EDID structure (base block) versions range from v1.0 to v1.4; all these define upwards-compatible 128-byte structures. Version 2.0 defined a new 256-byte structure but it has been deprecated and replaced by E-EDID which supports multiple extension blocks.[citation needed] HDMI versions 1.0–1.3c use E-EDID v1.3.[1] Before Display Data Channel (DDC) and EDID were defined, there was no standard way f