On Fri, 31 Jan 2025, Warner Losh wrote:

> > > Was that with an actual RS232 port, i.e., a device using RS232 signal
> > > levels, or a "TTL" logic level serial port?  I'm guessing the latter.
> >
> >  I'm not sure what you mean by 'a "TTL" logic level serial port', please
> > elaborate.  Do you mean signalling used between the UART and line drivers
> > by any chance, such as with a serial connection made between UARTs without
> > actual line drivers in between?
> >
> 
> Yes. That's the overwhelming majority of usage these days. At least for me
> when not dealing with retro gear.

 As a matter of interest what are the use cases if I may ask and you are 
allowed and willing to share this information?

  Maciej

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