From: muta...@gmail.com   
      
   On Saturday, March 18, 2023 at 9:11:02 PM UTC+8, muta...@gmail.com wrote:   
   > I thought that it was not possible to run 80386 software on an x64 in lm64   
   because they took away push eax etc so you only have push rax    
   >    
   > But I just realized that you can manipulate the stack manually. Ie mov eax   
   to offset 4 from esp etc.    
   >    
   > And sub esp, 4    
   >    
   > I don't mind writing a new compiler and I don't mind recompiling everything.    
   >    
   > So    
   >    
   > Is it possible to write 80386 code that runs on lm64 without issue?    
   >    
   > Ie are sufficient instructions available for a general purpose application?    
   >    
   > I would be running under 64 bit EFI    
   >    
   > Using only memory below 4 GB    
   >    
   > And without paging.    
   >    
   > The 32 bit code would be in a.out format and I would load it myself.    
   >    
   > Thanks   
      
   I just realized.   
      
   Even if it works, I'll hit the same problem I hit on the mainframe.   
      
   Negative indexes. A fundamental part of life.   
      
   For that to work I need to remap the 4 to 8 GB region onto 0 to 4   
      
   For that I presumably need to use paging.   
      
   For that I presumably need to exit boot services   
      
   Which I don't want to do   
      
   So I'm stuck again?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)