XPost: comp.mobile.android, alt.comp.os.windows-10   
   From: usenet@arnowelzel.de   
      
   Frank Slootweg, 2025-02-25 19:25:   
      
   > Arno Welzel  wrote:   
   >> Lawrence D'Oliveiro, 2025-02-22 00:35:   
   >>   
   >>> On Fri, 21 Feb 2025 09:12:09 +0100, Arno Welzel wrote:   
   >>>   
   >>>> Lawrence D'Oliveiro, 2025-02-18 22:55:   
   >>>>   
   >>>>> On Tue, 18 Feb 2025 11:56:41 +0100, Arno Welzel wrote:   
   >>>> [...]   
   >>>>>> And core memory is not *intended* to be non volatile storage ...   
   >>>>>   
   >>>>> It did work that way, you know. By design.   
   >>>>   
   >>>> Which is irrelevant for what I said.   
   >>>   
   >>> You said it wasn?t intended to be non-volatile. But it was.   
   >>   
   >> No, it wasn't. This was just the side-effect of using magnetic cores.   
   >   
   >   Sorry, but that's nonsense. I gave some examples from that era, where   
   > non-volatility was not a 'side-effect', but an essential property   
   > without which the system(s) couldn't function,, especially in the   
   > abscence of on-line mass-storage.   
      
   If a property exists in a technology, it is used - of course. But this   
   does not mean, that a technology was especially designed for this use case.   
      
   >> As soon as *non-volatile* integrated circuits became cheaper, they   
   >> replaced core memory within a few years, because the proporty "non   
   >> volatile" was not the important thing. Instead having a lot of cheap RAM   
   >> was much more important - also when core memory was invented.   
   >   
   >   I think you mean "*volatile* integrated circuits", otherwise the rest   
   > of your comments do not make any sense. And indeed, after the second   
   > generation HP computers with core memory (2100), the third generation   
   > (21MX) had volatile RAM with ICs.   
      
   Exactly - *volatile* memory chips replaced core memory when they got   
   available and cheaper than core memory, because implementing RAM was the   
   main use case for core memory and not the fact, that it is non-volatile.   
      
   Even machines with core memory still had some kind of external storage   
   (punched tape, magnetic tape, drum memory etc.) because you still need   
   some kind of permanent storage even with core memory.   
      
      
   --   
   Arno Welzel   
   https://arnowelzel.de   
      
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