8 Dec
2024
8 Dec
'24
2:38 a.m.
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(a)gmail.com>
To "Ron Natalie" <ron(a)ronnatalie.com>; "The Eunuchs Hysterical
Society"
<tuhs(a)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(a)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.
>