XPost: comp.theory   
   From: polcott333@gmail.com   
      
   On 10/30/2025 2:05 PM, Kaz Kylheku wrote:   
   > On 2025-10-30, dart200  wrote:   
   >> are you seriously trying to tell me that you don't think it's possible   
   >> to design a computer chip that can do simple things like:   
   >>   
   >> 1) dump the program it's running on demand?   
   >> 2) save the initial memory to an internal buffer to dump on demand?   
   >> 3) dump the current instruction address on demand?   
   >> 4) duplicate memory on demand????   
   >>   
   >> cause right now ur saying u can't imagine a computer chip doing that   
   >   
   > All of what you say above is literally done by embedded devs around the   
   > planet, daily, with JTAG debuggers and similar.   
   >   
   > It makes no sense as a product feature in the chip itself, beyond   
   > providing support for the debugging interface.   
   >   
   > But yes; someone could combine the JTAG debugger with the rest of   
   > the board and have some sort of product that does reflection.   
   > It's possible with the current tech.   
   >   
   > It would need the help of the second processor; the host would give   
   > it a command like "please stop me for a moment, and grab a snapshot   
   > of such and such state". Then when that is done, the snapshot can be   
   > downloaded to the host from the helper chip (or already available   
   > in memory).   
   >   
      
   It may make more sense for a UTM do do reflection even   
   on its own behavior. It could write each step that itself   
   takes on a portion of its own tape.   
      
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