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:
Mar. 02, 1999
Filed:
Sep. 18, 1996
International Business Machines Corp., Armonk, NY (US);
Abstract
A computer system has a central processing unit ('CPU') and a plurality of peripheral devices. A bus interconnects the CPU and the peripheral devices. Command signals are transmitted over the bus including an initiator ready signal ('IRDY'), a device select signal ('DEVSEL'), and a target ready signal ('TRDY'). First and second direct memory access devices ('DMA') are connected to the bus and assigned the same address space. First and second switches selectively connect and disconnect the DEVSEL and TRDY signals that are output from the first and second DMA devices, respectively. Controller logic receives the DEVSEL and TRDY signals and directs the opening and closing of the first and second switches.