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   alt.os.development      Operating system development chatter      4,255 messages   

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   Message 3,212 of 4,255   
   mutazilah@gmail.com to All   
   Re: com port   
   05 Aug 22 05:03:31   
   
   From: muta...@gmail.com   
      
   On Friday, August 5, 2022 at 7:21:18 PM UTC+8, JJ wrote:   
   > On Thu, 4 Aug 2022 19:36:38 -0700 (PDT), muta...@gmail.com wrote:   
   > >   
   > > If you think this would be nice, then what   
   > > would you propose exactly?   
   > I've already mentioned that. The protocol implementation should be in form   
   > of sent/received data, instead of hardware signals. Again, it not wrong, but   
   > there will be drawbacks.   
      
   I guess that's fair enough. Bochs could be   
   updated to handle that protocol.   
      
   > > And could this have been figured out decades ago?   
   > >   
   > > Or was something missing?   
   > I'm pretty sure hobbyists have done similar in the past, except that, they   
   > aren't pushlished, or we haven't heard of it.   
   > > Does error-correction belong in modems or applications,   
   > > as happened in real life?   
   > In modems, in terms of physical location (its ADC has a basic error   
   > correction). And in application, in terms of concept.   
      
   Modems don't cover potential line noise in   
   the serial cable. Doesn't the os make more sense?   
      
   > > Or does it belong in the os?   
   > It depends on the involved protocol. Hence, application implementation.   
      
   Can't the protocol go into the os and be   
   transparent to all apps in the same way   
   that writing to disk is? Is there some conceptual   
   difference between disks and serial ports?   
      
   > > If someone types:   
   > >   
   > > rm -fr /scratch   
   > >   
   > > And line noise of "enter" happens after   
   > > the "/", who failed to think things through?   
   > Error correction is not a 100% guarantee to be able to correct all errors.   
   > There are times when it's simply overwhelmed by outside force. And that   
   > includes implementations in current modern error correction algorithms. Even   
   > NASA encounters data errors.   
   > > I'm interested in changing the bios specification.   
   > >   
   > > Within the limits of the old computers.   
   > > Or close.   
   > >   
   > > Specifically I am after fopen of 0x80   
   > Well, from the OS'/firmware's point of view, a serial port is seen as a   
   > device, instead of a file. Low level thinkering would be needed to change   
   > that behavior. The question is, do you want to keep compatibility, or not?   
      
   What are my choices here?   
      
   And compatibility with what?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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