I used RT-11 versions 4 and 5, and I seem to remember the MACRO-11 there had .ASCIZ.

On Fri, Dec 16, 2022, 1:12 PM Dave Horsfall <dave@horsfall.org> wrote:

On Fri, 16 Dec 2022, Dr Iain Maoileoin wrote:

> I remember running into a .asciz directive n the 70s “somewhere”. It was
> an assembler directive in one of the RT11 systems??? or perhaps the unix
> bootstrap and/or “.s” files - when I get some time I will go read some
> old code/manuals.

MACRO-11 on RSX-11D seems to ring a bell...

I first encountered it on RSTS/E 6C in the MACRO-11 it had... But the v6 macro assembler from DEC via Harvard that eventually wound up in 2BSD is older and dates to 1977 or so.

Warner