home bbs files messages ]

Forums before death by AOL, social media and spammers... "We can't have nice things"

   comp.sys.raspberry-pi      Raspberry Pi computers & related hardwar      26,127 messages   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]

   Message 24,813 of 26,127   
   The Natural Philosopher to Brian Gregory   
   Re: RP2350 and Pico 2 - things missing   
   22 Aug 24 09:17:19   
   
   From: tnp@invalid.invalid   
      
   On 21/08/2024 23:43, Brian Gregory wrote:   
   > On 17/08/2024 08:22, Lawrence D'Oliveiro wrote:   
   >> Or, you could bring back the old PDP-8 trick, of having the jump address   
   >> be in the *current page*. That means the upper bits are taken from the   
   >> current program counter.   
   >   
   > That must be damn annoying to program in assembler.   
   > Probably slows compilers down a fair but too.   
   >   
      
   IIRC 8086 was the same for conditional jumps.   
      
   In fact the whole small model thing was coding for a 64k page.   
      
   There were a few instructions that worked across pages...but my memory   
   is dim.   
      
      
   --   
   "When a true genius appears in the world, you may know him by this sign,   
   that the dunces are all in confederacy against him."   
      
   Jonathan Swift.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

[   << oldest   |   < older   |   list   |   newer >   |   newest >>   ]


(c) 1994,  bbs@darkrealms.ca