Inquiring apparatus and method thereof

Details Inquiring apparatus and method thereof Inquiring apparatus and method thereof

2007-08-28

2007-08-28

Sparks, Donald (Department: 2181)

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral monitoring

C710S018000, C710S046000, C710S047000, C710S109000, C713S300000, C713S320000, C713S321000, C713S322000, C713S323000, C713S324000, C713S340000

Reexamination Certificate

active

10873011

ABSTRACT:
An inquiring apparatus and method thereof is provided for assisting the CPU to inquire the state of the peripheral device. When the CPU needs to perform an inquiring process to wait for a peripheral device to come to an expected state, an inquiring apparatus is activated, instead of the CPU, to perform an inquiring process. The CPU is placed in a power-saving state which stops outputting the clock to the CPU when the inquiring apparatus performs the inquiring process. The inquiring process includes outputting a read cycle to the peripheral device receiving a current state of the peripheral device in response to the read cycle; and comparing the current state with the expected state. If the current state and the expected state are the same, the clock is outputted to the CPU again.

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