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:
Feb. 13, 2001
Filed:
Feb. 12, 1999
Morrel O. Jones, III, Houston, TX (US);
Usha Rajagopalan, Houston, TX (US);
Compaq Computer Corporation, Houston, TX (US);
Abstract
The present invention makes it possible to safely hot plug a PCI expansion slot connected to a 64 bit, 66 Megahertz PCI bus. The PCI bus comprises a plurality of signal lines connecting a PCI Controller to the expansion slot. On each signal line there is a quick switch disposed thereon to detach the signal line from the expansion slot. A bus_enable signal activates the quick switches and a Req_64 mode line to detach or attach the PCI bus from the expansion slot. The Req_64 mode line bypasses the quick switches and goes through a crossbar switch. The crossbar switch has its open state set to an active low wherein the 64 bus mode is thereby communicated to the card as an active low even when the other signal lines of the bus are in a high disconnected state.