A technique for integrity error detection in a temporal transaction oriented database system. The database system has records and processing rules. Each record has an effective time. Each processing rule has a range of effective times. The record types include transaction records, master records, shadow master records and snapshot records. Each transaction record or snapshot record is related to one master record and each master record may have a plurality of related transaction and snapshot rec...

A display management system for use with a computer that includes a display system, the display management system including means for generating a representation of a desired screen image; means for periodically updating the display system to display the desired screen image that corresponds to the state of the representation existing at the time of the update; and means for changing the representation so as to record the cumulative effect of a plurality of successive changes that are made to th...

According to a first aspect of the invention, a DASUM (Durable Atomic Storage Update Manager) provides an extensible framework assuring complex changes to persistent storage of data within a computer system, including a distributed computer system. During normal runtime, modifications to permanent storage are broken down and organized as a plurality of simpler transactions. These simpler transactions are accomplished atomically by executing associated agents within the computer program under exe...

According to a first aspect of the invention, a DASUM (Durable Atomic Storage Update Manager) provides an extensible framework assuring complex changes to persistent storage of data within a computer system, including a distributed computer system. During normal runtime, modifications to permanent storage are broken down and organized as a plurality of simpler transactions. These simpler transactions are accomplished atomically by executing associated agents within the computer program under exe...

A dot printer receives coded printing information, and expands it into dots in an image memory. When expanding the information into dots, the printing contents of the previous printed document and the new printing document are compared as to their coded information. Only the changed portions therebetween are rewritten in the image memory. As a result, the printing efficiency with respect to multiple documents of the same type in which only small portions thereof change is improved.

A position measurement system includes position error circuitry (PEC) that responds to periodically provided actual position information and a computed position to provide correction information, and a position synthesizer which responds to the correction information to provide the computed position. The computed position information is fed back to the PEC. The position synthesizer establishes a rate of change of the computed position based on the correction information in a manner tending to ma...

A network device includes one or more processing units and an external memory. Each of the one or more processing units includes a centralized counter configured to perform accounting for the respective processing unit. The external memory is associated with at least one of the one or more processing units and is configured to store a group of count values for the at least one processing unit.

A method of updating image frames to a display screen. A display system comprises a display screen, a frame memory for buffering the image frames prior to a transfer to the display screen, a display interface for receiving the image data into the frame memory, a separate controller for inputting the image data in the frame memory, and a display driver for controlling the display system. Image data are transferred by means of the separate controller to the display screen, after which a synchroniz...

The homepage creation and update program allows the user to perform only selection of desired images and indication of beginning of homepage creation process to automatically create a homepage easily. The homepage creation and update program possesses a function of displaying plural stored images and allowing the user to select desired images, a function of allowing the user to indicate beginning of the homepage creation process, and a function of automatically creating or updating a homepage us...

A method for atomically updating Error Detection Code (EDC) protected data in memory such that the EDC protection is maintained to the granularity of a single microprocessor machine instruction. The method is employed in a memory system having a volatile storage area and at least one nonvolatile storage area, each of the storage areas storing a copy of the protected data and two copies of its associated error detection code. The volatile and nonvolatile storage areas each have a first storage lo...