----- Original Message ----- From: Clem Cole To: Bill Cunningham Cc: SIMH Sent: Thursday, February 25, 2016 9:22 PM Subject: Re: [Simh] pdp11 and unix
On Thu, Feb 25, 2016 at 7:50 PM, Bill Cunningham <[email protected]> wrote: When Ken Thompson coded UNIX it was in assembly. Correct... The first versions anyway before B/NB/C I do not think that is 100% correct. B and early UNIX sort of come about at the same time. B (and its pseudo model - BCPL) has only one data type (a word) and that works because UNIX was originally implemented on a word addressed machine. NB/C comes out when the Ken starts moving to the 11 which was byte addressed, as opposed to word addresses of it's predecessors. What model PDP was the first UNIX written on. All I know of s the PDP11. Bill
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