[Simh] pdp11 and unix

[Johnny Billquist]

On 2016-02-27 20:09, Paul Koning wrote:
>
>> On Feb 27, 2016, at 2:06 PM, Bill Cunningham <billcun at suddenlink.net> wrote:
>>
>> Or program in binary. Like originally.
>
> I'm not so sure about that.  I have documents from as early as 1948 showing programming in machine language, though each of these use decimal numbers for the opcodes and addresses.  While of course many machines were binary internally, I've never seen anyone actually code programs in binary.

Well, some very early machines were not binary, but decimal... Konrad 
Zuse was a believer in binary, though.

But really, binary, octal or hex. It's just representation. Once you sit 
with binary, it is a very obvious and simple step to decide you want it 
a bit more compact, and move to octal.

Hell, I think I can still program a PDP-8 straight from my head. The 
instruction set is simple enough that I did learn the whole thing. 
Programming on the front panel after that is easy.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol