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Re: What Ever Happened To... The PDP-11 Architecture? (was: Re: Simulator and RSTS v7.0 Update)

Aron Insinga wrote:

> So does anybody know the patent # for GRPs & addressing modes?  
That was how the PDP-11 was protected.  The PDP-8 was protected with a 
patent on the auto-indexing memory locations; I don't know that patent # 
either.  It would be amusing to get copies of them from the Patent & 
Trademark Office.

Try the on-line patent search available at ibm:


Ralph Gonzalez