Re: [TUHS] Whence 1st Edition Unix Kernel Assembly?

On Thu, Apr 24, 2008 at 10:53:30AM -0700, James A. Markevitch wrote: The date on the first page of the memo (PDF) is September 1972. That puts the memo after 2nd Edition (June 1972) and 3rd Edition (Feb 1973). The s2 tape in the Unix Archive has binaries which are dated mainly in 1972, spread from January thru to December, so they should be contemporaneous with the kernel in the PDF. The 1st Edition manuals are on-line on Dennis Ritchie's web page at: http://cm.bell-labs.com/cm/cs/who/dmr/1stEdman.html I have a photocopy of the 2nd Edition manuals from Norman Wilson; I will scan them in as a bunch of tiffs. The 3rd Edition manuals are at http://www.tuhs.org/Archive/PDP-11/Distributions/research/Dennis_v3/v3man.t… but they refer to the C version, so they may not be as useful here. No, the s1 and s2 tapes are the earliest machine readable files that we have. I'm assuming that some of you are keen to see it running. It's going to take a lot of work, especially on the debugging side. The existing 1972 binaries are already executable using my Apout emulator, so that will help in two ways: we can run the old assembler, and we can tell if a bug was in a userland binary and not in the kernel. If I get a chance, I should try to compare the 1e and 2e manuals, to outline the kernel API differences, as this might help us to determine which binaries we have that will run on the PDF kernel. Cheers, Warren