[Simh] Problem booting RSX11M on pdp11 (halt at loc 0)

[Phil Fisher]

Further to recent communications on this topic (for which many thanks to those persons) and some thinking I have a potential/possible reason that I would like comments on.

My thinking goes that if in the virtualisation setup I have the "disk" is not responding quickly enough for the RL driver in SimH then maybe it will return a buffer of zeros.

Now even if I am on the right track for this, it leaves some questions (in no particular order):

a) others have reported being able to use SimH 4.0  under virtualisation with no issues although not with RSX11M.  So why would I be different?
b) I would have thought that the driver for RL especially as it is emulating hardware would not "timeout" so quickly.
c) If it did timeout, why have I not seen an error message?  Maybe I need to look somewhere else ... hmm.

And the obvious statement that I am completely wrong and it is something I have configured incorrectly either in the virtualisation environment (except it gives same error under both Virtual Box and VMware Workstation) or in SimH.

Phil


----- Original Message -----
From: Mike Stramba <mikestramba at gmail.com>
Reply-To: <mikestramba at gmail.com>
To: Phil Fisher <phil.fisher at peejayeff.co.uk>
Cc: <simh at trailing-edge.com>
Sent: 22/03/2018 21:04:56
Subject: Re: [Simh] Problem booting RSX11M on pdp11 (halt at loc 0)
________________________________________________________________________________

Phil,

I assume this is the site ? :

http://home.earthlink.net/~n1be/pdp11/PDP11.html

I'm downloading it now will try it on my Win7 laptop.

Have tried / been successful running it on a "native" O.S (not under
VmWare or VirtualBox ?)

I.e  is the point to try to get it running under VmWare / Vbox .. or
just it running period ? ;)

Mike

On 3/22/18, Phil Fisher <phil.fisher at peejayeff.co.uk> wrote:
>
> I have checked up some information and found the following. (if anyone wants
> to see the INI file or the disk image I can send that directly as a 7zip
> file).
>
> Looking at the dump of the disk file it looks like a valid boot block
> although (as below from offset 0):
>
> 0000000  000240  000406  000000  002467  000000  000000  000000  000000
>
> 0000010  012704  001000  ...
>
> suggesting a code start of:
>
>     NOP
>     BR 1$
>     .word 0
>     .word 02467
>     .word 0
>     .word 0
>     .word 0
>     .word 0
> 1$: MOV #1000,R4
>     ...
>
> all values in octal.
>
> So to me this looks at least sensible.  Alas I cannot recall what the old
> RK05 boot block looked like for comparison as I was at one time VERY
> familiar with that.
>
> So my thoughts are that BOOT is broken somehow or I have majorly screwed up
> the INI file.
>
> Phil
> --
> Phil J Fisher           phil.fisher at peejayeff.co.uk
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