Abstract: The invention encompasses a system and method for serially transferring a sequence of data bits having binary values. This includes a step of displaying sequential display frames on a frame-scanning graphics display device, wherein each sequential display frame is associated with an individual group of data bits. Each group of data bits is associated with one or more data framing bits. The framing bits are inverted from one sequential display frame to the next. Within each display frame, sequentially-scanned data transmission lines are selectively illuminated to represent the individual groups of data bits associated with the display frames and their associated data framing bits. Bits having a first binary value are represented by illuminated display frame lines. Bits having a second binary value are represented by non-illuminated display frame lines.

Abstract: The invention includes systems and methods for calibrating bit transmission rates in a computer system which uses selected raster lines of a frame-scanning display device for serial data transmission to an external receiving device. A system in accordance with the invention includes a data processor and a frame-scanning display device having a total number of available raster lines per display frame. The computer also has an internal timer which is set to generate timing signals at a predetermined frequency. The data processor is programmed to count the number of timing signals and the number of frame scans of the frame-scanning display device which occur during a selected measurement period. The selected measurement period is preferably defined by the occurrence of a predetermined number of frame scans.