摘要:
Method and apparatus for a scalar data cache in a scalar/vector supercomputer. The scalar data cache comprises a cache array and a cache controller. The cache array comprises a plurality of cache frames; each cache frame comprises a plurality of cache lines; and each cache line comprises a plurality of data words. The cache controller performs a broadside compare of the reference address against all addresses held in the cache, and translates the reference address into a cache-array address. For each cache line, there is a corresponding cache-line validity indication which is set "valid" only when every data word in the cache line contains valid data. A cache-line validity comparator operates to provide a cache-line-hit indication if a data word requested is in a valid cache line. A cache-load controller is described for loading data from a common memory into every data word of a cache line and for marking the cache line "valid". For at least one of the plurality of scalar registers, a cache accessor is described for providing fetch access to the data words in the cache array, and for providing write-through-cache capability to the data words in the cache array.
摘要:
Conventional scanners used in thermal imagers scan the image along curved lines rather than straight lines, resulting in image curvature in the display. The invention eliminates this by processing the video signal from the scanner to compose an output video signal which represents scanning along straight lines (18) across the image. The output signal is composed of a number of successive portions (A to F) each derived from a different line or lines of the video signal provided by the scanner.
摘要:
A twin polygon thermal imager is provided with a compensator for compensating for horizontal distortion in the image produced on a CRT. The distortion compensator applies an amount of correction which is determined, in each horizontal line, to compensate for the particular magnitude of the distortion in that line. The amount of correction needed is determined as a function of the angle between the rotational axis of the polygons and the particular facets thereof producing the particular video line. Compensation is achieved by adjusting the timing and the frequency at which digital video data is read-out from a signal store.
摘要:
Thermal imaging apparatus particularly but not exclusively for use on an aircraft with a head-up display is provided with signal processing means which progressively expands or compresses the image in the vertical and/or horizontal direction to compensate for parallax arising from the difference in the positions of the observer and the scanner. The adjustment is performed, in the preferred embodiment, as a function of height of the aircraft.
摘要:
In optical scanning systems loss in spatial resolution can result in coupling systems incorporating off axis concave mirrors by virtue of image rotation. In such systems compensation can be introduced for this image rotation by inclining the axis of oscillation of the scanning mirror at a small angle to the plane of that mirror.
摘要:
In an electronic musical instrument of the type having keys, a system for controlling the volume of the sound produced by the instrument when the keys are depressed or struck. For each key, the system comprises a tone generator, a gate coupled between the tone generator and the speaker of the instrument; and control means for producing a control signal having an amplitude which is a function of the speed at which its associated key is moved while being depressed. The control signal is applied to the gate to pass the output of the tone generator to the speaker and to control the volume of the sound produced by the speaker.
摘要:
In a computer system having a scalar processing unit and a vector processing unit, wherein the vector processing unit includes a vector dispatch unit, a system and method of decoupling operation of the scalar processing unit from that of the vector processing unit, the method comprising sending a vector instruction from the scalar processing unit to the vector dispatch unit, wherein sending includes marking the vector instruction as complete if the vector instruction is not a vector memory instruction and if the vector instruction does not require scalar operands, reading a scalar operand, wherein reading includes transferring the scalar operand from the scalar processing unit to the vector dispatch unit, predispatching the vector instruction within the vector dispatch unit if the vector instruction is scalar committed, dispatching the predispatched vector instruction if all required operands are ready, and executing the dispatched vector instruction as a function of the scalar operand.
摘要:
Method and apparatus for a logical address translator which translates a logical address into a physical address in a computer. The computer includes a plurality of address ports. Each address port includes a logical address translator, which includes a plurality of segment-register sets. Each segment-register set holds values which specify address boundaries and translation mapping of a corresponding logical segment. A segment detector is coupled to the plurality of segment-register sets, wherein the segment detector operates to determine whether the logical address is within the specified address boundaries of the logical segment. An address mapper is coupled to the plurality of segment-register sets, wherein the address mapper operates to translate the logical address into a physical address. A translation controller is connected to the segment detector and the address translator, wherein the translation controller operates to output the physical address if the segment detector determines that the logical address is within the specified address boundaries of the logical segment. One embodiment of the segment-register set includes a base address, a limit address, and a physical mapping bias. One embodiment of the computer includes a plurality of address ports, wherein each address port includes a logical address translator.
摘要:
Improved performance is obtained in computers of the type having vector registers which communicate with one or more functional units and common memory. As elements of a vector are read from a vector register for transmission to common memory or as operands to a functional unit, the vector register immediately becomes available to receive and store elements of a vector from common memory or a functional unit. The element-by-element storing takes place simultaneously with the element-by-element reading, and trails the reading by at least one element so as to not overwrite elements yet to be read. Through the use of this technique a vector register can be loaded with a vector for a subsequent operation without having to wait for the completion of the previous operation which uses the same vector register.
摘要:
The invention comprises a plurality of stacked planar processing circuit boards surrounded on at least one side by a plurality of memory boards located substantially perpendicular to the planar processing boards, the processing and memory boards connected by orthogonal interconnect modules. The orthogonal interconnect modules allow closely-spaced orthogonal connection of the processing boards to the memory boards. The memory boards are of a densely packed design having a plurality of removeable memory chip stacks located on the memory boards.