Abstract: A computer system that utilizes a method that manages the flow of information between a memory storage area, a display screen, and a cache. The information flow within the computer system is managed by monitoring the initiation of the display screen blanking interval and then selecting a data entry in the cache which corresponds to display memory during the display screen blanking interval, and flushes the contents of that data entry to the memory area. The process repeats for each such data entry in the cache.

Abstract: A set top box for digital audio/video interactive decoding in an interactive television system is disclosed. The set top box includes means for connecting to an interactive television system as well as means for connecting to a television set. The set top box includes a CPU on which is run a real time operating system. The operating system is comprised of modules of code. Each module of code makes up a portion or component of the overall system. A description record is created for each module which includes the device type and device name and can also include the device parameters. The description records are stored in a configuration description block. The description block is stored in RAM and can be updated at any time. If a new system module is downloaded from the interactive television system, a description record corresponding to the new module can be added to the description block.