Each Entry In The Msdos.sys File And It's Purpose

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The information here addresses the Windows 9x and ME systems referenced in the CompTIA 2003 A+ Objectives and is no longer required content for the current A+ Objectives.

This information will remain in place for all to use as a technical reference to legacy systems.

AutoScan

• 0 = Computer does not scan hard drive.
• 1 = Default. Prompts the user before running ScanDisk on hard drive when booting up after the computer was not shut down properly.
• 2 = Automatically scans without prompting the user.

BootMulti

• 0 = Default. Boot only to Windows 9x/Me.
• 1 = Allows for a dual boot.

BootWin

• 1 = Default. Boot to Windows 9x/Me
• 0 = Boot to previous version of DOS.

BootGUI

• 1 = Default. Boot to Windows 9x/Me with the graphic user interface.
• 0 = Boot only to the command prompt for DOS 7.0 (the DOS core of Windows 95) or 7.1 (the DOS core of Windows 98). Autoexec.bat and Config.sys will be executed, and you will be in real-mode DOS.

BootMenu

• 0 = Default. Don't display the startup menu.
• 1= Display the startup menu.

BootMenuDefault

• 1 through 8 = the vaule selected from the startup menu by default. ( Normally this value should be 1 )

BootMenuDelay

• n = Number of seconds delay before the default value in the startup menu is automatically selected.

BootKeys

• 1 = Default. The function keys work during the boot process (F4, F5, F6, F8, Shift + F5, Ctrl + F5, Shift +F8).
• 0 = Disable the function keys during the boot process. (this option can be used to help secure a workstation.)

BootDelay

• n = Number of seconds the boot process waits (when it displays the message "Starting Windows 95" or "Starting Windows 98") for the user to press F8 to get the startup menu (default is 2 seconds)

Logo

• 1 = Default. Display the Windows 9x/Me logo screen.
• 0 = Leave the screen in text mode.

Drvspace

• 1 = Default. Load Drvspace.bin, used for disk compression, if it is present.
• 0 = Don't load Drvspace.bin.

DoubleBuffer

• 1 = Default. When you have a SCSI drive, enables double buffering for the drive.
• 0 = Don't use double buffering for the SCSI drive.

Network

• 1 = If network components are installed, include the option "Safe Mode with network support' in the startup menu.
• 0 = Don't include the option on the start up menu (This is normally set to 0 if the PC has no network components installed. The startup menu is renumbered from this point forward in the menu.)

BootFailSafe

• 1 = Default. Include Safe Mode in the startup menu.
• 0 = Don't include Safe Mode in the Startup menu.

BootWarn

• 1 = Default. Display the Warning message when Windows 9x/Me boots into Safe Mode.
• 0 = Don't display the warning message.

LoadTop

• 1 = default. Load Command.com at the top of conventional memory.
• 0 = Don't load Command.com at the top of conventional memory, (use this option when there is a memory conflict with are of memory.)

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