On Saturday 09 April 2016 00:14:37 Jon Elson wrote: > On 04/08/2016 09:53 PM, Jon Elson wrote: > > Slight correction. (I had a bad scope probe.) After fixing > that, I see that I AM getting the board to respond with > WAIT/, so that explains the really short strobe cycles. So, > the bus handshakes seem to be working, but all read commands > seem to return FF, no matter what is being sent by the > target board. I'll set up the logic analyzer tomorrow and > get more detailed traces of what is going on. > > I'm pretty stumped. > > Jon
As possessor of a couple 100+ megahertz dual trace scopes, I have found the probes that MPJA.com sells for under a $20 bill each to be serviceable and a lot more ruggedly built than the stuff tek (or anyone else I have sampled) sells. And the price is right too. Seeing a 10 ns wide spike in all its ugly glory, with the only ringing being a direct consequence of the length of the ground lead has found me a lot of logic errors since I bought the first Hitachi V-1065 25 years ago. I bought a digital sampler with similar specs 3 years back and I am still learning how to use it. The ability to see that errant spike in a full brightness capture is quite informative. And with a 7" display, it still doesn't take up the whole work table. <http://www.mpja.com/200MHz-Oscilloscope-Probe/productinfo/15087+TE> I keep at least one spare on hand. Since both scopes can take separate trigger inputs, I keep 3 probes with each one. > ---------------------------------------------------------------------- >-------- Find and fix application performance issues faster with > Applications Manager Applications Manager provides deep performance > insights into multiple tiers of your business applications. It > resolves application problems quickly and reduces your MTTR. Get your > free trial! http://pubads.g.doubleclick.net/ > gampad/clk?id=1444514301&iu=/ca-pub-7940484522588532 > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! http://pubads.g.doubleclick.net/ gampad/clk?id=1444514301&iu=/ca-pub-7940484522588532 _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
