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Maintaining data coherency between a primary memory controller and a
backup memory controller
A fault tolerant memory control system is provided for a computer system having a host processor, a memory and a system interconnect. The memory control system...
A sticky leveler utilizing a window detection technique to preserve the relatively small level changes of an audio signal. The sticky leveler includes a voltage...
Method and apparatus for scan test of SRAM for microprocessors without
full scan capability
An apparatus for allowing a RAM array within an SRAM to be tested via scan ATPG is disclosed. A first clocked flip-flop has a data input latched high, a scan-in...
Method for handling an underflow condition in a processor
A method for handling an underflow condition in a processor is disclosed. A first plurality of signal data is packed into a first memory location so as to form a...
Method and apparatus for simultaneously displaying graphics and video
data on a computer display
A method and apparatus for displaying graphics data and video data, such as a video window, on a computer display. A graphics adapter chip stores graphics pixel...
Cross-domain data transfer using deferred page remapping
A cross-domain data transfer technique is disclosed in which page remapping operations are eliminated in situations where physical memory addresses can be passed...
Icon for a computer screen
Slip-on wrist case for hiking/outdoor instruments such as thermometers,
compasses, clocks, signal mirrors,...
Table top rim
Multiple bus bridge system for maintaining a complete order by delaying
servicing interrupts while posting...
A system for maintaining completion order in a multiple bus system including a bridge that posts write data includes logic units for implementing a DRAIN/EMPTY...
Apparatus and method for computing a difference in a digital processing
According to a presently preferred embodiment of the present invention, a method for processing a incoming signal comprising the steps of selecting from a first...
Device for enabling listeners to preview music recordings
A bar code reader, a wireless transceiver, an earphone jack and a battery are integrated into a pen sized device. The bar code reader is used to scan the product...
Support for printed circuit board during processing
During processing, such as wave soldering, it is necessary to support a printed circuit board (PCB) above a pallet or carrier without sagging. A support rod has...
System and method for parallel execution of memory transactions using
multiple memory models, including SSO,...
A data processor supports the use of multiple memory models by computer programs. At a device external to a data processor, such as a memory controller, memory...
Deterministic distributed multi-cache coherence method and system
An efficient streamlined coherent protocol for a multi-processor multi-cache computing system. Each subsystem includes at least one processor and an associated...
Method and apparatus for preventing a race condition and maintaining
cache coherency in a processor with...
An integrated processor includes an on-chip integrated input/output (IO) system (which does not have a on-chip bus) to handle direct memory access (DMA)...
Method and apparatus that detects and tolerates inconsistencies between
the cache and main memory, and the...
Inconsistencies between cache and memory in a memory system operating in a computer are traced and corrected. A cache entry is checked against a counterpart...
Efficient allocation of cache memory space in a computer system
An efficient cache allocation scheme is provided for both uniprocessor and multiprocessor computer systems having at least one cache. In one embodiment, upon the...
Flushing of cache memory in a computer system
An efficient streamlined cache coherent protocol for replacing data is provided in a multiprocessor distributed-memory computer system. In one implementation,...
Hybrid NUMA COMA caching system and methods for selecting between the
The present invention provides a hybrid Non-Uniform Memory Architecture (NUMA) and Cache-Only Memory Architecture (COMA) caching architecture together with a...
System and method for swapping blocks of tagged stack entries between a
tagged stack cache and an untagged main...
A computer system has a CPU, a stack cache and a main memory. The main memory is a conventional untagged memory, where each memory location is a word having a...
Method and apparatus for representing recurring events
A method and apparatus for representing and storing the schedules of recurring events. The schedules are represented by recurrence rules generated according to a...
Multiprocessing system configured to perform efficient block copy
A computer system optimized for block copy operations is provided. In order to perform a block copy from a remote source block to a local destination block, a...
Processor complex for executing multimedia functions
A computer processor complex including a hardware processor coupled to a multimedia coprocessor is provided. This computer processor complex is capable of...
Method and apparatus for interrupt communication in packet-switched
microprocessor-based computer system
An apparatus and method for handling interrupt requests from any of a plurality of interrupters to any of a plurality of interrupt handlers. Each interrupt...
Method and apparatus for refreshing file locks to minimize conflicting
accesses to data files
A system for generating and maintaining lock files to inhibit conflicting requests for data files. A first process that accesses a data file generates a lock...
Method and apparatus for efficient evaluation of semantic attributes in
A method and apparatus for compiling source code that pre-evaluates certain semantic attributes during syntactical analysis. The invention performs certain type...
Interface for telecommunications network management
An applications programming interface 20 to a telecommunications management network includes a command language interpreter 24 and a compiler 40. A command...
Test support tool system and method
A test support tool system and method produce software test programs from a logical description of selected software. Test programs are created by producing a...
Spell checking universal resource locator (URL) by comparing the URL
against a cache containing entries...
A cache, storing misspelled or otherwise incorrect network addresses from a plurality of users and associated correct network addresses, is maintained at a proxy...
Boundary-scan circuit for use with linearized impedance control type
A circuit for coupling a LIC driver to a IEEE 1149.1 boundary scan implementation includes a logic circuit that converts the data and oe signals of the IEEE...
Signal interpolation and decimation exploiting filter symmetry
Symmetry in a filter is used to reduce the complexity of an interpolator or a decimator. A weight filter matrix which includes L=(N-1)M+K weights is divided into...
Hard disk drive heat sink
A plate formed with louvers and a depression to heat engage a hard disk drive motor is attached to such a drive. Heat from the motor is transferred to the plate....
Field objects and a method for developing a graphical user interface
containing the field objects
A graphical user interface (GUI) application program has one or more screens and a number of objects hereinafter "field objects", each field object being...
Method and apparatus for analysis of particulate content of gases
A method and apparatus for analysis of particulate content of gases, applicable to the quantitative and qualitative analysis of vehicle engine emissions,...
Drilling fluid additive containing a fish oil/glycol mixture and related
A drilling fluid additive for use during drilling and excavating applications, the additive comprises a mixture of an oil, an ester alcohol, nonionic surfactant...
Disk fragmentation reduction using file allocation tables
A combined file allocation table file system (CFAT file system) uses two or more FAT file systems with different cluster sizes to form a single user visible FAT...
Estimating the degree of change of web pages
When monitoring a large number of information sources such as pages on the World Wide Web, a user may not have time to normally look at each source at regular...
Method for dynamically reconfiguring a processor
A method and apparatus for dynamically reconfiguring a processor involves placing the processor in a first configuration having a first number (m) of strands...
Using constant selectors for method identification
A process for generating method invocation instructions for a source-code program expressed in an object-oriented computer programming language is described. The...
Information appliance software architecture with replaceable service
module providing abstraction function...
An architecture for an information appliance adapted for a specific application supports a variety of appliance personalities, relying on a single core...
System and method for reducing the effects of hardware faults in a
computer system employing multiple central...
A fault-tolerant computer architecture is described wherein the effect of hardware faults is diminished. The architecture employs a main data bus having a...
On-chip PLL phase and jitter self-test circuit
An ASIC includes a PLL and digital circuitry to quantize and measure phase and average maximum jitter between a system clock input to the PLL, and a ...
Apparatus and method for improving the noise immunity of a dynamic logic
A dynamic logic signal repeater includes a complementary dynamic logic circuit with an input node to receive an input signal and an output node storing a...
Ghost-like decorative object
Decorative structures comprising a flexible sheet-like member simulate universal conceptions of the appearance of floating and fixed ghosts. A structure for...
Computer screen with a set of icons
Method and apparatus for reducing a computational result to the range
boundaries of an unsigned 8-bit integer...
The method and apparatus for checking and reducing an intermediate result signal arising from a manipulation of data signals without using conditional branches,...
Remote procedure call system and method for RPC mechanism independent
client and server interfaces...
A system and method allow client applications to invoke remote procedures on a server application using any of a plurality of remote procedure mechanisms, by...
Multiprocessing computer system employing local and global address
spaces and COMA and NUMA access modes
A multiprocessing computer system employs local and global address spaces and Non- Uniform Memory Architecture (NUMA) and Cache-Only Memory Architecture (COMA)...
System and method for preserving message order while employing both
programmed I/O and DMA operations
In a cluster of computer nodes, each node has network interface and at least one processor. Transmission of a multipart message from a first node to a second...