Hi, Just a quick question regarding the scope picture. I am new to oscilloscopes and have one Gwinstek, similar to this Rigol. I can measure periodic signals well but have problems setting triggering for these logical signals. How do you set trigger so that you can capture a certain event on these digital lines? Thanks Istvan -------------------------------------------------- From: "A. Fachat" <firstname.lastname@example.org> Sent: Friday, August 29, 2014 12:53 AM To: <email@example.com> Subject: Fat40 RAM problem? > Hi there, > > I've analyzed the RAM problem on my Fat40 a bit more. I've recorded the > broken > addresses - which are stable - and measured the RAM chip in question > (UA16 ) > with the scope. > > See https://www.flickr.com/photos/afachat/sets/72157646409152698/ > > What looks interesting is that the data I/O pins of the RAM even stays > high > when I write a zero into it! I.e. either the RAM is broken and pulls the > line > high, or the driver (or something else) is broken. However, I cannot see > why > the combination of address bits should create a driver failure. Measuring > another chip in the same bank shows the corresponding data line going low > as > it should, as well as the same chip with another address. > > Anyway, I've ordered a 4116 RAM replacement and will replace the chip to > see > how it works out. > > André > > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing listReceived on 2014-09-01 13:00:03
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