Fifo buffer capable of partially erasing data set held therein

Details Fifo buffer capable of partially erasing data set held therein Fifo buffer capable of partially erasing data set held therein

1997-04-01

1999-05-25

Chan, Eddie P.

395876, G06F 1500, G06F 1576

Patent

active

059077166

ABSTRACT:
A FIFO buffer capable of erasing any particular data set or sets without influencing the data sets not to be erased. At the time of writing data sets into the FIFO buffer, the starting point of the data set is recognized and the pointer value of the write pointer at that time is stored in a pointer buffer. When an erase instruction is given, the pointer value stored in the pointer buffer is loaded at the write pointer or the read pointer in response to the erase instruction. By this, the data sets after the specified pointer value or the data sets before the specified pointer value at the pointer value conforming to the data set to be erased in the pointer buffer. When the value of the read pointer reaches a pointer value to which the erase flag is attached, the value of the read pointer is made to skip to the next pointer value. By this, it is possible to erase any particular desired data set or sets as well.

REFERENCES:
patent: 5644539 (1997-07-01), Yamagami et al.
patent: 5771366 (1995-06-01), Bjorksten et al.
patent: 5778420 (1996-02-01), Shitara et al.
patent: 5784597 (1995-09-01), Chiu et al.

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