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

Bill Gunshannon bill.gunshannon at gmail.com
Tue Mar 15 13:08:37 EDT 2022


On 3/14/22 21:22, Simon Clubley wrote:
> 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):
> 

That appears to be it.  Just checked again and see that under Ultrix-11
it is the "$" instead of the "#" and we all now that Ultrix-11 is really
just V7 warmed over.  :-)

bill





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