22 Feb
2016
22 Feb
'16
3:06 a.m.
It has not been updated since about 10.5 so I'm not surprised.
On Sun, Feb 21, 2016 at 3:45 PM, Will Senn <will.senn(a)gmail.com> wrote:
I've tried to use ancientfs, but couldn't
get it to work. Other fuse FSes,
yes, ancientfs, no.
On 2/21/16 1:31 PM, arnold(a)skeeve.com wrote:
Already been done: see
http://osxbook.com/software/ancientfs/
Arnold
Clem Cole <clemc(a)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