Abstract: This disclosure relates to a programmable unit employing plural levels of sub-instruction sets in addition to conventional instruction sets. The conventional level of instruction sets is employed to specify computational routines and other processing algorithms to be carried out by the unit. Each instruction in a conventional set is implemented in the unit by a sequence of first level sub-instructions which specify the various operations to be carried out within the unit which operations are comprised within the specific routine. In turn, the various first level sub-instructions are implemented by second level sub-instructions which specify the various control signals required to set the various gates as required for the particular unit operation to be carried out. With this hierarchy of sub-instruction sets, first level sub-instruction sets may be interchanged dynamically during the operation of the unit to dynamically change the processing capability of the unit.

Abstract: A loop controller for a data communication network system formed by interconnecting a group of heterogeneous computers, batch terminals and conversational terminals in a ring or loop configuration. Each computer or terminal is connected to the communication network via a communications processor and an interface unit termed a node. The communications processor is responsible for network protocol and activities as well as for interfacing devices to the network. The node provides the only connection to the ring or loop and derives the clock for the communications processor as well as the node itself from the transmitted data. The logocontroller combines timing signals and information signals and forms a sequential stream of alternating control and data characters, each character being n-bits in length. This stream is then placed on the loop for serial transmission to the individual nodes connected to the loop. Signals received by the loop controller are synchronized for retransmission back to the loop.

Abstract: A data communication network system for interconnecting a group of heterogeneous computers, batch terminals and conversational terminals employing serial transmission techniques in a ring or loop configuration. Each computer or terminal is connected to the communication network via communications processor and a interface unit termed a node. The communications processor is responsible for network protocol and activities as well as for interfacing devices to the network. The node provides the only connection to the ring or loop and derives the clock for the communications processor as well as the node itself from the transmitted data. All information in the communication network is transmitted in a modified Mauchly format and will appear as n-bit data or control characters. A control character, which always precedes a data character, will either be the address of a node or a null. To read information from the network, the node must detect a control character which represents its address.

Abstract: A method of data communications for use in systems employing serial transmission techniques in a ring or loop configuration. Access to the communication network is via a communications processor and a interface unit termed a node. The communications processor is responsible for network protocol and activities as well as for interfacing devices to the network. The node provides the only connection to the loop and drives the clock for the communications processor as well as the node itself from the transmitted data. All information in the communication network is transmitted in a modified Mauchly format and will appear as n-bit data or control characters. A binary ONE is represented as a signal level transition from one level to another, while a binary ZERO is represented by an opposite signal transition. A control character, which always precedes a data character, will either be the address of a node or a null.

Abstract: This disclosure relates to a programmable unit employing plural levels of sub-instruction sets in addition to conventional instruction sets. The conventional level of instruction sets is employed to specify computational routines and other processing algorithms to be carried out by the unit. Each instruction in a conventional set is implemented in the unit by a sequence of first level sub-instructions which specify the various operations to be carried out within the unit which operations are comprised within the specific routine. In turn, the various first level sub-instructions are implemented by second level sub-instructions which specify the various control signals required to set the various gates as required for the particular unit operation to be carried out. With this hierarchy of sub-instruction sets, first level sub-instruction sets may be interchanged dynamically during the operation of the unit to dynamically change the processing capability of the unit.

Abstract: This disclosure relates to a programmable unit employing plural levels of sub-instruction sets in addition to conventional instruction sets. The conventional level of instruction sets is employed to specify computational routines and other processing algorithms to be carried out by the unit. Each instruction in a conventional set is implemented in the unit by a sequence of first level sub-instructions which specify the various operations to be carried out within the unit which operations are comprised within the specific routine. In turn, the various first level sub-instructions are implemented by second level sub-instructions which specify the various control signals required to set the various gates as required for the particular unit operation to be carried out. With this hierarchy of sub-instruction sets, first level sub-instruction sets may be interchanged dynamically during the operation of the unit to dynamically change the processing capability of the unit.