[Simh] Unix V7 for PDP11

[SP]

This is what I think, but it don't works. I'm almost sure this is a matter
of addressing or so, but the lack of the /usr/sys directory tree in the V7
software kit available for SIMH don't let me to do some probes more
advanced.

This information is available in the classic paper from the Unix
Programmer's Manual vol.2, names "Setting Up Unix-Seventh Edition", in the
paragraph named "Reconfiguration". It speaks about the device drivers by
default in Unix V7, begin these:

* DC11 - Support 4 lines
* DH11 - Handle 3 DH11's with a full complement of 48 lines
* DN11 - Can Handle 4 DN's
* DU11 can handle one DU
* KL/DL driver can handle one single DL11-A, B or C, and no DL11-E's

To change these, you must edit, in the directory /usr/sys/dev, the source
files for these device drivers, in essence dc.c, dh.c, dn.c, kl.c.

Exists one image disks of V7 in TUHS with some hacks, and this includes the
sys source code. I can't compile it because is fault of the tty.c module.
But is interesting to see one dz.c module in the /usr/sys/dev directory.

I shall put some time in the effort to check this, but other hands in the
task would be helpful and agreed. With the level actually reached by the
SIMH simulator for PDP11 is a real pity don't have one real Unix V7
multiuser and multitasking running by there.

Next chapter could be to check the UUCP connections between two V7 systems
running... :-)

Cheers
Sergio

----- Original Message -----
From: [GNC] Andreas Cejna <andreas.cejna at gnc.at>
To: Kevin Brunt <k.brunt at ccs.bbk.ac.uk>
Cc: <simh at trailing-edge.com>
Sent: Tuesday, August 10, 2004 5:07 PM
Subject: Re: [Simh] Unix V7 for PDP11


> Hi,
> In SIM V3.2-1 support for DHQ11 was added. Is this the module you're
> talking about?
> Regards
> Andreas
> >
> > On Mon, 9 Aug 2004 09:04:24 -1000 (HST) Tim Newsham <newsham at lava.net>
> > wrote:
> >
> >
> >> It's been a few months, but if I remember correctly the extra tty
> >> hardware in simh (dz?) is not supported by v7.  There was a driver
> >> in v7 but it has some comments to the effect that the driver is
> >> not in working order.  I stuck to using the console.
> >
> > This is, of course, a reflection on the DZ11 still being rather
> > new-fangled when Unix V7 was 'issued'. Bell Labs had been using DH11's,
> > so the distribution supported them 'out of the box'.
> >
> > Rather than trying to fix the V7 DZ11 code, it would be easier to add
> > support to SIMH for one of the terminal devices that V7 did support,
> > namely the DH11 and DC11 multiplexers, or what might be easier,
> > multiple DL11 lines, which would just(!) need a 'stretched' version of
> > the console TTY support.
> >
> > The other way round would be to track down a V7 'sub-species' that did
> > have DZ support. They existed - I used to look after a system that ran
> > the Heriot-Watt 'small system' code, but although I've got the 11/44
> > processor. I didn't manage to get the distribution tapes, unfortunately.
> >
> > Kevin
> >
> > ----------------------
> > Kevin Brunt
> > Birkbeck College London
> >
> > _______________________________________________
> > Simh mailing list
> > Simh at trailing-edge.com
> > http://mailman.trailing-edge.com/mailman/listinfo/simh
> >
>
>
>
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