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   In article ,   
   The Natural Philosopher   wrote:   
   >Indeed. CISC processors running microcode are definitely in the 'secret   
   >software' class.   
   >Which is the nice thing about ARM. Keep it simple and run it blazingly   
   >fast. Although my friend who worked on the first chip at Acorn says it   
   >is massively more complex today than the original incarnation.   
      
   I've been poking around at these lately:   
      
   https://github.com/BrunoLevy/learn-fpga/   
   https://github.com/bl0x/learn-fpga-amaranth/   
      
   Two different HDLs, but with the same goal: start from nothing to bring up a   
   RISC-V CPU on an FPGA.  In its simplest form, you get only 11   
   instructions...not even integer multiply.  It's even simpler than the 6502   
   on which I got through high school and most of college.   
      
   --   
     _/_   
    / v \ Scott Alfter (remove the obvious to send mail)   
   (IIGS( https://alfter.us/         Top-posting!   
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