Having fought this problem to some extent with the par port, I can't >> IMAGINE the headache when a potential customer shows up and you tell him >> "Oh, it only works on computers with a DEC Tulip ethernet chip." Add, >> he says, "How do I tell, sight unseen, whether any particular computer >> has that specific chip?" >> No, it has to have a bit wider hardware support to be viable. >> > > > I think the answer is explicitly in what Peter said above. You don't > care what comes in the computer. You point them to a particular > network card because it has the right chipset. It'll be about $5. > Heck, you might say, as someone who sells hardware that works with it, > you'll just send him one off your stack of them. They're $5, after > all. > I don't know where to get NEW net cards for $5. All this commodity stuff has gone up in price. Maybe if I contract with a Chinese manufacturer to take 1000 of them I can get them that cheap. Also, there's the PCI vs. PCE-e transition, already well in progress. So, I'd have to have some of both. But, that wouldn't be so bad. Also, forceing the user to add a 2nd ethernet solves the "how do we deal with being on the network at the same time as coexisting with the rt-ethernet function." This makes a lot of sense. So, does anyone know it there is a dumbed-down network protocol stack for real time? By "dumbed-down", I mean that it just does what any ordinary ethernet stack does, without adding any special functions, like time slots for each sender.
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