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

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   Message 4,007 of 4,255   
   rugxulo to James Harris   
   Re: PDOS/386 booting on a real 80386SX   
   29 Nov 23 21:02:08   
   
   From: rugxulo@gmail.com   
      
   Hi,   
      
   On Wednesday, November 29, 2023 at 3:24:37 AM UTC-6, James Harris wrote:   
   > On 28/11/2023 09:49, Paul Edwards wrote:    
   > >    
   > > That's all I really wanted to know - that PDOS/386    
   > > has no non-80386 instructions in it. Instead of hoping    
   > > the emulators are perfectly correct   
   >   
   > That's a bit confusing. You tested your code on a 386SX to check it had    
   > no 386 instructions in it?   
      
   I assume he means no 486-ish instructions (BSWAP, XADD, CMPXCHG, CPUID).   
      
   > FWIW my CPU detection code does theoretically distinguish between 8086,    
   > 80186 and 80286 but I've never had a real 186 to test it on.   
      
   I think 186 was mostly embedded, though there was a Tandy that Bill Gates   
   was in an ad for.   
      
   * https://www.vintagecomputing.com/index.php/archives/411/retro-   
   can-of-the-week-bill-gates-celebrity-spokesman   
      
   > Instead, I found two emulators, only one of which apparently behaved   
   > correctly as a 186.    
      
   Try this one fork (they fixed a lot of 186 stuff, e.g. ENTER):   
      
   * https://github.com/ecm-pushbx/8086tiny   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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