Inter-WIZ communications part II - page 1

In this section we are going to look at a few more OS commands, in particular relating to  "block transfers": send block, recv block, send block direct, and recv block direct.

These OS commands allow large blocks of data to be sent rapidly between any two WIZes on a chip, without having to go through the OS for each data word. Additionally, the "direct" version of these commands causes the OS to completely "get out of the way" and allows two WIZes to essentially take over the OS WIZ's bus, creating an extremely fast and efficient block transfer between WIZes.