From: muta...@gmail.com   
      
   Took a while to get a partial response that was tangible ...   
      
   On Tuesday, April 4, 2023 at 9:18:59 AM UTC+8, Dan Cross wrote:   
      
   > >> >Jean-Marc has higher goals, but I'm only trying to get    
   > >> >to a lower goal of getting a C compiler working.    
   > >> >    
   > >> >And after that a serial port to access the outside world.    
   > >> >    
   > >> >I've written a serial port driver before, for the 8086.    
   > >> >It wasn't a lot of code.    
   > >    
   > >> That's only one of many things you'd have to write, and it's    
   > >> relatively easy by comparison to many of the others.    
   > >    
   > >Could you give me say the 3 most difficult things to    
   > >write for the proposed desktop?   
      
   > Probably initializing the memory and cache controllers, then    
   > DRAM training, and then IO topology initialization. Of course,    
   > all of this is after loading an an initial bootstrap and before    
   > the CPU is even out of reset.   
      
   Are you sure this needs to be written? The first thing   
   you mentioned above was initializing the memory.   
   Does this code not already do that?   
      
   https://opencores.org/websvn/filedetails?repname=plasma&path=%2F   
   lasma%2Ftrunk%2Ftools%2Fddr_init.c   
      
   BFN. Paul.   
      
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