Method for reading input/output port data

Details Method for reading input/output port data Method for reading input/output port data

2007-02-15

2009-11-10

Le, Dieu-Minh (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C710S001000

Reexamination Certificate

active

07617417

ABSTRACT:
A method for reading input/output port data is provided. In the present method, a write trap procedure is enabled so that the data is stored in a buffer first when there is data to be written in the input/output port. Then, a read trap procedure is enabled so that the data stored in the buffer is read out and used as the data of the input/output port when there is a need to read the data of the input/output port. Therefore, the defect in the prior art that the basic input/output system (BIOS) in a direct input/output mode can only be written in but cannot be read out is resolved.

REFERENCES:
patent: 4695945 (1987-09-01), Irwin
patent: 5610601 (1997-03-01), Lahti et al.
patent: 6070204 (2000-05-01), Poisner
patent: 6216183 (2001-04-01), Rawlins
patent: 6496891 (2002-12-01), Cluff et al.

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