[Simh] THE SOULTION - Segmentation fault when running the MIcrovax emulator

[brian]

Thanks to those others who tried to help, but Mark Pizzolato managed 
to get to the bottom of it all.

It seems that most of the problem was outdated documentation. I was 
still trying to use the libpcap from tcpdump, as recommended by Phil 
Wherry's writeup.

At Mark's suggestion, and with the latest version of his code, I 
downloaded the libpcap from the repositories, removed the USE_NETWORK 
switch when building SIMH, switched to using the inbuilt TUN/TAP 
business, and everything now builds correctly and gets past the point 
at which SIMH was crashing.

There should maybe be a note placed prominently on the front page of 
the SIMH website warning that Phil Wherry's writeup is now incorrect 
in some respects?


Brian.


On 01/06/2012 06:55 PM, brian wrote:
>
> Returning to SIMH for the first time in quite a while, I decided to
> set things up from scratch again, mainly because I can't remember what
> I did previously. :)
>
> I'm using Linux Mint 9 64-bit (based on Ubuntu 10.04). I did
> previously have the Microvax emulator working, but it was under either
> Windows XP or some 32-bit version of Mandriva, can't remember which.
>
> Anyway, I downloaded, unpacked and compiled the latest sources, which
> seemed to go OK, no errors as far as I could see. I've been following
> Phil Wherry's instructions, so I started out with the following as my
> vax.ini (please assume all the paths are correct, I've checked and
> double-checked them, and there's a link to vax.ini from the directory
> with the compiled program)
>
> load -r /home/brian/vax/data/ka655x.bin
> attach nvr /home/brian/vax/data/nvram.bin
> set cpu 512m
> set rq0 ra92
> set rq1 ra92
> set rq2 ra92
> set rq3 cdrom
> attach rq0 /home/brian/vax/data/da0.dsk
> attach rq1 /home/brian/vax/data/da1.dsk
> attach rq2 /home/brian/vax/data/da2.dsk
> attach -r rq3 /home/brian/vax/data/vms073.ISO
> set xq mac=00-1C-25-EA-22-09
> attach xq eth0
> set cpu conhalt
> boot cpu
> exit
>
> Running the program (as root) produced the following output
>
>
> VAX simulator V3.8-1
> NVR: creating new file
> NVR: buffering file in memory
> RQ: unit is read only
> Segmentation fault
>
> The three files for the disks were all created and of zero length.
>
> Looking in my old setup, I saw that when I had a CD image attached, I
> had the CD device defined as an rrd40, so I gave that a try, deleting
> the three files and nvram.bin. Nope, same results.
>
> I'm sure I'm doing something stupid, but it's been almost 30 years
> since I used VMS for real, and my C programming is non-existent.
>
> Can someone try to point me in the right direction?
>
>
> Thanks,
>
> Brian.
>
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