[TUHS] quick question on PDP-11 addressing

[Jonathan Gray via TUHS]

On Mon, May 04, 2026 at 02:19:59AM -0400, Phil Budne via TUHS wrote:
> I wrote:
> > CB (Columbus Bell) Unix, and SVR1 ran on 11's and supported shared
> > memory segments.
> 
> The sysv_pdp11.tgz I just found has has a library shmsys.c which
> indicates SHMSYS was syscall 52, but it's a "nosys" entry in sysent.c
> AND I've yet to spot the kernel support in the available CB Unix
> listings...

You may be looking for MAUS?

https://www.tuhs.org/Archive/Distributions/USDL/CB_Unix/man/man2/maus.2.pdf

maus.c cbunix4.pdf pp 64-66
sysent.c cbunix6.pdf pp 50-52

	1, &maus,			/* 58 = set up MAUS segment reg */