Data transmission control apparatus for system with input/output

Details Data transmission control apparatus for system with input/output Data transmission control apparatus for system with input/output

1994-09-15

1997-12-23

Black, Thomas G.

395835, 395837, 395838, G06F 1312

Patent

active

057015120

ABSTRACT:
There is disclosed a data transmission control apparatus in which an image processing unit, for example an image input or output device, is commonly used for plural central processing units for improving the efficiency of the system. A control unit selectively converts one or another of the CPU's to the desired image processing unit, monitoring the status of the connection(s) and refusing new requests for connection to that image processing unit until the latter is no longer needed by the CPU connected to it.

REFERENCES:
patent: 4191997 (1980-03-01), Luiz
patent: 4313161 (1982-01-01), Hardin et al.
patent: 4390943 (1983-06-01), Twibell et al.
patent: 4590549 (1986-05-01), Burrage et al.
patent: 4680641 (1987-07-01), Nakazawa
patent: 4727435 (1988-02-01), Otani et al.

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