The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 1991
Filed:
Mar. 30, 1987
Yasuko Nakayama, Kawasaki, JP;
Kazuo Aida, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A program counter display device having a program memory which stores a source program. An interpreter reads out the source program from the program memory and executing it. A program list generator generates a program list of the program stored in the program memory, and a program flow monitor having knowledge of the program flow determines the program flow in accordance with the statement currently being executed. A control structure monitor correlates the current statement supplied from the interpreter with a program control structure, and checks the balance of the program control structure such as the existence of an end in a loop structure, the existence of a destination of a branch sentence, etc. A program counter-mark generator connected to the program flow monitor and the control structure monitor generates a program counter mark indicating the program counter function, the program flow, and the control sturcture. A display device connects to the program list generator and to the program counter mark generator and displays the program counter mark in association with the program list. The program counter mark is constituted by a box section which is displayed over the range of the program list included in the program control structure. A direction-indicating section is displayed within the box section, and indicates which statement is currently being executed, and also the direction of program flow. When the arrow of the direction-indicating section is pointing right, the arrow is pointing to the current statement; when the arrow is pointing upward or downward, the arrow is indicating the program flow.