From: nowhere@nevernet.at   
      
   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   
      
   > But even if that was not required, that   
   > still doesn't answer my question.   
   >   
   > I'm after an 8080 replacement that does a   
   > SUBSET of 8086 tiny model instructions.   
   >   
   > Is that possible, or is there a technical   
   > issue in switching between 8 bit   
   > and 16 bit such that the closest you   
   > can get is source translation?   
      
   have you checked on 8085, Z80 and Z-280 ?   
   Z80 can do 8080 code but is different from 8086.   
   back then long ago I decided for ZILOG and built   
   my first mini-PCs with Z80 and NSC800 (1979...)   
      
   my favorite MC/CPU was Z-280 until 1985, after   
   this I started with purchased 286/AMD486..64 PCs.   
      
   But my production line on ZILOG based mini-PC run   
   until 1997 even I programmed a lot of x86 stuff :)   
      
   I skipped 80186, 80386 and all later Intel-crap   
   because I prefer AMD (currently on RyZen5).   
   __   
   wolfgang   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)