[Simh] tty magic(?) for talking to bootloaders?

[Tom Perrine]

FANTASTIC!

That's exactly the thing I needed. The rest has been ugly shell coding and
weird old-school UNIX tricks (my first UNIX was PWB!).

Here's an example:

To configure (edit source code) and compile df.c to know about the rk disks
you would normally do this:

# chdir /usr/source/s1
# ed df.c
/rp0/d
.-2a
  "/dev/rk0",
  "/dev/rk1",
.
w
q
# cc -s -O df.c
# cp a.out /bin/df
# rm a.out

Instead I have to do this to get around the fact that V6 UNIX echo doesn't
interpret \nnn or anything else:
>
>
> expect '#' send 'cc -s -O df.c ; cp a.out /bin/df ; rm a.out\r' ; continue
>

expect '#' send 'echo \'/rp0/dX.-2aX  "/dev/rk0",X  "/dev/rk1",X.XwXqX\' |
> tr X \\\\012 | ed df.c \r' ; continue


Thanks!  In the past few hours I've completely scripted everything from the
initial tape boot through customizing and building a new kernel, loading
the extra filesystems, activating the ttys and inbound TELNET, and I'm DONE.

--tep


On Mon, Sep 23, 2019 at 6:42 PM Richard Cornwell <rich at sky-visions.com>
wrote:

> Hi,
>
>    You might want to check out what I have done for the B5500 and
>    PDP10.
>
>    http://sky-visions.com/burroughs/xiii/
>
>    Are the files that will rebuild MCP XIII from source, including
>    build jobs.
>
>    The install and load TOPS 10 5.03 or 6.03 you can find the simH init
>    files here:
>
>     http://sky-visions.com/dec/tops10.shtml
>
>         http://sky-visions.com/dec/tops503/
>
>         http://sky-visions.com/dec/tops603/
>
>     These scripts use simH expect send to drive the simulators.
>
> Rich
>
>
> > So far I've got Multics, V7 and BSD4 running on SIMH in Google Cloud
> > Platform (GCP). I'm packaging some of these up into more turnkey
> > images and scripts so that more people can easily play with these
> > Grand Olde Operating Systemes.
> >
> > My end goal is a script that can be run on your local computer that
> > creates the cloud instance, installs and upgrades the OS, compiles
> > SIMH for the target HW, and boots the guest OS, all without any
> > needed input. I've got everything EXCEPT how to kick the OS boot in
> > the OS bootloader(s).
> >
> > My problem is that I probably haven't spent enough time with the docs
> > to figure out how to feed scripts "past" SIMH and into the
> > bootloaders.
> >
> > I'd also love to be able to inject commands into the SIMH process
> > through the API, but that's a different story.
> >
> > For example, the PDP-11 V6 boot looks like this:
> >
> > test-pdp11:~$ !80simh-master/BIN/pdp11 dboot.ini PDP-11 simulator
> > V4.0-0 Current git commit id: d40268d1Disabling XQ@
> > Now how do I get scripted input into the simulator so that I can give
> > the bootloader the "unix" filename at the @ prompt? I have the same
> > problem with the Multics bootloader, too.
> > Clearly I'm not being smart this week.
> > Ideas?
> > --tep
>
>
>
> --
> ==========================================================================
> Richard Cornwell
> rich at sky-visions.com
> http://sky-visions.com
> LinkedIn:   https://www.linkedin.com/in/richard-cornwell-991076107
> ==========================================================================
>
>
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