Patent ID: 6295053
Filing Date: 2001-09-25
Classification: G09G

Abstract:
A device for reprogramming the function of a monitor, comprising:a set of video graphic adapter (VGA) signal lines for transmitting a plurality of erase/record commands and a plurality of erase/record data;a signal detector coupled to the VGA signal lines for detecting and re-transmitting the erase/record commands and data;an activation device coupled to the signal detector, wherein the activation device is normally connected to a video pathway, but as soon as erase/record commands are detected, the activation device is switched to an erase/record pathway so that erase/record commands and data can be re-directed;a read-only-memory (ROM) erase/record command decoder connected to the activation device via the erase/record pathway, wherein the decoder translates the erase/record commands into a plurality of erase/read/write signals and translates the erase/record data into a plurality of address signals and a plurality of data signals;a ROM unit coupled to the ROM erase/record command decoder, so that data stored in the ROM unit can be modified data according to the address, data and erase/read/write signals coming from the command decoder; anda mode return device coupled to the ROM erase/record command decoder and the activation device, wherein the reprogramming status of the ROM unit can be determined from the address, data and read/write signals so that the activation device can be triggered to switch over connection from the erase/record pathway to the video pathway as soon as reprogramming is finished.