On Wed, Jun 19, 2019 at 12:24 PM r.stricklin via cctalk
<[email protected]> wrote:
>
> 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
> <enter> on a restore; sometimes in the middle of the restore, sometimes it
> runs to successful completion.
>
> VMS never boots. Sometimes I get as far as the date prompt (I took out the
> battery), sometimes it gets a little farther, frequently it's before anything
> appears on the console at all.
>
> The exceptions booting VMS occur the same if I attach another disk with VMS
> 5.5 already installed; if I replace the KA630 and M7609 with a KA655 and
> M7622, it all seems to run fine.
>
> The KA630 power-on diagnostics all pass, but... it smells like a memory fault
> to me. What are the odds there could be a memory fault that isn't caught by
> the diags?
>
> ok
> bear.
Maybe try running the MDM (MicroVAX Diagnostic Monitor) diagnostics
and see if they detect any issues that the power-on diagnostics do not
detect.
I have a bootable image of this version, which you should be able to
'dd' to a disk you can then attach to your CMD CQD-220,
uVDOS V4.0 built on 23-mar-1993 12:01
MicroVAX Diagnostic Monitor Release 139 Version V5.0
CONFIDENTIAL DIAGNOSTIC SOFTWARE
PROPERTY OF
DIGITAL EQUIPMENT CORPORATION
Use Authorized Only Pursuant to a Valid Right-to-use License
Copyright (c) 1986, 1994
Digital Equipment Corporation
