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

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   Message 4,071 of 4,255   
   Paul Edwards to wolfgang kern   
   Re: PM to RM   
   29 Dec 23 18:50:31   
   
   From: mutazilah@gmail.com   
      
   On 29/12/23 15:32, wolfgang kern wrote:   
      
   > I'd forget about LOADALL it's opcode has a new meaning now.   
   > and return from protected mode needed a forced crash on 286.   
      
   Sure. All to be hidden behind a BIOS call.   
   And on a non-286 it can be done in a more   
   elegant way.   
      
   > why bother with BIOS calls (which may not be present at all)?   
   > my "all-mode switches"   
   > [from any to any of RM16,PM16,PM32,LM64,CM16,CM32]   
   > are just a few bytes large and share only one system-stack,   
   > all whats required is proper setup of GDT and IDT entries up front.   
      
   That's a good idea actually.   
      
   BFN. Paul.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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