Tektronix, Inc.

Sam M Deleganes

Douglas G Boyce

John D Blattner

Timothy E Bieber

Steven C Den Beste

David B Moser

Robert M Nathanson

A microprocessor system debug tool has a mainframe which interfaces with a user. A ROM emulator replaces a ROM unit of the microprocessor system to be tested and has a monitor portion which is used to perform debug functions specified by the user. A user defined control line is connected to the interrupt system of the microprocessor system to cause the target microprocessor to stop execution of the user's program and jump to the monitor portion upon the occurrence of a user defined event to execute microprocessor specific debug code generated by the mainframe in response to the user's input. At the conclusion of debug code execution the microprocessor resumes the user's program. A word recognizer is connected to the microprocessor bus to detect the results of the debug code execution, the results being forwarded to the mainframe for display to the user.

Microprocessor system debug tool

A measurement instrument has a plurality of operation levels with different respective sets of operational functions associated therewith. Each operational function has at least two independently selectable characteristics related thereto. When an operation level of the instrument is selected, the instrument displays the characteristics related to each operational function associated with the selected operation level, and the operator is able to select one characteristic related to the or each operational function associated with the operation level. The characteristics related to at least one of the operational functions may each have a single value, e.g. relating to a mode of operation of the instrument. If one of the characteristics has a range of values, a value of that characteristic may be selected within the range.

Measurement instruments with multiple operation levels

A microprocessor controlled system is provided which is responsive to displacement information such as rotation rate and position of a rotary knob for controlling instrument functions such as display scrolling, the setting and display of measurement conditions (operating parameters), and the entering and display of alphanumeric data.

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Aloha, OR, United States of America

Sam M Deleganes