Is it possible to control two computers at the same time from one peripheral (execution of commands on two PCs at once)?

Question

Software and Internet Services

There are two PCs (clones, monitors, etc., everything is the same), for example, a notepad is open on them. It is necessary to ensure that both computers are controlled from the same keyboard + mouse (note the text entered through this keyboard is written on two computers at once). Everything that I found on the Internet among programs or kvm switches is not suitable, because, as I understand it, in one unit of time I can still manage only one computer.
Is this at all possible to implement somehow? In fact, all you need is a program that repeats the actions of one PC on another, but I simply did not find such programs.

Answer 1

there is www.vetra.com/844Ukmtext.html
but I think it will not suit the money.
and softin did not meet.

Answer 2

How to make the keyboard press keys simultaneously on two computers without additional software?
(well, not exactly the same, there was a conversation about a hardware solution, but here about a software one)