Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output process timing
Patent
1997-07-21
1999-11-02
Ray, Gopal C.
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output process timing
710100, 713501, G06F 1342, G06F 1300, G06F 112
Patent
active
059788690
ABSTRACT:
A methodology and implementing system 101 are provided in which a PCI bus is enhanced to operate at a plurality of data transfer speeds, including for example, 133 MHz in order to accommodate subsystem boards operating at higher frequencies, while at the same time allowing normal 66 MHz PCI clocking for devices designed to operate at the lower 66 MHz standard PCI speed. Master strobe MSTB 303, 403 and target strobe TSTB signals 309, 411 are generated in a handshaking methodology to determine if a master data transaction requesting device and a target data transaction device are designed to operate at the higher data transfer frequency. Higher frequency capable devices or boards are run at the increased frequency when both the requesting master and the selected target devices request the higher transfer rate, and standard devices or boards are run at the lower standard PCI frequency, while both master and target devices are coupled to and run from the same multi-speed PCI bus 125.
REFERENCES:
patent: 4931924 (1990-06-01), Kageura
patent: 5058054 (1991-10-01), Feldman
patent: 5386517 (1995-01-01), Sheth et al.
patent: 5513327 (1996-04-01), Farmwald et al.
patent: 5535343 (1996-07-01), Verseput
patent: 5537660 (1996-07-01), Bond et al.
patent: 5625847 (1997-04-01), Ando et al.
patent: 5809291 (1998-09-01), Munoz-Bustamante et al.
patent: 5838995 (1998-11-01), Chen et al.
Guthrie Guy Lynn
Kelley Richard Allen
Neal Danny Marvin
Thurber Steven Mark
International Business Machines - Corporation
McBurney Mark E.
Ray Gopal C.
Wilder Robert V.
LandOfFree
Enhanced dual speed bus computer system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced dual speed bus computer system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced dual speed bus computer system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2150565