From: llc@fonz.dk   
      
   On 2/12/26 23:12, john larkin wrote:   
   > On Thu, 12 Feb 2026 21:05:53 +0100, Lasse Langwadt    
   > wrote:   
   >   
   >> On 2/12/26 19:19, john larkin wrote:   
   >>> The internal stack-oriented architecture of Focal-8 inspired the cool   
   >>> PDP-11 architecture which in turn inspired the 68K.   
   >>   
   >> how did stack-oriented inspire architectures with lots of orthogonal   
   >> registers, by showing how it should not be done?   
   >>   
   >   
   > Stack-oriented inspired stack-oriented. In the PDP-11, any of the   
   > registers could be used as a stack pointer.   
      
   so it had a bunch of orthogonal registers that could be used for   
   anything you like, including stack pointer(s) though I don't see   
   why you wouldn't always use R6   
      
   that is register oriented, stack oriented is things like Forth and Java   
      
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