Abstract: A network interface is described in which a single computer bus is split over a long distance into two or more inter-communicating buses. On one bus, processing and applications are provided and on the other remote bus, peripheral and local controllers are provided. The buses communicate through a series of: bridge, FPGA, FPGA and bridge. Between the FPGAs, a communication path provides long distance communication.

Abstract: A network interface is described in which a single computer bus is split over a long distance into two or more inter-communicating buses. On one bus, processing and applications are provided and on the other remote bus, peripheral and local controllers are provided. The buses communicate through a series of: bridge, FPGA, FPGA and bridge. Between the FPGAs, a communication path provides long distance communication.

Abstract: A network interface is described in which a single computer bus is split over a long distance into two or more intercommunicating buses. On one bus, processing and applications are provided and on the other remote bus, peripheral and local controllers are provided. The buses communicate through a series of: bridge, FPGA, FPGA and bridge. Between the FPGAs, a communication path provides long distance communication.

Abstract: A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color signals as a function of the delay provided by particular twist rates. In certain instances, selected signal delay devices are connected in circuit with certain twisted pairs. By such an arrangement, it has been found that relatively long distances between a computer and monitor may be spanned by relatively low-cost, twisted pair cable commonly used for telephone communications.

Abstract: A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color signals as a function of the delay provided by particular twist rates. In certain instances, selected signal delay devices are connected in circuit with certain twisted pairs. By such an arrangement, it has been found that relatively long distances between a computer and monitor may be spanned by relatively low-cost, twisted pair cable commonly used for telephone communications.

Abstract: A video graphics system wherein a large quantity of video data is independently and selectively made available to plural video display devices. The large quantity of video data can be contributed to by plural sources of video data of differing formats. Further, the display devices can also be of varying types, each requiring a different input data format. A multi-sourced video distribution element, also referred to as a hub, serves as an interface between one or more sources of video display data and one or more video display devices. One source of data can be identified as a base image, and other sources of data can be utilized for overlay images integrated into the base image. The base image and any integrated overlay images are provided on a pixel bus internal to the hub. The hub can then be configured as an interface to one or more types of video display devices and/or to another hub.

Abstract: An apparatus and method for equalizing the characteristics of a communication channel in a computer extension system. A time measurement system determines the delay time in a pair of wires connecting a computer at a first site to peripherals at a second site. The value of the delay time serves as control signal to select filters where the filters have inverse channel frequency characteristics.

Abstract: An apparatus, method, and system for providing a computer extender for connecting a computer at a first location to peripherals at a second location. The peripherals are located at distances greater than possible using standard computer cables. A cable coupling the locations and serving as the communication channel is a bundle of four pairs of wires, where three of the pairs provide video. The remaining pair provides for transfer of mouse information, keyboard information, vertical sync, horizontal sync, audio signals, modem signals, asynchronous data, and has a reserve capacity for other information.

Abstract: A non-inverting amplifier powered by a single polarity of electrical power with respect to a ground potential. Three of these amplifiers, one for each of the three basic colors, feeds three in-line adjacent conductors of a multi-conductor cable and wherein a signal to the center of these conductors is inverted. At the output end of the cable, the originally inverted signal is again inverted, after which all signals are fed to a monitor.

Abstract: A video distribution hub and display method are disclosed which is capable of driving a plurality of video display monitors as a virtual monitor or monitors. The video distribution hub receives a video signal from a single head graphics card or a suitable video source which signal embodies data within a video buffer on the graphics card or at the video source. The hub processes the received video signal and stores selected data segments corresponding to selected portions of the video buffer in a plurality of frame buffers within the distribution hub. The data stored within the plurality of frame buffers is employed to drive respective video displays, such as flat panel displays or conventional CRT displays. The hub accommodates displays of different resolution. Additionally, the hub accommodates displays having either a portrait or landscape orientation.

Abstract: An apparatus, method, and system for providing a virtual open collector circuit for a connection between a computer and computer peripherals, such as a mouse or keyboard, where peripheral data is transferred over a bidirectional communications system. The peripherals are located at distances from the computer greater than possible using typical computer cables. The apparatus has an arbitration means and a means for avoiding a lock-up condition.

Abstract: A transmission system for transmitting analog color video signals wherein a cable comprising multiple twisted pairs is employed, and certain of these pairs are coupled to carry selected color signals as a function of the delay provided by particular twist rates. In certain instances, selected signal delay devices are connected in circuit with certain twisted pairs. By such an arrangement, it has been found that relatively long distances between a computer and monitor may be spanned by relatively low-cost, twisted pair cable commonly used for telephone communications.

Abstract: A bidirectional, long-distance open collector link is constructed between a pair of spaced-apart open collector ports, with each of the ports being coupled to one input of a comparator. The other input of the comparator is responsive to a reference voltage and the comparator of the opposite port via an extended conductor. A first diode poled to pass current from the respective port is coupled between inputs of each comparator, and a second diode is coupled in the extended conductor to pass current to the opposite port. As such, when a first port goes LOW, a first comparator operatively associated with that port provides a LOW to the input of the second comparator, causing it to provide a HIGH output and also pulls the second port LOW. The HIGH from the second comparator is used to clamp the first comparator LOW as long as the port asserts a LOW.

Abstract: A converter for converting VGA color signals to gray scale monochrome signals wherein each of the color signals, red, green, and blue, are processed through a circuit consisting of an emitter-follower, a selected value resistor, and a diode and wherein the outputs of the three circuits are connected together and across a load impedance for an analog monochrome monitor.

Abstract: A cabling arrangement is disclosed for transmitting analog VGA video signals via a cable having insulated conductors and without the use of micro coaxial conductors. In this cable, the red, green, and blue video signals are applied to a first set of conductors grouped against one side of the cable. The horizontal and vertical sync signals are applied to a second set of conductors grouped along an opposite side of the cable. Interposed between the first and second sets of conductors is a plurality of conductors carrying stable potentials, such as ground potentials and identification bit potentials. The separation effected by the interposed conductors, and the interposed conductors themselves, provides effective shielding and isolation of the first and second sets of conductors.