[TUHS] Unix with TCP/IP for small PDP-11s

Warner Losh imp at bsdimp.com
Sat May 20 10:21:01 AEST 2017


Looks like it requires MMU, but not split I/D space as it lists the
following as compatible: M11, 11/23+, 11/24, 11/34, 11/40 and 11/60. It
does require 256kb of memory. See table 2, page 6 for details.


On Fri, May 19, 2017 at 6:15 PM, Warner Losh <imp at bsdimp.com> wrote:

> There's a copy of ultrix-11, which is v7 based with some 4.1BSD additions,
> including sockets and a TCP/IP stack. Don't know if it runs on the smaller
> PDP-11, but it looks like it might. The sources are in the TUHS archives.
> Seems like the best low-end v7ish kernel with TCP/IP around, but I've not
> used it extensively.
> Warner
> On Fri, May 19, 2017 at 1:04 PM, Ron Natalie <ron at ronnatalie.com> wrote:
>> To my knowledge no.   We had already gone to code overlays on the 11/34’s
>> just to get the pre-TCP unix working.    When we needed yet another segment
>> to map mbufs (which we could do on the 11/70), there just weren’t any
>> left.      It was then that I scarfed up all the 11/23, 24, 34’s that were
>> available and turned them into routers.
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