Apparatus for transfer-controlling data by direct memory access

Details Apparatus for transfer-controlling data by direct memory access Apparatus for transfer-controlling data by direct memory access

1994-12-19

1998-03-03

Harvey, Jack B.

395847, 395848, 395733, 395740, 395868, 395438, 395439, 395308, 395821, 395872, H01J 300

Patent

active

057246092

ABSTRACT:
A bus controller provided with a buffer memory performs DMA data transfer between a main storage unit of a system bus and an input/output control unit of a local bus. An interruption control section of the bus controller keeps an interruption signal at a response suppress section upon detection of an input/output end interruption signal from a unit on the local bus side, and thus suppress sending thereof to a processor of the system bus. When the end of data transfer to the main storage unit is determined from the data transfer monitor section in the interruption suppressed state, the suppressed state is released and an input/output end interruption notice is given to the processor. Even upon earlier end of data transfer on the local bus, therefore, consistency of data sent to the main storage is ensured.

REFERENCES:
patent: 4722051 (1988-01-01), Chattopadhya
patent: 5131081 (1992-07-01), MacKenna et al.
patent: 5179663 (1993-01-01), Iimura
patent: 5287486 (1994-02-01), Yamasaki et al.
patent: 5307471 (1994-04-01), Ishikawa
patent: 5398324 (1995-03-01), Matida et al.
patent: 5414816 (1995-05-01), Oyadomari
patent: 5416907 (1995-05-01), Polzin et al.
patent: 5463752 (1995-10-01), Benhase et al.
patent: 5475859 (1995-12-01), Kamabayshi et al.
patent: 5539913 (1996-07-01), Furuta et al.

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