That is really interesting, sadly I don't have quite as much gear as you, I only have a basic logic analyser, but I am not currently trying to fix a MS650 memory board. You mentioned a KA650 architecture manual and you had a PDF of it in the video. I couldn't find it on Manx? Where can I find it?
Thanks Rob > -----Original Message----- > From: cctech <cctech-boun...@classiccmp.org> On Behalf Of Joe Zatarski via > cctech > Sent: 16 June 2019 02:33 > To: cct...@classiccmp.org > Subject: DEC KA650 VAX memory troubleshooting (video) > > Hey Everyone, > > I just thought I'd share a video of how I'm going about troubleshooting the > bad DRAMs on my MS650 memory board. > > https://youtu.be/eDMhdAEFEgc > > I apologize for the shaky-cam, I don't have a tripod, and I needed to do a lot > of panning anyway. > > I will be sharing my notes on the MS650 once I have a chance to write them > up properly as well. I wasn't able to find a printset for the RAM card > itself, so I > assume one doesn't exist in digital form yet. I have documented what bit and > memory range each DRAM on the card corresponds to, which may help > someone troubleshooting in the future > > Regards, > Joe Zatarski
