[Simh] pdp11 and unix

[Gregg Levine]

Hello!
Now that I think about the scene, it might have been a frustrated
PDP-8 at work. I do recall that the exhibit spent more time being
fixed, then being running....

It is certainly possible you're right.

But not confused.

Then I was beginning to suffer from information overload.
-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."


On Fri, Feb 26, 2016 at 9:54 AM, Johnny Billquist <bqt at softjar.se> wrote:
> On 2016-02-26 15:23, Gregg Levine wrote:
>>
>> Hello!
>> Interesting.
>>
>> I was only reporting what I remember as to the history of the whole
>> example we call UNIX.
>>
>> And last year at the Vintage Computer Festival East, (Yes Dave W, the
>> same one where we crossed paths.), I saw a PDP-11 system having
>> finished dumping his program output to a TTY setup. I commented then
>> that the instructions shown resembled an 6502 one, I was also thinking
>> of the original 6800, but did not say that, and then it wasn't until I
>> walked away that I thought of a 68000, but only because I was inspired
>> by something I had read regarding the history of what was used in the
>> first Mac or its ancestor. And then continuously until much later when
>> reason caused Apple to switch to the PowerPC. Let's not discuss the
>> decision to switch to Intel.
>
>
> But then you must have looked at some code that was not PDP-11, or else you
> are very confused about the 6502, or else you are very confused about
> assembler in general.
>
> You are comparing a processor with generic registers, with lots of
> addressing modes, and a fully orthogonal instruction set, to a processor
> that is accumulator based, have rather limited addressing modes, and limited
> combinations of arguments to instructions.
>
> The 6502 have more in common with the PDP-8, I'd say.
>
>         Johnny
>
>
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