[Simh] VMS 4.x crashing on every other boot

[Hittner, David T.]

The first thing VMS does after printing the version is go into the
hardware detection phase, so the MUP may have added a more rigorous test
for some piece of hardware that SIMH is not not simulating perfectly (or
is simulating too well :-).

You might try reducing the attached devices in SIMH to the bare minimum
and see if you can figure out which device is hanging the simulator.

If you get it down to just the primary disk drive and it's still
hanging, try installing VMS on a different type of disk drive and/or a
different type of disk controller.

Dave 

> -----Original Message-----
> From: simh-bounces at trailing-edge.com 
> [mailto:simh-bounces at trailing-edge.com] On Behalf Of Andrew Warkentin
> Sent: Tuesday, March 11, 2008 6:28 AM
> To: simh at trailing-edge.com
> Subject: [Simh] VMS 4.x crashing on every other boot
> 
> I have tried to run VMS 4.4 and VMS 4.6 under the VAX/11-780 
> simulator. 
> It boots properly every time without the mandatory update 
> installed, but it hangs after the system version have been 
> printed on the console the first time it is booted after the 
> mandatory update has been installed.
> 
> If it is rebooted, it boots properly, but it continues to 
> alternate between hanging and booting properly on successive 
> boots. I am not sure if this is a SIMH bug, or if I have 
> misconfigured VMS (but I just went with the default install 
> and did not change any configuration). It is kind of weird 
> that it starts hanging only after the mandatory update has 
> been installed.
> 
> VMS 3.0 (in the VAX-11/780 simulator), VMS 5.5, and VMS 6.2 
> (both in the MicroVAX 3900 simulator) boot properly every time.
> 
> (I asked about this a long time ago on this list, but got no 
> response).
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