13 Jun
2015
13 Jun
'15
12:39 a.m.
From: Mark Longridge <cubexyz(a)gmail.com>
My first idea was to grab bj.s from 2.11BSD and
assemble it the Unix v5
as command. That seems to generate a bunch of errors. Also other
assembly source files don't seem to have .even in them.
My first question was going to be 'Maybe try an earlier version of the
source?', but I see there is no earlier version online. Odd. ISTR that some
of the fun things in V6 came without source, maybe blackjack was the same way?
Another idea would be generate the source code from
the executable
itself, but there doesn't seem to be a disassembler for early Unix.
Where's the binary? I'd like to take a look at it, and see if the source was
assembler, or C (there's a C version in the source tree, too). Then I can
look and see how close it is to that 2.11 source - that may be a
re-implementation, and totally different.
Noel
13 Jun
13 Jun
1:01 a.m.
New subject: recreating bj.s for Unix v5
Here it is:
http://www.maxhost.org/other/unix-v5-bj-pdp-11-executable
Judging by it's small size I figure the original code was assembly language.
On 6/12/15, Noel Chiappa <jnc(a)mercury.lcs.mit.edu> wrote:
From: Mark
Longridge <cubexyz(a)gmail.com>
My first idea was to grab bj.s from 2.11BSD and
assemble it the Unix
v5
as command. That seems to generate a bunch of
errors. Also other
assembly source files don't seem to have .even in them.
My first question was going to be 'Maybe try an earlier version of the
source?', but I see there is no earlier version online. Odd. ISTR that some
of the fun things in V6 came without source, maybe blackjack was the same
way?
Another idea would be generate the source code
from the executable
itself, but there doesn't seem to be a disassembler for early Unix.
Where's the binary? I'd like to take a look at it, and see if the source
was
assembler, or C (there's a C version in the source tree, too). Then I can
look and see how close it is to that 2.11 source - that may be a
re-implementation, and totally different.
Noel
4:46 a.m.
New subject: recreating bj.s for Unix v5
On Friday, 12 June 2015 at 15:01:51 -0400, Mark Longridge wrote:
On 6/12/15, Noel Chiappa
<jnc(a)mercury.lcs.mit.edu> wrote:
Wouldn't it make sense to disassemble it and create a source file from
that?
Greg
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Where's the binary? I'd like to take a
look at it, and see if the
source was assembler, or C (there's a C version in the source tree,
too). Then I can look and see how close it is to that 2.11 source -
that may be a re-implementation, and totally different.
Here it is:
http://www.maxhost.org/other/unix-v5-bj-pdp-11-executable
Judging by it's small size I figure the original code was assembly
language.
3481
days inactive
3481
days old
2 comments
3 participants
participants (3)
-
Greg 'groggy' Lehey -
jnc＠mercury.lcs.mit.edu -
Mark Longridge