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# #* io.sys: Loads the basic I/O software for real mode #* msdos.sys: contains some parameters and switches you can set to affect the way the OS boots #* command.com: preforms three functions:

#*# provides more code to manage I/O #*# provides programs for internal OS commands such as Copy and Delete #*# Searches for Autoexec.bat # Config.sys and autoexec.bat

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Q: What three OS files are necessary to boot in MS DOS mode What is the function of each What additional two files are not required but are used if they are present?
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