Patent ID: 6342893
Filing Date: 2002-01-29
Classification: G06F,G09G

Abstract:
A method of testing a correctness of image data transited between a computer system memory and a display memory, said method comprising the following steps of:storing first image data at a first location of said computer system memory; transiting said first image data into a second location of said display memory for generating second image data; transiting said second image data stored at said second location of said display memory into a third location in said display memory for generating third image data; transiting said third image data stored at said third location of said display memory into fourth location of said computer system memory for generating fourth image data; comparing said first image data stored at said first location and said fourth image data stored at said fourth location of said computer system memory; and comparing said second image data stored at said second location of said display memory with said first image data stored at said first location of said computer system memory when said fourth image data stored at said fourth location is not consistent with said first image data stored at said first location in order to determine whether at least one mistake occurs in transiting procedure.