Patent ID: 7308507

Claim:
A method of redirecting video text data in a computer network, the method comprising: (a) during a timer interrupt for a first computer, selecting a line of video text data from among a plurality of lines of video text data stored in a video text data memory as a current line of video text data; (b) calculating a checksum for the current line of video text data; (c) comparing the calculated checksum to a previously saved checksum for the current line of video text data; (d) if the calculated checksum is different than the previously saved checksum for the current line of video text data, then determining that the current line of video text data in the video text data memory has changed; (e) saving the calculated checksum in a memory location after determining that the current line of video text data in the video text data memory has changed; (f) storing the current line of video text data in a shared memory in response to determining that the current line of video text data in the video text data memory has changed; (g) selecting the next line of video text data in the video text data memory as the current line of video data; (h) repeating the operations (b)-(g) for each of the plurality of lines of video text data stored in the video text data memory; and (i) sending only the changed video text data from the first computer to a second computer in the computer network.