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5023778 |
Interprocessor communication method
A communication method provides for an exchange of a multiple byte message between two processors. Interrupt suppression associated with the message transfer is minimized by alternating the...
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5007017 |
Method and apparatus for data communication through composite network
Data communication through a composite network constituted by a plurality of mutually connected individual networks. When a center connected to a first network such as a wide-area telephone network...
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4992934 |
Reduced instruction set computing apparatus and methods
A reduced instruction set computer (RISC) with a Harvard architecture is disclosed. The RISC may be designed to be used simply as a RISC or may be designed to be used to emulate a complex...
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4975830 |
Computer communication system having supplemental formats
A computer communication system including a comunication medium, a plurality of nodes coupled to the communication medium, and a transfer format selection means for selecting a format for the...
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4974159 |
Method of transferring control in a multitasking computer system
An improved method and system for transferring control in a multitasking computer system is provided. In preferred embodiments for use with 80386 machines, the virtual machine monitor (VMM) writes...
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4951245 |
Network terminal driver communications subsystem
In a data processing system having a plurality of remote terminals, possibly of several kinds, connected by a plurality of communications media, also possibly of several kinds, from which terminals...
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4949300 |
Sharing word-processing functions among multiple processors
A central processor holds a word-processing program and an entire document to be processed. A personal computer or intelligent terminal has an interactive display and holds code for some functions...
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4939507 |
Virtual and emulated objects for use in the user interface of a display screen of a display processor
A user interface is represented on the display screen in the form of metaphoric objects, called icons, with which the user can interact by changing the input focus to a designated object by...
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4937036 |
Concurrent display of data from two different display processors and user interface therefore
A multiprocessor system comprises concurrent display of video data reflecting the operation of two processors in discrete portions of a single display screen with a user interface adapted for...
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4899306 |
Test interface circuit which generates different interface control signals for different target computers responding to control signals from host computer
A general purpose computer test interface is used to test various types of computers having differing input/output characteristics. The interface comprises a control unit which is responsive to...
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4888680 |
Peripheral device interface and controller
A port emulator circuit implemented on an Apple II peripheral card which enables MS-DOS programs designed to run on an 8086 microprocessor based IBM type personal computer to perform input/output...
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4876639 |
Method and circuitry for causing sixteen bit microprocessor to execute eight bit op codes to produce either internal sixteen bit operation or internal eight bit operation in accordance with an emulation bit
A sixteen bit microprocessor includes an emulation bit that is loaded into an instruction register with 8 bit op codes. If the emulation bit is a "1", the 16 bit microprocessor operates internally...
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4858114 |
Emulation system for automatically modifying I/O translation tables in programs designed to run on different types of computer
A technique for providing automatic modification of a computer application program adopts the program for compatibility with hardware different from that for which the program was originally...
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4855905 |
Multiprotocol I/O communications controller unit including emulated I/O controllers and tables translation of common commands and device addresses
The improved I/O controller includes a data processing element for executing a sequence of stored program instructions to control the transfer of data between respective ones of a plurality of I/O...
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4852041 |
Interface converter
An interface converter for mutually converting between a first serial interface, such as RS-232-C interface, and a second serial interface, such as RS-422-A interface. The interface converter...
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4847805 |
Microcomputer development system
A development system for a family of one-chip microcomputers which are all of the same architecture but differ in the memory size and the input/output number, comprises a common emulation chip...
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4812975 |
Emulation method
A method for emulating programs in a system includes a plurality of first and second data processors having different instruction word sets. An instruction which interrupts the operating system on...
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4809167 |
Circuitry for emulating single chip microcomputer without access to internal buses
An emulator circuit utilizes an Intel 8031 microprocessor with external address and data buses to emulate an Intel 8051 single chip microcomputer with no external buses by providing external...
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4803651 |
Method for encoding and decoding acyclic, linked-list data structures for efficient storage, retrieval and searching
To encode hierarchial information the invention recognizes that there is implicit information which must be made explicit. Thus the hierarchial information is annotated by selectively adding to it...
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4788657 |
Communication system having reconfigurable data terminals
The disclosed communication system enables communications between reconfigurable data terminals and a variety of connected computers, having dissimilar operating parameters, by automatically...
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4780821 |
Method for multiple programs management within a network having a server computer and a plurality of remote computers
The procedure which allows users of a computer system comprising a plurality of computers connected in a local area network to share both file resources and application programs on the local area...
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4771376 |
Processor
Computers are formed with different architecture to attain optimum functions or performances according to the usage and objects. For standardization of processors for implementing predetermined...
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4763242 |
Computer providing flexible processor extension, flexible instruction set extension, and implicit emulation for upward software compatibility
A computer and an instruction set are presented which allow for a number of assists to be easily incorporated into the computer, and which allow for an instruction set extension. The computer is...
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4713779 |
Video converter
A device for converting display parameters adapted for use with a personal computer having a display defined by a first set of parameters to a display having a second set of parameters. The...
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4709328 |
Composite data-processing system using multiple standalone processing systems
Two different data-processing systems are interconnected into a composite system by a shared memory in the address space of each, and by a virtual channel which generates interrupts so that each...
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4688170 |
Communications network for communicating with computers provided with disparate protocols
A global data network communication system for communicating between diverse computer systems, each system provided with different protocols used to transmit, receive and understand information. At...
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4660143 |
Programmable realtime interface between a Block Floating Point processor and memory
The programmable interface gives a Block Floating Point processor the capability of performing various real-time signal algorithms on collected radar data in an external batch memory. Normally,...
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4654789 |
LSI microprocessor chip with backward pin compatibility
A chip implemented in newer technology is designed to include new functionality. The chip includes compatibility circuits which connect to a pin which is unused in the chip it replaces in an...
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4611277 |
Microcomputer communications software
Disclosed is a microcomputer communications software implementation for controlling the transfer of data between a microcomputer and a host mainframe computer in various modes of operation,...
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4604686 |
Associative data access method (ADAM) and its means of implementation
An input/output driver program residing in digital computer apparatus responsive to Pascal type of software and which operates to emulate an asychronous terminal, as opposed to bisynchronous...
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4604710 |
System for converting data processing information to text processing format and vice versa
A method and control apparatus for operating an interactive text processing system wherein the system emulates a terminal for a data processing system which is capable of accessing information from...
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4600989 |
Universal computer, recorded video interface
An interface computer having an RS232 port for connection to a host computer. The recorder is connected to the interface computer by a control cable providing more lines than required. The source...
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4595911 |
Programmable data reformat system
A high speed system utilizing programmably controlled ranks of multiplexers for reformatting data from programmably selected first formats to second formats is described. Interleaved input data is...
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4590551 |
Memory control circuit for subsystem controller
A dual set of memory control circuit cards, one of which services a master processor and one of which serves a slave processor in a data communication Network Support Processor. Each memory control...
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4586159 |
Digital bus adaptor
A bus adaptor is a circuit which interconnects incompatible digital systems hat are asynchronous to each other, through alteration of bit order arrangement and composition, time frame, speed and...
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4574362 |
Block mode digital signal conditioning method and apparatus
Block mode is a method of formatting data when sending it to and from the host computer. Some host computer operating systems make it difficult for the user's program to send or receive the full...
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4519030 |
Unique memory for use in a digital data system
A digital data system having a memory with a unique multi-ported memory I/O means. Separate means are provided for communicating with any of several buses. Address information, operands,...
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4513373 |
Local area network
A local area network (10) includes a communications switch multi-port selector (12) which functions as the hub of the network. There are connected to the selector (12) various types of stations...
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4509113 |
Peripheral interface adapter circuit for use in I/O controller card having multiple modes of operation
This adapter contains two separately controllable sections, each transferring data in various formats between a peripheral device interface and either a microprocessor contained in an associated...
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4499536 |
Signal transfer timing control using stored data relating to operating speeds of memory and processor
A memory controlling apparatus retains time information prepared based on performance of a memory and a processor, and determines timing of signal exchange between the memory and the processor...
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4435763 |
Multiprogrammable input/output circuitry
A electronic digital processor system input/output circuitry including several input/output data ports where each port contains receiving circuitry to receive bit data from bit data pads and...
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4403303 |
Terminal configuration manager
A terminal configuration management system manages the configuration of a microprocessor-based computer terminal which includes three types of memory elements: non-volatile read only memory,...
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4390947 |
Serial line communication system
A serial line communication system is provided whereby a plurality of remote units are tied to a central site through a serial communication line. Each remote unit is provided with an automatic bit...
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4370708 |
Logic system for selectively reconfiguring an intersystem communication link
A logic control system in an intersystem link (ISL) unit accommodating the transfer of binary coded information between communication busses in a data processing system is disclosed, wherein an ISL...
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4322844 |
Transmitter-receiver synchronizer
A transmitter-receiver synchronizer is described for use in terminating T1 lines from a subscriber line switch at a central time division multiplexed switching system. A shared rate converter...
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4277827 |
Microprocessor based system for the development and emulation of programmable calculator control read only memory software
A microprocessor based system for both creating and emulating control read only memories (CROM) for use in conjunction with programmable calculators and the like. The development system operates as...
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4229789 |
System for transferring data between high speed and low speed memories
A data transfer or replacement system for shifting blocks of data or pages between a high speed, low capacity, working memory and a low speed, high capacity backup store of a data processing...
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4053946 |
Modular programmable digital scan converter
A digital scan converter which comprises modular video processing units and modular memory and output units is adapted for processing applied sensor data of various formats so as to provide output...
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3997895 |
Data processing system with a microprogrammed dispatcher for working either in native or non-native mode
A data processing system having a common data bus to which access is gained by at least a control store, an arithmetic logic unit (ALU) and an emulator unit (EMU). The control store includes a...
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3863270 |
HYBRID COMPUTER SYSTEM INCLUDING AN ANALOG CALCULATOR FOR RAPIDLY GENERATING ELECTRIC POWER SYSTEM LOADFLOW SOLUTIONS
A hybrid loadflow computer arrangement includes a modularized analog network simulator and a digital computer which acquires and processes on-line data and operator data related to the power system...
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