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

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   Message 3,290 of 4,255   
   mutazilah@gmail.com to wolfgang kern   
   Re: segmentation   
   08 Oct 22 04:42:48   
   
   From: muta...@gmail.com   
      
   On Saturday, October 8, 2022 at 1:57:22 PM UTC+8, wolfgang kern wrote:   
   > On 07/10/2022 22:42, muta...@gmail.com wrote:   
   > > On Friday, October 7, 2022 at 6:48:02 PM UTC+8, Joe Monk wrote:   
   > >> "Right, and what is preventing an 8086 tiny model program   
   > >> from running on an 8080-replacement? "   
   > >> 8086 is source compatible with 8080. That means an 8086 can run 8080   
   instructions - but the reverse is not true.   
   > >   
   > > There was a translation program required to   
   > > convert 8080 source into 8086 source.   
   > yeah, but only to improve performance   
      
   That suggests to me that if performance   
   is not an issue, then 8080 source code   
   can be compiled into 8086 instructions.   
      
   But I guess those 8086 instructions may be   
   different from the 8080 instructions.   
      
   Which is not what I am after.   
      
   Regarding z80 etc - if they could   
   have been produced in the 8080   
   timeframe for similar to 8080 cost,   
   that would be fine - so long as they are   
   compatible with a subset of 8086   
   tiny memory model.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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