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

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   Message 4,064 of 4,255   
   wolfgang kern to Paul Edwards   
   Re: com port   
   19 Dec 23 11:50:21   
   
   From: nowhere@never.at   
      
   On 19/12/2023 10:16, Paul Edwards wrote:   
      
   ...   
   > > IOW you can still use your 32-bit OS via 64-bit UEFI boot.   
      
   > If I had made my OS do 32-bit UEFI calls instead of 16-bit   
   > BIOS calls, as advertised, then all that work would have   
   > been wasted. 16-bit BIOS was more resilient. ie not   
   > requiring a rewrite as 64-bit UEFI caused.   
      
   16bit BIOS unfortunately exists only on a few emulators now,   
   but nothing on real hardware anymore.   
      
   So we are forced to take the UEFI route, I could write startup code as   
   64bit and then load my old 32bit OS which can switch to LM64 and back.   
      
   But even encumbering I may rewrite the whole thing as 64 bit soon.   
   hope to live long enough to see it working.   
      
   __   
   wolfgang   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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