改程序通过使用8254和8255以及其他一些辅助芯片实现了一个简单但功能比较完善的电子钟-Reform process through the use of 8254 and 8255, as well as other ancillary chip features a simple but fairly complete electronic bell
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001234s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001050s ]
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