Re: HP 9000 / 710

Hi,
Michael Shalayeff wrote,

> Making, drinking tea and reading an opus magnum from Miod Vallat:
> > > >> OpenBSD/hppa BOOT 0.8
> > > boot>boot
> > > booting dk0a:/bsd: 1589520+2650112+376832=0x663158
> > > SPID bits: 0x0, error = -2
> > > pdc_coproc: 0xc0, 0xc0
> > > WARNING: no HPT support, fine!
> > > [ bsd ELF symbol table not valid: symtab unaligned ]
> > > [ bsd symbol table has bad string table address 0x7fb37c4a ]
> > > [ no symbol table formats found ]
> > >
> > > Here the machine stopps. So I think it is not supported.
> >
> > You're pretty unlucky. 720 goes slightly further, at least to the point
> > where you can play hangman in ddb.
> >
> > > The following systems may eventually work:
> > >
> > >     * PA7000-based machines: 705, 710, 720, 730, 750
> > >
> > > Any chance to get the machine working in the future?
> >
> > I am supposed to be working on this since years, but did not really
> > spend much time on it recently, though I keep tinkering from time to
> > time.
> >
> > > Anything I can do to help?
> >
> > Write correct PCXS tlb handlers - right now the locore code uses the
> > PCXT and up tlb handlers, which are incorrect for this CPU model.
>
> the problem does not seem to be in the tlb handlers as it seems
> since 720 as you said goes into virtual... besides they insert the
> xlations into the right tlbs anyway. there is a need to deal w/
> a split BTLB of course if that's what you mean...

I got another HP Workstation (HP 9000/712/60 (Gecko) PA-RISC 1.1c)
which is working fine. Debian/GNU Linux is booting on the other
machine, so the problem seems to be solvable.

But my assembly skills are very limited, if I get some clue
I can do native compiles on my new machine ;)

Do you think it is worth to look at the Linux kernel code or
is it better to start with the PA-RISC documentation for the
machine?

       bye
                Waldemar

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