A process and apparatus (compiler program) carried out on a digital computer for converting a source program into an object program. The source program is entered into a first storage area of a computer. The symbolic source program is preferably first codified into computer executable code by the compiler program. The compiler program then examines each formula to determine whether it has been defined. If the first formula has been defined, it is removed from the first storage area; placed in a ...

A computer system which is especially suitable for small scale computers, and which includes a main memory, a scratch pad memory having storage locations for main memory addresses and for operands, a P register for containing the address of any storage location in the scratch pad memory currently used as a program counter, and an instruction register including a portion I for an operation code, and a portion N for the address of any storage location in said scratch pad memory. During an instruct...

An interpreter is provided which enables a user of a computer to add additional function to existing programming applications independent of the applications. The interpreter interfaces between an advanced function, such as voice synthesis, and an application, such as an office calendar and mail system. The user defines the part of the application on which to apply the voice synthesis in a high level computer language. This definition can include transformation of touch tone pulses to commands f...

Read-only memories are manufactured to include the associated microprocessor controlling program specified by, and proprietary to, the manufacturer's customers. The problem the manufacturer has of identifying each ROM and associated microprocessor with each customer is now overcome by including an assigned customer identification number in a separate small permanent register that may be read out into the data bus by an appropriate input signal. Stored program security is provided by including in...

In a microprogram controlled processor a master mask signal, generated selectively under microprogram control, synchronizes the handling of asynchronously generated interruption requests to desired sequence stages in the interpretation of program instructions. A programmed interrupt request (PIRR) associated with the interruption priority level of the program currently in control of the processor is maintained effective for a limited period of time after the associated program assumes control. T...

In the disclosed camera, an exposure value determining arrangement produces an electrical signal in response to a light measuring facility and a film sensitivity setting device. An exposure factor unit determines a combination of shutter speed and aperture value for a proper exposure in response to the exposure value determining arrangement. A control connected to the exposure factor unit varies the combination of exposure factors in the exposure factor unit in response to the set position of a ...

A control system for programming operations of a spraygun robot for spraying paint comprises a mobile control structure having jointed parts of the robot, and also possesses transducers corresponding to transducers of the robot, for transforming electrical signals respectively from and into operations of the mobile structure and of the robot. The control structure is relatively light and mobile to facilitate manual operation. The robot is sufficiently massive and heavy to permit numerous operati...

A calculator program is stored on a magnetic recording medium or in a memory such as a read-only-memory. The program is read into or coupled to a programmable calculator for controlling the programmable calculator. A calculator program security system is provided whereby a security code is stored along with the program. If the security code is set, then the program cannot be examined by an operator of the calculator but the program may still be used to control the calculator. If the security cod...

A program selector for a record player of the type having a turntable supported on a movable carrier which is actuable to move the turntable into and out of a housing, and having a tone arm which is movable across the surface of a record and controllable to play back at least a selected one of plural programs recorded on the record in separate segments which are spaced apart from each other by respecting inter-program gaps. An inter-program gap detector detects the location of each inter-program...

A microprocessor based program loader is connected to the memory data bus and memory address bus of a programmable controller. The program loader is responsive to commands entered through a keyboard to load and edit the programmable controller control program. A mode switch associated with the programmable controller provides a number of selectable positions which determine the mode of operation of the programmable controller and the functions that can be performed by the program loader. One of ...