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?
From: cctech <cctech-bounces at classiccmp.org> On Behalf Of Joe Zatarski via
Sent: 16 June 2019 02:33
To: cctech at classiccmp.org
Subject: DEC KA650 VAX memory troubleshooting (video)
I just thought I'd share a video of how I'm going about troubleshooting the
bad DRAMs on my MS650 memory board.
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