Respected rajesh sir the great! A number of gadgets including mobile phones, cameras and computers, have a small sized batttery that keeps track of the time. In computers, complementary metal oxide semiconductor (CMOS) is the one that keeps track of time, even if the power is off. If in more deep, it does keep track of time because of a special chip fixed in it call RTC (real time clock). It’s essentially a quartz watch that runs all the time, whether or not the computer has power.
Every personal computer contains two clocks: a built-in hardware clock and a virtual clock. The hardware clock (real-time clock) runs whether the system is on or off. The virtual clock (system clock) is set to the real-time clock when the computer is turned on and exists only while the computer is operating. While the computer is up and running, the two clocks run independent of each other. The system clock is a 24-hour timer and has no real concept of days, whereas the real-time clock tracks the time and date. In fact, the system clock has no concept of traditional hours, minutes, and seconds. It merely increments a counter 18.2 times per second. The operating system, which is dependent upon the system clock for the time, converts the counter into hours, minutes and seconds. As for the date, the operating system reads the real-time clock via the BIOS during initialization, then tracks the date independently based on the virtual-system clock rolling over midnight. In your case, seems that the CMOS battery is not working properly or got dead. In this case, what happens is that computer boots correctly, even all the other things work as usual, but the date and time would be incorrect. Replacing the CMOS battery should be the solution of your problem i guess. Hope it helps. wanna look inside me? My blog is the telescope: http://www.myfriendprateek.blogspot.com regards, prateek agarwal. Skype: Prateek_agarwal32 website: http://www.prateekagarwal.webs.com Best solutions for all your softwares/websites development needs. You tell, I’ll build. ---------- Original message ---------- From: "Asudani, Rajesh" <rajeshasud...@rbi.org.in> To: "accessindia@accessindia.org.in" <accessindia@accessindia.org.in> Date: Mon, 5 Oct 2009 10:05:12 +0530 Subject: [AI] Computer clock haywire Friends The clock of my computer has gone haywire. I mean it lags behind a few hours every time I start my computer. While running the PC, I think it keeps the correct time but goes to slumber once I switch it off. It brings me to seek from you the probable causes of the same and possible remedy as well. I am also curious to know what keeps the clock going while PC is switched off, or a cell phone is switched off. Regards Rajesh Asudani Assistant General Manager (PPS), Reserve Bank of India Nagpur 09420397185 O: 0712 2806676 Res: 0712 2591349 Doth God exact day-labour, light denied?" John Milton ________________________________ Notice: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this email by error, please notify us by return e-mail or telephone and immediately and permanently delete the message and any attachments. The recipient should check this email and any attachments for the presence of viruses. The Bank accepts no liability for any damage caused by any virus transmitted by this email. To unsubscribe send a message to accessindia-requ...@accessindia.org.in with the subject unsubscribe. To change your subscription to digest mode or make any other changes, please visit the list home page at http://accessindia.org.in/mailman/listinfo/accessindia_accessindia.org.in