[Simh] Booting the vax750 simulator.

[Mattis Lind]

2015-07-08 20:33 GMT+02:00 Ethan Dicks <ethan.dicks at gmail.com>:

> On Wed, Jul 8, 2015 at 2:24 PM, Clem Cole <clemc at ccc.com> wrote:
> >> > Definitely try a different disk.  UNIX device drivers do not use the
> >> > hardware the same way that VMS drivers do.
> >> >
>
> My words, I think...
>
> >> The VAX 750 UBA Buffered Data Path CSRs hadn't been implemented in the
> >> original VAX 750 simulator and Matt's testing probably only was done on
> VMS.
> >
> > I'm amaze it was not found by now.   Amazing..
>
> I'm not surprised at all.  It just took a case to expose the
> difference and some persistent sleuthing.  Well done, all!
>
> >>
> >> They are now implemented and Ultrix boots just fine.
> >
> > Thank you!!
>


Thanks a lot!

Very well done Mark!

/Mattis



>
> Yes, indeed.  Thanks to all who put some work into this.  Next: why
> doesn't the RB80 boot 4.3BSD on a 11/730?   (if anyone wants to tackle
> it, I'm happy to share my findings to date.  I hit a wall due to my
> own limitations of understanding of the original hardware).
>



> -ethan
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