[Simh] Install of VMS4.6 on VAX 780 crashes

[Jarratt RMA]

If you are working from the same media I have, then I think the 4.6 media
are an upgrade only and you will need to install an earlier version first. I
think I installed 4.0 first.

Regards

Rob

On 27 December 2010 12:30, Peter Allan <petermallan at googlemail.com> wrote:

> I have managed to get hold of some versions of VMS, mostly VMS 4.X and I am
> trying to install VMS4.6 on an emulated 780 using simh.
>
> The sequence I have followed is:
>
> Boot using the VMS 7.3 CD
>
> Run BACKUP to copy the REQUIRED saveset from the VMS 4.6 emulated tape to
> an RA81 disk with the command
>    BACKUP/VERIFY  MTA0:REQUIRED/SAVE  DUA0:
>
> However, when I boot from the RA81, expecting the installation sequence to
> continue, I get
>
>    VAX/VMS Version  KG  15-Jun-1987 10:00
>
>
> **** FATAL BUG CHECK, VERSION =  KG  INVEXCEPTN, Exception while above
> ASTDEL or on interrupt stack
>
>     CURRENT PROCESS = SWAPPER
>
>     REGISTER DUMP
>
>         R0 = 00000008
>         R1 = 04080000
>         R2 = 00000000
>         R3 = 00000000
>         R4 = 80002748
>         R5 = 00000000
>         R6 = 00000000
>         R7 = 00000000
>         R8 = 00000000
>         R9 = 00000000
>         R10= 00000000
>         R11= 00000000
>         AP = 00000000
>         FP = 00000000
>         SP = 801F91D0
>         PC = 80004862
>         PSL= 04080009
>
>     KERNEL/INTERRUPT STACK
>
>         801F91D8  00000004
>         801F91DC  00000000
>         801F91E0  FFFFFFFD
>         801F91E4  00000000
>         801F91E8  00000000
>         801F91EC  00000001
>         801F91F0  00000003
>         801F91F4  00000454
>         801F91F8  8000A71B
>         801F91FC  04080000
>
> Reboot requested, PC: 80158B91 (HALT)
>
>
> Has anyone any idea what is going wrong?
>
> I successfully installed VMS 7.3 from the CD on the 780. Experiments give a
> similar crash when running VMS 7.3 if I have too little memory on the 780
> (less than 32MB), but no fiddling with the amount of memory seems to help
> with VMS 4.6.
>
> I think someone out there has VMS 4.6 running, so I trust it is possible
> and I am doing something silly.
>
> Peter Allan
>
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