For up to date details of the LPC RRF port V3 please see following links: https://github.com/gloomyandy/RepRapFirmware/blob/v3.01-dev-lpc/WHATS_NEW_LPC.md https://github.com/gloomyandy/RepRapFirmware/wiki
This file is no longer maintained. See https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x instead.