Re: CMD MSCP SCSI problems? (again?)

[Johnny Billquist <bqt%softjar.se@localhost>]

On 2023-02-01 21:00, Johnny Billquist wrote:
> On 2023-02-01 20:55, Anders Magnusson wrote:
> > Den 2023-02-01 kl. 20:40, skrev Johnny Billquist:
> > > On 2023-02-01 20:34, Dave McGuire wrote:
> > > > On 2/1/23 14:10, Johnny Billquist wrote:
> > > > > I have some vague memory that with enough memory, controllers 
> > > > > didn't get detected. How much memory do the 4000-705A have?
> > > >
> > > >    It has 128MB.
> > >
> > > Yeah. That rings bells for me. I think with MSCP I noticed failures 
> > > with more than 64MB. I think it is even visible using simh.
> > How do you reproduce that?
> > I just checked, no failure.
>
> [...]
>
> I was sure I saw it before, but when I tried now, it was fine...

And things are a bit weird still, but not the way I remembered it from 
the past.

With a simh VAX-8650 with 256 megs, it works fine.
However, with 128 megs, it crashes during startup.
With 64 megs, it works fine.


And the only difference in my config for simh is the amount of memory. 
Everything else identical, using the same disks, and so on.

With 128 meg:

Updating motd.
Starting ntpd.
Starting sshd.
[ 326.2630040] r0=80808140 r1=00000000 r2=806de000 r3=00000001 
r4=00000000 r5=00000000 r6=806de008 r7=00000000
[ 326.2630040] r8=00000000 r9=8b895cec r10=806de008 r11=00000001
[ 326.2630040] ap=8b895cc8 fp=8b895ca0 sp=7ffff7f4 pc=80173318
[ 326.2630040] panic: SEGV in kernel mode: pc 0x80173318 addr 0x10
[ 326.2630040] cpu0: Begin traceback...
[ 326.2630040] panic: SEGV in kernel mode: pc 0x80173318 addr 0x10
[ 326.2630040] Stack traceback :
[ 326.2630040]   Process is executing in user space.
[ 326.2630040] cpu0: End traceback...

[ 326.2630040] dump to dev 9,1 not possible
Loading boot code from internal vmb.exe
Rebooting...


  Johnny

--
Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: bqt%softjar.se@localhost             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol