DEC KA650 VAX memory troubleshooting (video)

[Rob Jarratt]

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-bounces at classiccmp.org> On Behalf Of Joe Zatarski via
> cctech
> Sent: 16 June 2019 02:33
> To: cctech at 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