1994-11-14
1997-10-21
Auve, Glenn A.
395309, G06F 1300
Patent
active
056806469
ABSTRACT:
The present invention relates to a character input/output processing system in an information processing system. A character input/output system of the present invention includes two buffers, a first buffer for storing input/output character data by the application program and a second buffer for storing input/output character data by the preferential process, which requires preferential character input/output. The character input/output system further includes an input/output adapter which is provided, independent of the processor, between the terminals and processor for the input/output processing between the processor and terminals. The input/output adapter is structured to store the character data inputted from the terminals to the first buffer and the second buffer, and to output the character data stored in the first buffer to the terminals during the operation by the application program or outputs the character data stored in the second buffer to the terminals during the operation by the preferential process. The present invention ensures, even in case the terminals are used in common by the application program and the preferential process, that character input/output by the preferential process can be realized immediately without stopping the operation of the input/output adapter.
REFERENCES:
patent: 4188664 (1980-02-01), DeShon
patent: 4710762 (1987-12-01), Yamada
patent: 5001744 (1991-03-01), Nishino et al.
patent: 5222062 (1993-06-01), Shorma et al.
patent: 5226040 (1993-07-01), Noble, III et al.
Using Microprocessors and Microcomputers: The 6800 Family, Joseph D. Greenfield William C. Wray, 1981 pp. 239-258.
Auve Glenn A.
Fujitsu Limited
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