From: muta...@gmail.com   
      
   On Tuesday, April 4, 2023 at 7:20:02 PM UTC+8, Dan Cross wrote:   
      
   > >> >Ok, so the proposed laptop could be built, and cover both    
   > >> >memory-mapped I/O and "legacy IO".    
   > >    
   > >> That would be a silly design if your intent is to work with a    
   > >> CPU that doesn't even have programmed IO instructions, let alone    
   > >> the sort of external bus cycles required for PIO to work.    
   > >    
   > >The intent is to allow the user to zap either CPU type    
   > >onto the FPGA.   
      
   > Now you're back to the original problem of trying to shoehorn a    
   > MIPS core into a system designed around an x86 core, or the    
   > inverse, which is what I already told you was problematic.   
      
   That *is* the solution to the original problem. A serial   
   port that can be driven by either MMIO or legacy IO.   
      
   It's not a silly design. It allows flexibility of CPU loading   
   onto the FPGA.   
      
   > >> What you want doesn't exist, and you have to actually have a lot    
   > >> of real knowledge to build such a thing. Building a laptop    
   > >> style system around an FPGA is non-trivial; certainly not the    
   > >> type of thing a hobbyist with no domain knowledge is up to.    
   > >    
   > >I'm not sure where you got the idea I intended to    
   > >build it myself. The whole purpose of buying a    
   > >pre-made laptop is so that I don't have to build    
   > >it myself.   
      
   > Meh. What you're asking for does not exist and those that are    
   > capable of building such a thing aren't interested in doing so,    
   > so it's all moot.    
      
   Sure. That's basically my question.   
      
   I was just asking if a laptop that I wanted already existed,   
   and if it didn't, could it be built.   
      
   I'm not sure how many hobbyists are interested in loading   
   any CPU they want onto the same laptop.   
      
   But regardless, if supporting firmware needs to be written,   
   and that is difficult, it's a doubly moot point.   
      
   None of this appears to be viable, but I'm still waiting   
   for feedback.   
      
   I think the best thing is to continue on with the 80386,   
   as was being done before this proposal. And to a lesser   
   extent, PdAndro.   
      
   Thanks for all the technical info.   
      
   BFN. Paul.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)