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Re: USB "null modem" cables and related Linux driver questions

On Wed, 2018-06-06 at 22:26 -0600, Joe Pfeiffer wrote:
> Richard Owlett <rowlett@xxxxxxxxxxx> writes:
> > I have two computers with USB ports.
> > I wish them to communicate as simply as mid-20th-century computers
> > did.
> > Then we used RS232-C with a null modem &/or  appropriate software
> > software at both ends.
> > 
> > The underlying problem is that both ends egotistically expect to be
> > *MASTER*.
> > 
> > The hardware problem is solvable
> > [e.g. http://www.ftdichip.com/Products/Cables/USBtoUSB.htm].
> Given how FTDI does things, I'd be really surprised if this didn't
> meet
> your desires.  Have you actually tried it?  Are you sure there is no
> driver in the kernel?

There is a driver in Linux because, from what the datasheet says, that
cable is two of FTDIs standard USB-to-serial chips wired together. I.e.
it's equivalent to getting 2 USB to serial cables and connecting them
with a null modem cable.