Re: stuff for sale - recent move

2020-03-03 Thread Joe Zatarski via cctalk
> > On Sun, 1 Mar 2020 at 17:58, Joseph Zatarski via cctalk > wrote: > > > > I've started inventorying a lot of the stuff I'd like to pass on here: > > > https://docs.google.com/spreadsheets/d/19vhF-o6vx9g7l-D8cvLJ5OPJzpdmU9PTTknbxY-mY58/edit?usp=sharing > > I can't see these in the Google sheet,

vaxstation ii machine check & diags efficacy

2019-06-19 Thread Joe Zatarski via cctalk
> It's a VAXstation II/GPX. I'm trying to install VMS 5.5 (from CD if it matters; there is a CMD CQD-200 or -220 as the only storage controller) and routinely getting machine check exceptions. > > Standalone backup always boots. Sometimes I get an exception the moment I hit on a restore;

Re: DEC KA650 VAX memory troubleshooting (video)

2019-06-17 Thread Joe Zatarski via cctalk
OK, so where should a thing like this go: https://pastebin.com/taQwaTV6 Anybody got a decent place to upload that? it's my notes on the MS650-AA, and more generally the KA650 CMCTL memory subsystem. Includes my theory of operation of the CMCTL, the organization of memory, the ECC equations

Missing posts in archive and no Subject: line

2019-06-17 Thread Joe Zatarski via cctalk
> So, a couple of posts yesterday did not show up in the date archive: > > http://www.classiccmp.org/pipermail/cctalk/2019-June/date.html > > which is how I read the list. They are: > > Software for Fairy YL-23 IC tester wanted >

Re: DEC KA650 VAX memory troubleshooting (video)

2019-06-16 Thread Joe Zatarski via cctalk
sorry, the technical manual actually, which has an architecture *chapter* http://www.bitsavers.org/pdf/dec/vax/650/ The idea, eventually, is that I will publish my notes so that you wouldn't need the logic analyzer, at least for the 8MB board. I just had it hooked up, so I demoed it. The notes

DEC KA650 VAX memory troubleshooting (video)

2019-06-16 Thread Joe Zatarski via cctalk
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