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:
Dec. 29, 1981
Filed:
Sep. 28, 1979
Kuppuswamy Raghunathan, Austin, TX (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A microcomputer system having a single step capability for use for debugging a program is provided. The microcomputer has a microprocessor which provides a load instruction signal. The load instruction signal is used to couple a software interrupt op code into the microprocessor. During the software interrupt routine, contents of registers indicating the state of the microprocessor are transferred to a stack. As the contents are being transferred they will be available on the microprocessor output bus for capture and observation. Upon completion of the software interrupt routine a return from single step instruction causes the contents of the stack to be placed back in their original registers and the program counter of the microprocessor is decremented by one so that the microprocessor can pick up the program from the point where it was interrupted.