[Simh] pdp11 and unix

[Will Senn]

Bill,

There is plenty of documentation on the pdp11 45/70. Start with the 
handbooks:
http://bitsavers.trailing-edge.com/pdf/dec/pdp11/handbooks/

As for programming in assembly, most of the documentation is for DEC 
OS's. However, the manuals for Unix v6 and v7 had assembly sections. 
They are available here:

Assembler Reference Manual from Sixth Edition Manual (postscript):
http://wwwlehre.dhbw-stuttgart.de/~helbig/os/v6/doc/as.ps

Section Assembler Reference Manual in Vol 2b of V7 Manual (pdf):
http://web.cuzuco.com/~cuzuco/v7/v7vol2b.pdf

Dep is for "depositing" values into the simulator's PDP memory space.

- Will

On 2/25/16 6:50 PM, 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?
> Bill
>
>
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