FIFO device

Details FIFO device FIFO device

2002-10-29

2009-10-20

Flynn, Nathan J (Department: 2454)

Electrical computers and digital processing systems: multicomput

Network-to-computer interfacing

C709S230000, C709S232000, C709S233000, C709S234000, C709S235000

Reexamination Certificate

active

07606941

ABSTRACT:
A receiving FIFO device can prevent a PCI bus from being occupied unnecessarily to enhance the performance of a whole system. An input control part checks in a third comparing part whether or not a received packet written in a memory part is an error packet on the basis of acknowledge information contained in a trailer part of the received packet. If the received packet is the error packet, the input control part supplies a signal EMPTY being HIGH to an output control device and cancels the received packet, thereby preventing the error packet from being transferred to a receiving DMA device. Furthermore, the input control part checks in a second comparing part whether or not the received packet written in the memory part belongs to a predetermined type of packet on the basis of tcode information contained in the first quadret of a header part of the received packet. Only if the received packet belongs to the predetermined type of packet, the input control part cancels the received packet for a predetermined type of error.

REFERENCES:
patent: 5291189 (1994-03-01), Otake et al.
patent: 5515482 (1996-05-01), Yamamoto et al.
patent: 5664078 (1997-09-01), Yamamoto et al.
patent: 5710773 (1998-01-01), Shiga
patent: 5752076 (1998-05-01), Munson
patent: 5771046 (1998-06-01), Izawa et al.
patent: 5781599 (1998-07-01), Shiga
patent: 5787256 (1998-07-01), Marik et al.
patent: 5838922 (1998-11-01), Galand et al.
patent: 5895502 (1999-04-01), Yamamoto
patent: 5982398 (1999-11-01), Yamamoto
patent: 5987126 (1999-11-01), Okuyama et al.
patent: 5991304 (1999-11-01), Abramson
patent: 6055590 (2000-04-01), Pettey et al.
patent: 6198751 (2001-03-01), Dorsey et al.
patent: 6226338 (2001-05-01), Earnest
patent: 6232986 (2001-05-01), Yamamoto
patent: 6356951 (2002-03-01), Gentry, Jr.
patent: 6732223 (2004-05-01), Johnson
patent: 6904475 (2005-06-01), Fairman
patent: 6957270 (2005-10-01), Erimli et al.
patent: 7020724 (2006-03-01), Emerson et al.
patent: 2001/0017860 (2001-08-01), Hata
patent: 2002/0176425 (2002-11-01), Aoki
patent: 2006/0117119 (2006-06-01), Emerson et al.
U.S. Appl. No. 10/067,481, of Yamamoto, filed Feb. 5, 2002.

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