[Simh] pdp11 and unix

[Will Senn]

Sent from my iPhone

> On Feb 26, 2016, at 5:28 PM, Nigel Williams <nw at retrocomputingtasmania.com> wrote:
> 
>> On Sat, Feb 27, 2016 at 10:24 AM, Johnny Billquist <bqt at softjar.se> wrote:
>> On 2016-02-26 23:47, Eric Smith wrote:
>>>> On Feb 25, 2016, at 9:26 PM, Gregg Levine <gregg.drwho8 at gmail.com
>>>> <mailto:gregg.drwho8 at gmail.com>> wrote:
>>>> 
>>>> Version Zero was hand coded on a PDP-7
>>> 
>>> 
>>> I know Gregg is right.  But .. Can you /imagine?/
>> Not sure I understand this comment either. Are you suggesting that coding an
>> OS is assembler is something exceptional or complicated, or unusual?
> 
> I took "hand-coded" to mean Version Zero was (initially) done without
> an assembler, they wrote down the instructions in machine code.
> 
> Perhaps not unusual for the 1960s but laborious none-the-less.
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I don't understand this. The PDP 7 had an assembler and debugger. Wouldn't they have used the assembler to generate the bootstrap system?