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:
Oct. 03, 1989
Filed:
Sep. 03, 1987
Applicant:
Inventors:
Michael D Smith, Palo Alto, CA (US);
Richard A Lemay, Carlisle, MA (US);
Assignee:
Bull HN Information Systems Inc., Billerica, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364200 ; 3642409 ; 3642679 ; 3642443 ; 3642456 ;
Abstract
A data processing system includes a number of subsystems all coupled in common to a system bus and communicate with each other by sending and receiving commands sent over the system bus. A central processing subsystem includes a response memory for storing indication of the responses sent by the receiving subsystem when receiving commands sent by the central processing subsystem. The responses include an acknowledge response, a not acknowledge response or no response--a timeout. Storing the acknowledge response and the timeout will enable the programmer to determine which of the three responses was received.