In a message dated 10/31/2016 6:36:17 A.M. US Mountain Standard Time, j...@mercury.lcs.mit.edu writes:
> From: Ed Sharpe > was Unix or C the one developed on the 11/20? Both. Unix Version 1 was written in PDP-11 assembler, for the -11/20; although that was a re-write of an earlier version written in PDP-7 assembler. C was developed from B in good part because the word address model of B (inherited from its ancestor BCPL) wasn't a good match for the PDP-11's byte addressing model. More here: https://www.bell-labs.com/usr/dmr/www/hist.html https://www.bell-labs.com/usr/dmr/www/chist.html > From: Christian Corti > I think the IP stack needs separate I/D and more memory I read that the networking code in 2.x uses Supervisor mode (apparently it needed more address space than was available with only kernel, even with split I/D). Noel Great History Noel! Many Thanks! ... I wonder if the pdp-11 was just called pdp-11 at t that point or was a pdp-11/20 like we have.. I know they are essentially the same at this time point they got their PDP 11 what did it say on the front panel I wonder? (figuring all this stuff out for titling up the cards in the 11/20 display we are planning.) thanks Ed Sharpe _www.smecc.org_ (http://www.smecc.org)