Re: serial console

["mick.crane" <mick.crane@gmail.com>]

On 2025-07-31 01:46, Greg Wooledge wrote:
> On Thu, Jul 31, 2025 at 01:38:15 +0100, mick.crane wrote:
> > serial console/ parallel is likely me not understanding terminology.
> > These Raspberry Pis, Arduinos with the connection with all the pins, 
> > what
> > protocol is that expecting?
>
> A serial cable usually has a 9-pin (DB-9) connector on each end.
> A parallel cable usually has a 25-pin (DB-25) connector on one end,
> and either another DB-25 connector or a mini-Centronix connector on the
> other end.
>
> See pictures at <https://en.wikipedia.org/wiki/Parallel_port>.
>
> Typically, parallel ports have been used for printers.  The Iomega Zip
> drive also had a parallel port interface, but wasn't super popular.

I had two or three of those Iomega zip drives, must have been handy for 
something.

> Serial ports have commonly been used for teletypes/terminals, mice,
> and a wide variety of other instruments and devices.

I find that with instructions the basic stuff ( like why) is often 
missing.
So with these Blackberry Pis, Arduinos the thing with all the pins is a 
parallel port for sending and receiving signals to control some other 
device and there's some other connection to connect to a console 
emulation on a PC, and keyboard on PC sends instructions via console 
emulation?
mick