LogiCORE IP Mailbox (v1.00a) Data Sheet (AXI)(DS776) - 1.0 English - In a multiprocessor environment, the processors need to communicate data with each other. The easiest method is to set up inter-processor communication through a mailbox. Mailbox features a bi-directional communication channel between two processors. This document contains information about the AXI4 version of the core.