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   alt.os.development      Operating system development chatter      4,255 messages   

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   Message 3,384 of 4,255   
   Joe Monk to All   
   Re: segmentation   
   31 Oct 22 03:22:16   
   
   From: joemonk64@gmail.com   
      
   > Given that SubC was written by a single guy, and is    
   > 6000 lines of code, and given that the US government    
   > was apparently splashing money around, why didn't    
   > they hire someone like Nils for a year to write a    
   > public domain C compiler - ie SubC - once and for all?    
   >    
      
   The US Government doesnt run on the C language...    
      
   "The AP-101, being the top-of-the-line of the System/4 Pi range, shares its   
   general architecture with the System/360 mainframes. It has 16 32-bit   
   registers, and uses a microprogram to define an instruction set of 154   
   instructions. Originally only 16 bits    
   were available for addressing memory; later this was extended with four bits   
   from the program status word register, allowing a directly addressable memory   
   range of 1M locations."   
      
   "The Space Shuttle used five AP-101 computers as general-purpose computers   
   (GPCs). Four operated in sync, for redundancy, while the fifth was a backup   
   running software written independently. The Shuttle's guidance, navigation and   
   control software was    
   written in HAL/S, a special-purpose high-level programming language, while   
   much of the operating system and low-level utility software was written in   
   assembly language. AP-101s used by the US Air Force are mostly programmed in   
   JOVIAL, such as the system    
   found on the B-1B Lancer bomber."   
      
   https://en.wikipedia.org/wiki/IBM_System/4_Pi   
      
   Joe   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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