is it possible to create a runtime for a specific card, and if so how should we do?

Quote 0 0
It depends on what card or device you are talking about. If your device can run a flavor of Debian Linux, then OpenPLC should install fine just by running the normal installation script. If your device cannot run Debian derivations, then you will have to figure out a way to install all the packages required by the OpenPLC runtime before installing OpenPLC. If your device cannot run Linux at all, then there is no way to install OpenPLC runtime.
Quote 0 0