Re: current won't boot on real 4000/60

On Tue, 2026-03-10 05:24:24 -0700, Jason Thorpe <[email protected]> wrote:
> > On Mar 10, 2026, at 1:55 AM, Jan-Benedict Glaw <[email protected]> wrote:
> > Just a short heads-up: I've been doing a lot of rework on my testing
> > setup lately and noticed that current VAX install ISOs won't boot on a
> > real 4000/60. Further testing: It still boots in SIMH-vax
> > (= microvax3900), but also fails with SIMH-vaxstation4000m60 and a
> > usual 80 MB configuration. "Failing" means to lock up right after
> > printing out the machine type. (SIMH-vaxstation4000m60 will print two
> > additional lines about the installed memory and lock thereafter.)
> > Tracked it down to "extent(9) -> vmem(9)" patch from November last
> > year (reverting helps), but we don't have a fix yet.
> 
> The one in machdep.c?

Exactly that one.  (Dropped you an email about that privately a few
days ago, that contains some more details and an Open-SIMH config for
the vaxstation4000m60 simulator.)  But unfortunately I'm not yet there
to really have a look at it, still fixing other issues with my overall
test setup.

MfG, JBG

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