Patent
Microprocessor based digital to digital converting dataset
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TLDR
In this article, a microprocessor based, digital to digital converting, full duplex time division multiplexing data set operating in burst mode transmission interfaces a data terminal to a communication path for communicating with another data terminal.Abstract:
A microprocessor based, digital to digital converting, full duplex time division multiplexing data set operating in burst mode transmission interfaces a data terminal to a communication path for communicating with another data terminal. The data set includes a transmitter, a receiver, a controlled transmit/receive switch, digital logic control circuitry, and a microprocessor for communicating with and controlling the other elements thereof. Communication is based on a bipolar code, and bipolar violation encoding is used to signal special messages. Control words, indicated by bipolar violations, are generated within one data set and transmitted to another data set as a preamble to a bipolar violation for communicating information to, and controlling operation of, the other data set. Special start and stop bits are generated by the data set before and after each fixed length data block for clock synchronization and DC balancing, and are stripped from the data clock by the receiving data set. Circuitry is also provided for generating a DC balance bit within each preamble to a bipolar violation. Specific logic circuits and control programs cooperate in providing system operation.read more
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References
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Patent
Asynchronous communication interface adaptor
TL;DR: An integrated circuit asynchronous communications interface adapter (ACIA) as discussed by the authors includes circuitry on a semiconductor chip for interfacing with a bidirectional data bus of a microcomputer, which is used for data transmission between the microcomputer data bus and a transmit data register and a read data register on the ACIA chip.
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Asynchronous bidirectional direct serial interface linking a programmable machine function controller and a numerical control
TL;DR: In this article, an interface for serially transmitting single-bit contact information between a programmable machine function controller and another numerical control is proposed, where the contact interface is divided into a machine controller interface and a numerical control interface.
Journal ArticleDOI
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Simon Huon,Robert S. Smith +1 more
TL;DR: In this paper, the authors describe the design objectives, implementation decisions, and design rationale for implementing these characteristics in the IBM 3863, 3864, and 3865 family of data modems.
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