Sebastian Kuzminsky wrote: > Jeff Epler wrote: > >>On Mon, Aug 25, 2008 at 09:01:27PM -0500, Jon Elson wrote: >> >>>This is the parallel port (EPP) version. >> >>With at least a few systems, the problem goes deeper than this: the FPGA >>firmware is programmed each time over the parallel-port in SPP mode. >>One machine we had at CNC Workshop wouldn't even complete this step >>successfully with the example "blink the LED" FPGA firmware. > > > The Mesa 7i43 is similar to the Pluto-P (ie, FPGA with EPP), but > slightly more expensive and slightly more capable. > > It's been working well for me once I got a good EPP cable. I dont think > it's been widely deployed yet, so reliablity figures are not really > available. > > Oh, yeah, none of this stuff will work worth a DARN without a good IEEE-1284 cable. Even if you bullet-proof your FPGA logic, the computer needs to be able to sense the WAIT/ signal reliably, and ordinary printer cables have way too much crosstalk.
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