Den 2015-11-20 kl. 17:35, skrev Will Senn:
Hi,
I have searched and searched and have not found a satisfactory answer
to this question:
How can I efficiently copy files from my host system to unix version 6
running in the pdp11 emulator and from unix 6 to my host system?
I usually do this by just tar'ing to/from a disk file, something like:
on pdp11: tar cf /dev/rxp0c myfiles
on host: tar xf simh-disk-file
Works both ways :-)
-- Ragge
Most answers are shallow (copy/paste in terminal), or oriented toward
RTS or another environment than unix. So, I thought I would articulate
some of the ideas that I have tried and then ask some relevant
questions in the hopes that the someone will shed some light on the
problem, if not provide the answers.
My system is one of:
Debian 8 running on Intel Core 2 Quad Processor
FreeBSD 10.2 running on same
Macbook Pro running on Intel i7
Various Linuxes running in Virtualbox 5.x
Here are the methods I have found that work, sort of...
Unix on PDP11 SimH to Host:
1. cat file and copy and paste from terminal
This only works for pure text files and is not ideal
2. setup lpt in simh attached to printer.txt and cat file > /dev/lp0
This only works for textual output, but includes form feed characters
and has formatting applied on its way to printer.txt
3. attach a blank tape tm0 to simh and dd if=myfile of=/dev/rmt0, then
on the host deblock the tape and dd if=tapefile of=myfile
This seems to work, but I'm not sure it's ok to do this. It doesn't
appear to work as well in the other direction.
Host to Unix v6 on PDP11 SimH:
1. copy a file into the copy buffer on the host and in the unix
terminal window, paste the text.
Wow, this is tricky. It seems like you can only paste a few lines at a
time. It does strange things if your text contains special characters
like #, @, (, and so forth, which makes it pretty annoying as
practically every file of interest is c source or something. However,
with patience this does sort of work, but it's just for text files.
2. use Wolfgang's enblock - enblock < myfile > myfile.enb and then
attach to tm0 in simh and dd if=/dev/rmt0 of=myfile
This is problematic, resulting in read errors and when diff'ed against
files on the simh unix instance, produces errors about incomplete
lines. I am fairly sure that there is a good reason why it sort of
works, but not fully. i.e. The resulting file is 99% ok.
Ideally, I would be able to tar up some files and convert the tar to a
storage format that unix v6 could then access and untar. One problem
is that v6 doesn't have tar. So, maybe ar could be used, or tp, or
whatever other command is available on v6. Regardless, the underlying
issue is that a file needs to be converted to a storage format that
unix v6 can handle. This leads to the questions.
* I don't have a deep knowledge of storage formats, so it may be that
what I'm asking isn't feasible, if someone could share the why along
with the how or how not, that would be great.
1. Is there a simple, known, way to convert a single file, or multiple
files at once, on a *nix host to a tape image that can be read by simh
and unix v6? Perhaps something along the lines of - on the host,
convert_util myfile tape.simh; in simh, attach tm0 tape.simh; on unix,
dd if=/dev/mt0 of=myfile
2. Is it appropriate to read directly from a simulated tape device
using dd, or is dd going to read the tape marks (whatever those are)
as part of the file data?
3. Is the tape device the best to use for something like this, or
would another device be more straightforward?
Grateful for any assistance,
Will
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