计时程序,对8253进行分频,使用二个计数器,使第二个计数器的OUT作为中断源,送到8259产生中断,在LED上显示时间-time procedures for the 8,253-frequency, the use of two counters, so that a second counter OUT interrupted as a source to have interrupted 8259, the time shown on the LED
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001381s ]
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:0.111348s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001499s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001995s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002649s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003555s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001007s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003158s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014742s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001304s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 320765 [ RunTime:0.002374s ]
