[Simh] More VAX 11/750 Testing

[Henry Bent]

Just a quick update: the problem here is definitely the PCS.  When I was
also having problems booting 4.3BSD, I figured out that if I remove
pcs750.bin (the file that the bootloader uses for the microcode updade)
then the system would boot just fine.

-Henry

On 8 July 2015 at 19:30, Henry Bent <hbent at oberlin.edu> wrote:

> First of all, thank you very much to Mark for finding and fixing the uba
> problem with the 750.  Glad that modern Ultrix now works on that simulator.
>
> Now for a new 11/750 issue: Ultrix 1.1.  Before the most recent fix it
> didn't even attempt to boot, and I just figured that bootloader/OS support
> was incomplete.  Now, with the most recent fix, that turns out not to be
> the case.  The kernel loads but stops immediately:
>
> sim> boot rq /r5:1
> Loading boot code from vmb.exe
>
> Boot
> : ra(0,0)genvmunix
> Updating 11/750 microcode ...
> 220688+77372+63260 start 0x1420
>
> HALT instruction, PC: 800001E5 (HALT)
>
> If needed, I put a mostly clean install of Ultrix 1.1 (on a 780) at
> http://occs.cs.oberlin.edu/~hbent/vaxultrix/ultrix11.tar.bz2 .  No root
> password.
>
> On a more general note relating to Bob's recent email, I don't think I
> have the skills to truly adopt a machine within simh, but I can certainly
> do all manner of testing.  I'll try to find some time over the next few
> days to come up with some esoteric corner cases for the 8600 and 750.
>
> -Henry
>
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