[Info-vax] OT: PDP-11 history in arstechnica

[Simon Clubley]

On 2022-03-14, Bob Gezelter <gezelter at rlgsc.com> wrote:
> On Monday, March 14, 2022 at 7:47:34 PM UTC-4, Arne Vajhøj wrote:
>> https://arstechnica.com/gadgets/2022/03/a-brief-tour-of-the-pdp-11-the-most-influential-minicomputer-of-all-time/
> Arne,
>
> Not sure where the author of the arstechnica piece saw "$" for immediate mode, e.g., mov $10,r0. MACRO-11 as I new it, always used a "#", e.g., MOV #SS.XYZ,R0.
>
> Spent lots of time writing and generating assembler for RSX-11 systems and relatives, e.g., P/OS. Did many interesting things.
>
> - Bob Gezelter, http://www.rlgsc.com

DEC versus AT&T syntax (and yes, I know the following is Intel not DEC,
but it's much the same thing here for the syntax you mention):

https://wiki.osdev.org/Opcode_syntax

Perfectly normal and expected. Also note "mov src, dest" instead of
"mov dest, src".

Expect to see more of it in your future. :-)

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.