[Simh] VMS 7.1 crashes under a simple COPY

[Jeremy Begg]

Hi Francois,

>I did setup a simh 3.8-1 vax simulator that runs under VMS 7.1
>The simulator has 2 disks attached, the system disk, which is a
>4300MB RAUSER  disk, and a data disk that has 44000MB, with a RAUSER type.
>...
>The problem I have is with the rq1 disk, every time I want to do a
>Write access IO, VMS 7.1 crashes.
>If I try the same setup, but with VMS 7.3 as the OS, the write works.
>And, on both simulations, I use the same executable of simh, on the same
>Host (Linux redhat enterprise 5.1 Intel 64bits).

It looks like the UNXSIGNAL crash is a known problem with VMS 7.1 and 7.2. 
The HP web site doesn't let you search it for VAX/VMS V7.1 patches any more,
but the FTP server previously maintained by DEC/Compaq in Sydney still does.

If you FTP to ftp.hp.com.au then drill down to /pub/patches/vms/vax/v7.1
you'll find all the VAX 7.1 patches.  I suggest you download the .README
files and look for UNXSIGNAL.

Regards,

	Jeremy Begg