Kamino yeh question kab se me tere se puch rahi hu aur tu hai mere hi dimag ki band baja raha hai..........
Not only DOS, all operating systems first loaded to RAM.
When MS-DOS is started, IO.sys is loaded first.Chapter 11: MS-DOS InternalsPg: 284Book: Operating Systems
There is nothing called lenovo DOS OS. DOS is the operating system which can be loaded in lenovo hardware..
yes. of course. MS-DOS does not have a dynamic memory management.
DOS mode
DOS mode
Scandisk.exe
You probably don't have enough lower memory free. Make sure you have DOS loaded high, and that any necessary memory managers to make additional memory (such as EMM386 and HIMEM) are loaded.
An internal command is an MS-DOS command that is stored in the system memory and loaded from the command.com or cmd.exe.
An internal command is an MS-DOS command that is stored in the system memory and loaded from the command.com or cmd.exe.
In MS-DOS, the file that contains internal commands loaded during the booting process is COMMAND.COM. This file serves as the command line interpreter and contains the basic commands necessary for operating the system. When MS-DOS starts, COMMAND.COM is loaded into memory, allowing users to execute commands and run programs.
IO.SYS FILE http://www.techs-on-call.biz/blog/post.cfm/understanding-how-a-computer-works-part-3-early-apple-computers-and-ms-dos