[TUHS] Pipes (was Re: After 50 years, what has the Impact of Unix been?)

[Ron Natalie]

NO, the 11/23 has an MMU and was perflectly capable of running  UNIX.   
The 23+ had the extra  address lines  allowing it to address 4 MB like 
the 11/70.


------ Original Message ------
>From "Adam Thornton" <athornton at gmail.com>
To "Ron Natalie" <ron at ronnatalie.com>; "The Eunuchs Hysterical Society" 
<tuhs at tuhs.org>
Date 12/5/2024 9:29:24 PM
Subject Re: [TUHS] Re: Pipes (was Re: After 50 years, what has the 
Impact of Unix been?)

>/23+, no?  The basic 23 doesn't have an MMU, I'm pretty sure.
>
>On Thu, Dec 5, 2024 at 11:58 AM Ron Natalie <ron at ronnatalie.com> wrote:
>>I remember on MiniUnix (a stripped down kernel that would run on 
>>PDP11’s
>>without memory management, in our case 11/03, 11/20, and an older 
>>11/40)
>>there were no kernel pipes (and limited process concurrency).
>>The shell used the aforementioned emulation of pipe by just running 
>>the
>>output of one process into a temporary file subsequently loaded as 
>>stdin
>>of the other.
>>
>>We kind of put all that to bed when the 11/23s came out and we could 
>>run
>>our full up kernel on the micros.
>>
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