Abstract: A register file connected to a data memory and an arithmetic logic unit for temporary storage of operands, and a method of managing such register file permits the register file to be used to maximum efficiency, and permits rapid task and context switching. Each register of the register file has an absolute address. A relative register address is read from the address field of the instruction being executed by the ALU, and an arithmetic calculation is performed on that relative register address and a register base address to obtain an absolute register address of the register to be accessed. Different sets of registers may be designated for different tasks or contexts. Each set of registers has its own base address. Once the task or context to which the instruction applies is determined, a calculation using the relative address from the instruction address field, and the corresponding register set base address may be performed to obtain the absolute address of the register to be accessed.

Abstract: The STREAMER FOR RISC DIGITAL SIGNAL PROCESSOR shown herein allows a CPU 46 to interface with a memory 60 via data registers 50. Pre-fetch and post-store of the correct address is determined by an address generator 58 according to a rule determined by a context register 52. An index indicative of this address is stored in an index register 54. The data, context, and index registers together form a streamer 56, streaming data between the CPU 46 and data memory 60. The rule of the context register 52 also drives a converter 62 for converting data between memory format and register format. The speed and flexibility of a RISC device is combined with the intensive memory access of a digital signal processor.

Abstract: A debug port in accordance with the invention provides circuitry for enabling system (hardware and software) development within an inaccessible computer processor. In one embodiment, a debug port is incorporated within the internal logic of a single-chip, reduced instruction set signal processor referred to as the signal processor. A fully implemented debug port is comprised of five interacting functional elements: debug bus unit (DBU), debug command unit (DCU), debug instruction Unit (DIU), debug inject/extract unit (DJU), and a debug flow unit (DFU). The DBU provides circuitry for buffering data received from the signal processor and other functional elements within the debug port as well as accepting data from an external source. The DBU provides for off-chip connections. The DCU provides circuitry for decoding and executing debug commands received by the debug port. The DIU provides circuitry to insert one or more instructions with, or without, data into the instruction stream of the signal processor.

Abstract: A frequency multiplexed system for coupling a plurality of individual telephone sets to at least one subscriber telephone line. The system includes a line adapter unit for controlling use of subscriber lines and for assigning the use of frequency bands to the individual telephone sets. The system includes a two-conductor interconnection cable for coupling to each of the telephone sets and to the line adapter unit. The system has a power-down mode in which the loss of external power allows each of the individual telephone sets to use the subscriber line. The line adapter unit and each of the individual telephone sets employ transconductance amplifiers so that modulated current signals are produced on the interconnection cable, thus allowing a plurality of voice signals to be summed together by voltage addition for conferencing between the telephone sets and the subscriber lines.

Abstract: There is disclosed a computer system including a storage means such as a random access memory (RAM) for receiving data to be displayed upon a display means, e.g. a color cathode ray tube, a microprocessor for control of the computer system operations, and viewer input devices such as a control stick or keyboard, whereby the viewer may respond selectively to the data displayed upon the display means. A limited capacity storage unit, illustratively in the form of a tape cassette, stores data in the form of a program for permitting the viewer to store useful material in the form of a repository, such as a Christmas list; the program to be displayed by the display means can assume any of a limitless number of programs and may be adapted to an exceptionally wide range of uses for the home, office or school. The computer system permits the viewer to respond as through the input devices, to the material being displayed, whereby subsequent material may be effected.

Abstract: An apparatus and method for predicting the time occurrence of the desired angular position of a rotating body, such as the crankshaft of an internal combustion engine. The apparatus includes means for storing a nonlinearly changing count that is set to a known starting value when the rotating body is at a known angular position. A computing means is included for computing the value of the count that corresponds to the time when the rotating body will be at the desired angular position. The computation is achieved by extrapolating from known count information based upon prior periods of angular displacement of the rotating body during periods of known duration.

Abstract: A thermocouple having a relatively long thermocouple element portion extending co-axially within an encircling sheath has said portion supported by means which, while not normally movable relative to the element, are in sliding contact with the sheath. The support is preferably one or more thin-walled ferrules secured, for example by brazing, to the thermocouple element.

Abstract: A storage unit for granular material has a first wall structure extending upwardly from a base to define connected vertical sidewalls of at least one row of first generally cylindrical bins, and a second wall structure extends upwardly from the base to define at least one row of second generally cylindrical bins spaced apart from and parallel to the first bins. A first hopper is mounted adjacent the lower end of each bin to define the respective bottom ends thereof; and a second hopper is mounted on the vertical wall in a spaced apart relationship above the first hopper to define upper and lower bins, the first and second hoppers each having discharge control means aligned with one another. Each hopper has substantially horizontal load-bearing elements mounted in substantially zero hoop-tension relationship with the vertical walls.

Abstract: A crimped deregistered tow of continuous filaments wherein the filaments are coated with a silicone finish which is substantially free of antistatic agents and the products produced therefrom such as pillow, sleeping bags, furniture cushions and the like.

Abstract: An anti-skid control system for decreasing braking distance performance of a braked wheeled vehicle while maintaining the lateral stability thereof. The system is comprised of a digital data logic processor responsive to only wheel deceleration and wheel velocity of the braked vehicle for iteratively or alternatively preselectively attenuating and restoring an applied brake fluid pressure, so as to cause the brake system performance to track the knee of the road-torque versus wheel velocity envelope as a function of time. The only parameters employed are wheel deceleration, wheel velocity and mode time for mode-switching between the several control modes (selective brake pressure attenuation and restoration) employed, while the modes themselves include preselective time-scheduling of the respective brake pressure attenuation and restoration.

Abstract: There is disclosed a computer system including a storage means such as a random access memory (RAM) for receiving data to be displayed upon a display means, e.g. a color cathode ray tube, a microprocessor for control of the computer system operations, and viewer input devices such as a control stick or keyboard, whereby the viewer may respond selectively to the data displayed upon the display means. A limited capacity storage unit, illustratively in the form of a tape cassette, stores data in the form of a program for permitting the viewer to store useful material in the form of a repository, such as a Christmas list; the program to be displayed by the display means can assume any of a limitless number of programs and may be adapted to an exceptionally wide range of uses for the home, office or school. The computer system permits the viewer to respond as through the input devices, to the material being displayed, whereby subsequent material may be effected.