Abstract: A symptom compression device receives binary coded information including bits signifying symptoms present in the course of each operating cycle at selected points in an integrated logical network, microprocessor or the like. The device includes a first register, a second shift register, an EXCLUSIVE OR logic network, and a display. The binary coded information is received on parallel inputs of the first register and applied from parallel outputs of the first register to a set of inputs of the EXCLUSIVE OR network, a second set of inputs which is connected to at least some parallel outputs from the second shift register. A set of outputs from the EXCLUSIVE OR network is connected to parallel inputs of the second shift register. In each cycle, the bits in the second shift register, which accumulate information representative of symptoms, are shifted in one direction and are recirculated. The display is connected to the parallel outputs from the second shift register.

Abstract: A mechanism, including a memory, sequences operation in a controlled processor. Each operation is stored in memory together with a portion indicating the current state of predecessor operations required to be completed before execution of the current operation. Also associated with the current operation is provision for at least one address of a successor operation. A predecessor portion is updated as the predecessor operations are performed and at a predetermined state, the current operation is sent to the controlled processor for processing. Following the processing, the operations at the successor addresses have their predecessor portions updated. Thus, the order in which the operations are performed is totally independent of an arbitrary sequencing and instead is dependent only upon availability.

Abstract: A data transmission system which includes stations connected in a closed loop configuration with interface capabilities at each station to connect to an external data processor. Through this configuration simultaneous transmission of data among processors connected to stations on the loop can be carried out by transmission of data around the loop between particular stations. Data is transmitted from a first processor to its individual station connected to the loop. This first station formats the data received from the first processor into frames of multi-bit configuration which are transmitted around the loop to a second station which is connected to a second processor. Data received by the second station is stored and transmitted to the second processor. During the time that this transmission from the first processor to the second processor is being carried out a transmission between other processors connected to stations on the loop can also be carried out.

Abstract: A device is provided for printing a verbal composition in a text form transposed by an operator from the language form in which the source material is presented. Language character forms from different written language formats are encoded and maintained in electronic storage. An operator of the device selects a particular language character from a desired language character font in a single or multiple step selection process to appear at sequential locations of the text during composition of the text. The material to be transposed may be originally presented orally or visually, and is translated or transposed into a different language, or, in the case of some languages, particularly oriental languages, the text may be composed of different language character forms of the same spoken language. For language character forms that utilize a great multiplicity of characters, as opposed to language forms utilizing a relatively few alphabetic or pneumonic characters, a second order selection is made.

Abstract: A film card retrieval device for use in an automatic microfilm display apparatus is provided with a switch for sensing that a film card has been retrieved. In the event the device fails to retrieve a film card, the absence of a switch output signal causes the control apparatus to repeat the card retrieval routine.

Abstract: Improved means and methods for providing highly flexible microinstruction sequencing in a microprogrammed digital data processing system particularly with regard to the handling of specialized types of sequencing situations such as are involved in wait-loop and repeat situations. The microprogramming control system is implemented using a plurality of programmable read only memories storing control words chosen so as to provide for microinstruction sequencing in a manner which in the first instance assumes that no branching possibilities are present, even though one or more branching possibilities may in fact be present in the microinstruction flow path, thereby permitting very fast microinstruction sequencing when the assumed sequencing is correct.

Abstract: An adapter for use with a host processor for processing interrupts between a host processor and a plurality of remote data terminal devices is disclosed. The adapter includes a microprocessor, counter means which is incremented by a clock for sequentially interrogating a plurality of remote data terminal devices to determine whether or not a remote device is requesting access to the host processor and an external buffer for storing the output of the counter. The output of the counter is transferred to the microprocessor upon the sensing of a request signal for use by the microprocessor in identifying the requesting remote data terminal device and for processing the data from the requesting device to the host processor. The operation of the counter means is controlled by the microprocessor in accordance with the availability of the microprocessor to service the requesting data terminal device.