Inventec Corp.

Kingboard Ma

Vam Chang

Kuang-Shin Lin

Xian-Hong Shen

A PC interval timer test method used in a personal computer to test the abnormality of the interval timer of a PC (personal computer) by: calculating the difference between the periodic interrupt frequency of the PC's CMOS Real Time Clock (R.T.C.) and the interval timer interrupt frequency within the same time period, and then judging the result by comparing the value of the difference thus obtained with the set maximum allowable value of error of the CMOS R.T.C.'s periodic interrupt frequency. The maximum frequency of the CMOS R.T.C. can be as high as 8192 Hz, so that the test error can be as minor as below 1/8192.

PC interval timer test method

The present invention relates to a sound blaster interface card auto-detection method, which is applicable to all kinds of brands of sound blaster interface card supplied in the market. The present invention enables a computer system to automatically detect the indexes of the Connecting Port (PORT or Base Port), Interrupt Request (IRQ) and Direct Memory Access Channel (DMA) of a sound blaster interface card inserted therein and to activate the sound blaster interface card after receiving said indexes.

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Tientsin, China

Kingboard Ma