I have failed to find a good diagram or explanation of how a P2PE solution manifests itself within a point-of-sale (POS) device. Is it software running in a process on an embedded OS that knows how to communicate with the card reader? Or is it software that has been loaded into the card reader? Or what?
Related to this is that I failed to find a good diagram or description of how the various sub-components of a POS device relate to each other. Presumably there is an OS (maybe embedded) and various I/O devices, and maybe some processes that have nothing to do with cardholder data.
Related to this is that I have failed to find a good description of the differences and relationships between the following: P2PE, PIN pad, PTS, POS, payment terminal.