8 Apr
2010
8 Apr
'10
1:25 p.m.
I want to look in some .a files identified by file(1) as "old PDP-11
archive".
Anyone know what tool I can use on a modern *BSD or Linux system to
extract the files from an "old PDP-11" ar archive?
GNU ar complains "File format not recognized". ar tells me:
ar: supported targets: elf64-x86-64 elf32-i386 a.out-i386-netbsd
coff-i386 efi-app-ia32 elf64-little elf64-big elf32-little elf32-big
srec symbolsrec tekhex binary ihex netbsd-core
But I have no idea how to try different targets. The GNU ar manual page
doesn't tell me much.
Or how can I use modern pcc or gcc to compile old pre-ansi ar.c?
Any suggestions?
Now I found a simtools.zip via http://simh.trailing-edge.com/ which is
"a collection of tools for manipulating simulator file formats and for
cross-assembling code for the PDP-1, PDP-7, PDP-8, and PDP-11." But I am
not sure if this is related. On that note, any ideas how to extract
files from a ".tap" file used by simh? (For now I use view or strings to
look at it.)
Thanks,
Jeremy C. Reed
echo 'EhZ[h ^jjf0%%h[[Zc[Z_W$d[j%Xeeai%ZW[ced#]dk#f[d]k_d%' | \
tr '#-~' '\-.-{'
8 Apr
8 Apr
2:49 p.m.
On 8 Apr 2010, at 14:25, Jeremy C. Reed wrote:
Anyone know what tool I can use on a modern *BSD or
Linux system to
extract the files from an "old PDP-11" ar archive?
I think the politically correct approach to this would clearly be:
install a PDP-11 simulator on the host, and a suitable Unix on it, and
unpack the archives with ar.
Actually, that's wrong: the politically correct thing to do would be
to *buy a PDP-11*. But that seems to be fairly hard nowadays.
The former approach might be fairly practical though.
3:16 p.m.
read the ar(1) entry in the 7th edition manual, located at ...
http://plan9.bell-labs.com/7thEdMan/index.html
and write the tiny bit of C it takes to read the archive.
Brantley
On Apr 8, 2010, at 9:25 AM, Jeremy C. Reed wrote:
I want to look in some .a files identified by file(1)
as "old PDP-11
archive".
Anyone know what tool I can use on a modern *BSD or Linux system to
extract the files from an "old PDP-11" ar archive?
GNU ar complains "File format not recognized". ar tells me:
ar: supported targets: elf64-x86-64 elf32-i386 a.out-i386-netbsd
coff-i386 efi-app-ia32 elf64-little elf64-big elf32-little elf32-big
srec symbolsrec tekhex binary ihex netbsd-core
But I have no idea how to try different targets. The GNU ar manual page
doesn't tell me much.
Or how can I use modern pcc or gcc to compile old pre-ansi ar.c?
Any suggestions?
Now I found a simtools.zip via http://simh.trailing-edge.com/ which is
"a collection of tools for manipulating simulator file formats and for
cross-assembling code for the PDP-1, PDP-7, PDP-8, and PDP-11." But I am
not sure if this is related. On that note, any ideas how to extract
files from a ".tap" file used by simh? (For now I use view or strings to
look at it.)
Thanks,
Jeremy C. Reed
echo 'EhZ[h ^jjf0%%h[[Zc[Z_W$d[j%Xeeai%ZW[ced#]dk#f[d]k_d%' | \
tr '#-~' '\-.-{'
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5:09 p.m.
On Thu, 8 Apr 2010 08:25:29 -0500 (CDT)
"Jeremy C. Reed" <reed(a)reedmedia.net> wrote:
Anyone know what tool I can use on a modern *BSD or
Linux system to
extract the files from an "old PDP-11" ar archive?
GNU ar complains "File format not recognized". ar tells me:
ar: supported targets: elf64-x86-64 elf32-i386 a.out-i386-netbsd
coff-i386 efi-app-ia32 elf64-little elf64-big elf32-little elf32-big
srec symbolsrec tekhex binary ihex netbsd-core
The 'ar' format of that vintage is trivial, and documentation easily
found. I wrote programs to read it back in 1976!
A simple C program, or even an awk script, should do it.
--
Bob
9 Apr
9 Apr
5:11 a.m.
On Thu, Apr 08, 2010 at 08:25:29AM -0500, Jeremy C. Reed wrote:
I want to look in some .a files identified by file(1)
as "old PDP-11
archive".
Anyone know what tool I can use on a modern *BSD or Linux system to
extract the files from an "old PDP-11" ar archive?
As an alternative to doing it by hand, you can compile and install my
Apout user-mode simulator, then run a PDP-11 ar inside Apout. This gives
you direct access to your normal filesystem, which makes extraction easier.
The latest Apout can be found in the svn snapshot here:
http://code.google.com/p/unix-jun72/downloads/list
You will also need to grab some V7 binaries, at least /bin/sh and /bin/ar,
from
http://minnie.tuhs.org/Archive/PDP-11/Distributions/research/Henry_Spencer_…
Cheers,
Warren
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4 comments
5 participants
participants (5)
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Bob Eager -
Brantley Coile -
Jeremy C. Reed -
Tim Bradshaw -
Warren Toomey