[cctalk] Re: Tips on VME board access

On 5 Jun 2023, at 05:04, David Gesswein via cctalk <cctalk(a)classiccmp.org> wrote: Did VME work long ago. We used extender cards to get better access. Sometimes a card didn't like being on an extender. Then we might move it to the end of the card cage and pull the end plate off to get access. Never worked with 3/110. If I remember Sun made some big VME boards. We only used 6U normal depth. Seem to be some extenders on ebay. Cheaper than when new... The ones we used were multilayer boards to try to give better signal integrity. If CPU is slot 1 system controller moving it can cause problems if you are trying to talk to other cards. > On Sat, Jun 03, 2023 at 09:33:03AM -0700, Kurt Nowak wrote: > Hi all, > I have a Sun 3/110 with a faulty video section (hangs at boot when it polls > the FB) and I want to be able to probe and troubleshoot the board. Does > anyone have any tips on how to get at it since it's buried in the VME > chassis. I was thinking of having an extension card made but thought I'd > ask here and see what others have done first. Any thoughts would be > appreciated. Thanks > > -Kurt > > ------------------------------