| 摘要 |
<p>PURPOSE:To effectively operate a sleeve function in any application software by giving a function checking the processing content of CPU by means of hardware. CONSTITUTION:The signal bit of 'CPU is idle' is given to specified input/output and the bit is set only at the time when a system reads the port and at the time of a DMA cycle. Then, the bit is cleared when resetting and sleeving are prohibited or at the time of reading/writing input/output and at the time of reading/writing a video memory. The bit is referred to the input/output status check routine of BIOS(basic input/output routine). Thus, the kind of processing executed before and after it is judged and a clock is controlled. A sleeve indicator 8 gives information that the system is in the middle of sleeving to a user. Consequently, the user can judge how much battery is consumed by the degree of display.</p> |
