Patent ID: 7911475

Claim:
In a display controller having a number of data ports each capable of being connected to an appropriate type video source and a processor arranged to process executable instructions and associated data, a method of partitioning a processor memory space to store extended display information data (EDID), comprising: storing the instructions executed by the processor and associated data in a first portion of the processor memory space; and storing EDID in a second portion of the processor memory space, wherein the first and the second portions are fully available for access by the data ports even when the display controller and processor are powered off; and wherein EDID is temporarily stored in a buffer memory and an arbitration circuit provides for execution of EDID read requests and client device read requests within the display controller reading from the processor memory space; and wherein when the EDID in the buffer memory reaches a low level, the buffer memory is given access to the second portion in order to satisfy pending EDID read requests.