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:
Jan. 10, 1995
Filed:
Oct. 15, 1991
Applicant:
Inventors:
Nader Amini, Boca Raton, FL (US);
Bechara F Boury, Boca Raton, FL (US);
Terence J Lohman, Boca Raton, FL (US);
Assignee:
International Business Machines Corp., Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
395425 ; 395575 ; 364D / ;
Abstract
A direct memory access (DMA) controller for exchanging data information between a system memory and an input/output (I/O) device in an initial data exchange mode and an alternate data exchange mode includes a register for exchanging the data information during both modes and a residual data register for storing residual data information in the register upon commencement of the alternate data exchange mode and for providing the residual data information when the initial data exchange mode is restarted.