| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an excellent information processor in which the power saving operation of a sound function can be executed according to the activity of each peripheral equipment having an audio signal output. SOLUTION: It is judged whether or not each peripheral equipment for outputting an audio signal is in a mute state, and a mixer circuit 37A is energy dissipated only for a period when all the peripheral equipment are in a mute state. Also, the mute state of each peripheral equipment and a 'power control flag' in the I/O register of an audio controller 37 are monitored, and even when the power control flag is erroneously set by software during the input of the audio signal from any peripheral equipment, or even when performance is started by the operation of an equipment also used for an audio function such as a CD-ROM drive side during the setting of the power control flag, the mixer circuit 37A can be surely re-enabled.</p> |
