On 2016-02-26 01:50, Bill Cunningham wrote:
When Ken Thompson coded UNIX it was in assembly. The first versions
anyway before B/NB/C. Is there in existance pdp11 (45 or 70 ?) intterupt
(vector) lists or IRQs and so, registers that shows how to code in
assembly on a pdp11? I am sure simh does it. Isn't what the "dep"
command is for?
I'm not sure what you ask for. The first version of Unix was for a
PDP-7, so any PDP-11 information is irrelevant.
UNix was then ported to the PDP-11, and was still written in assembler.
It was then rewritten in C, however, there are still parts that are
written in assembler. Not everything can be done in C...
Johnny
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