A+ Certification/Exam Objectives/Windows
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WIN95/98/ME BOOT PROCESS (Similar to DOS)
- POST is performed.
- Master Boot Record (MBR) is loaded into RAM and locates the boot sector. The boot sector then locates the Io.sys.
- The Io.sys runs Sysinit and loads Msdos.sys into RAM.
- Io.sys then loads System.dat, but does not process at this time.
- Io.sys then loads Config.sys and Autoexec.bat. These are not necessary to load the operating system, but are needed when 16 bit (real mode) drivers are used.
- Io.sys then loads Win.com which start the operating system.
- Win.com loads drivers specified by the registry.
- Win.com processes the System.ini and Win.ini files. System.ini is used to configure the memory cache and buffers. Win.ini is used for 16-bit applications. Otherwise, they are run by the registry.
- Win.com will start KERNEL32.DLL, KERNEL386.EXE, GDI.EXE, and GDI32.EXE. The Kernel files are the operating systems. The GDI files are responsible for the graphical functions and display.
- The Kernel files will load the Explorer user interface, which includes the Desktop, Taskbar, and Start Menu.
- The Kernel will then process anything in the Startup folder and restore network connections.
- The user can now interact with the operating system.