本源代码是单片机乒乓球实验，用89C51，74LS164和8255完成- The source code is the monolithic integrated circuit ping pong
experiment, with 89C51, 74LS164 and 8,255 completes
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001816s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.079741s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000869s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001158s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000894s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003151s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000741s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004236s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017527s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001252s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 112676 [ RunTime:0.020237s ]
