From: arnold@skeeve.com (arnold@skeeve.com)
Subject: [TUHS] Unix v6 File System information
Date: Sun, 21 Feb 2016 12:31:26 -0700 [thread overview]
Message-ID: <201602211931.u1LJVQnQ021425@freefriends.org> (raw)
In-Reply-To: <CAC20D2O8s_8XnCbAvxRXVJCxdgtFCW7vyzgKs_gNvf36+2PuRQ@mail.gmail.com>
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Already been done: see http://osxbook.com/software/ancientfs/
Arnold
Clem Cole <clemc at ccc.com> wrote:
> Will Senn asked
>
> > Supposing I created a byte faithful representation of a V6 filesystem
>
> > on my mac, would I then be able to load the file in simh as an RK05 and
> > > mount and access its files and directories from a V6 instance?
> >
>
> Not 100% sure how to parse this... but that is exactly how simh (and
> Ersatz11)
>
> work.
> You have a UNIX file on your mac and at the simh interactive command
> system, you "attach" it as the data for the simulated RK05.
> But it's a manual process to do the attachment AND more importantly,
> since Mac OSx just sees it as bits, as a minimum you need to write tools to
> push/pull V6 "files" from the image. This is the same as the "DOS Tools"
> trick you see in a lot of UNIX systems that know how to "grok" DOS/FAT file
> system images. You would need to do the same thing. If you poke around
> the Warren's TUHS archives, you might find some of this already there.
>
> What many of us do it attach a file as a virtual disk but instead of using
> a UNIX file system format, use it is a tape image. Then use tar/cpio or
> whatever if you already a tool on both sides that can interpret the bits.
> Hence, the v6tar discussion of a few weeks ago. The UNIX ar(1) format is
> sometimes used also, since it was common. cpio -c also works, but that
> was not on the research systems. My old room mate, Tom Quarles, wrote a
> really good ANSI tape reader/writer for BSD UNIX. That should back port to
> v6 with a little work, particularly if you the "typesetter C" compiler for
> V6 which supported enough of the V7 C. The advantage of the ANSI tape
> format is that its common with the DEC systems as well as UNIX.
>
>
> That said, you can be smarter and more automatic. As Noel says Ersatz11
> supports a virtual shared disk (the same way VMware and Parallels) do.
> Writing such a device for simh would be cool and in fact useful for many
> different emulators. Warning there are a lot of dragons hidden with such a
> shared FS. At is definitely doable, but is going to take some work.
>
> The other thing you could do that might be a little less work, but would be
> Mac specific, is Mac OSX has the FUSE file system emulation that stuff that
> Google released. If hacked up support for the old Unix FS, you could mount
> the V6 "disk" image as Mac OSx disk and see the bits with normal tools.
> I've thought about doing this but I have never had the time. If I ever
> became a serious user of the simh, I would probably want something more
> like this.
>
> Clem
next prev parent reply other threads:[~2016-02-21 19:31 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-21 18:27 Noel Chiappa
2016-02-21 18:59 ` Clem Cole
2016-02-21 19:31 ` arnold [this message]
2016-02-21 20:45 ` Will Senn
2016-02-21 21:06 ` Clem Cole
2016-02-21 21:05 ` Will Senn
2016-02-21 21:21 ` Clem Cole
2016-02-22 2:20 ` Warren Toomey
[not found] ` <2D41A491-40CD-41DB-B3BA-0ACBD831E2C7@gmail.com>
2016-02-22 7:27 ` Warren Toomey
-- strict thread matches above, loose matches on Subject: below --
2016-02-22 1:54 Norman Wilson
2016-02-22 3:02 ` Larry McVoy
2016-02-21 21:51 Noel Chiappa
2016-02-21 17:50 Noel Chiappa
2016-02-21 18:36 ` Random832
2016-02-22 13:10 ` ron
2016-02-21 11:44 Noel Chiappa
2016-02-21 13:34 ` Dave Horsfall
2016-02-21 15:21 ` Will Senn
2016-02-21 17:21 ` John Cowan
2016-02-22 1:58 ` Dave Horsfall
2016-02-22 2:32 ` Lyndon Nerenberg
2016-02-22 12:30 ` Tony Finch
2016-02-21 15:36 ` Will Senn
2016-02-21 20:24 ` Warren Toomey
2016-02-21 17:31 ` Random832
2016-02-21 17:36 ` ron
2016-02-21 9:45 Will Senn
2016-02-21 10:01 ` Dave Horsfall
2016-03-04 19:10 ` Jacob Ritorto
2016-03-10 8:51 ` Dave Horsfall
2016-03-10 9:31 ` SPC
2016-02-21 10:27 ` arnold
2016-02-21 12:29 ` Dave Horsfall
2016-02-21 13:54 ` arnold
2016-02-21 14:40 ` Clement T. Cole
2016-03-04 9:27 ` Dave Horsfall
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