DOS Boot-up Sequence
hidden file in the root directory of the primary drive. This
file provides the basic I/O capabilities for the system, allowing
it the ability to communicate with the different peripherals.
IO.SYS directs the overall process of loading the Operating
Also a hidden file in the root directory sometimes called the
kernal for DOS. When an application needs to access a device
or peripheral, this file translates the request into actions
that IO.SYS can perform.
A user-configurable text file that usually contains device drivers
and system setup values.
This is the Command Interpreter. It can accept commands from
the user, launch programs and pass this Information to MSDOS.SYS.
Another user-configurable text file that is used to set system
variables and load TSRs.