unless u're shutting down or disable paging. ----- Original Message ----- From: Ketan Mukadam <ketan@iitk.ac.in> Date: Friday, March 1, 2002 1:28 pm Subject: Re: Real-Mode of Intel processors!! > > On Fri, 1 Mar 2002, Thomas Abraham wrote: > > ==>Hi Ketan, > ==> This is in response to your query on real mode. > ==> > ==>Intel processors can work in two modes. Real mode and > ==>Protected mode. In real mode, processor works with 16 > ==>bits. All the memory managment and process mangament > ==>features are turned off in this mode. But in protected > ==>mode these features are turned on which is very > ==>essentail for an operating system. > ==> > ==> Now when the computer boots up, the processor is > ==>initally in reak mode. Now OS is boot starped and if > ==>that OS need to work in protected mode of the Intel > ==>processors, then it executes an instruction to switch > ==>to protected mode and utilize process features. > ==> > ==> Maybe this explanation is incomplete and vague. If > ==>you need mode info please mail to me. > ==> > ==>Regards, > ==>Thomas > ==> > ==>( This is the first time I am replaying to a query on > ==>a mailing list.) > > first of all thank you Thomas for replying. > > Actually what you have written, that stuff i already know, but > what i wanted to > know is that where the real-mode is used except bootstrapping. > Once ur OS gets > booted the processor is switched in protected mode.[ This is true > of Linux ] Now > in which situations it returns to real-mode or is it that it never > goes into > real-mode after booting?? > > [Sorry,but I prefer to have the discussion on the mailing list. Is > thisoff-topic?] > > Regards > Ketan > > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > IRC Channel: irc.openprojects.net / #kernelnewbies > Web Page: http://www.kernelnewbies.org/ > >
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