On 11/8/2016 at 11:31 PM, Dellfan said
Found this information here which seems to solve the problem of exiting into MS-DOS from Windows when you have a Dell D600 that has a modified hard disc controller to show your CD or DVD-ROM within Windows - https://support.microsoft.com/en-us/kb/138996
Defining Custom Config.sys and Autoexec.bat Files
To define custom Config.sys and Autoexec.bat files to be processed when you restart your computer using the "Restart the computer in MS-DOS mode" option, follow these steps:
If you have not restarted the computer in MS-DOS mode before, click Start, click Shut Down, click Restart The Computer In MS-DOS Mode, and then click Yes. At the command prompt that appears, type exit and then press ENTER.
Click the Start button, point to Programs, and then click Windows Explorer.
Locate the "Exit to DOS.pif" file in the Windows folder, use the right mouse button to click the file, and then click Properties on the menu that appears.
Click the Program tab, and then click Advanced.
Click Specify A New MS-DOS Configuration, define the custom Config.sys and Autoexec.bat files in the CONFIG.SYS For MS-DOS Mode and AUTOEXEC.BAT For MS-DOS Mode boxes, and then click OK.
You don't have to write anything different in the CONFIG.SYS or AUTOEXEC.BAT files (unless you know what you are doing to make changes in DOS files), just exit out and reboot.
After, if you go to Restart in MS-DOS, it will reboot the system totally, then state "Windows 98 is now starting your MS-DOS_based program". Then you will see the usual Microsoft Windows 98 copyright and the C:\WINDOWS> prompt. If you type "exit" to exit out, it will again reboot the system from the beginning and say "Windows 98 is now restarting...". If you type "win" to exit out, then it will state "You are currently running in MS_DOS mode. Do you want to return to normal mode, to run Windows applications again [Enter=Y. Esc=No]?" Hitting Y will reboot the system again from the beginning and say "Windows 98 is now restarting...".
Took me several days of research to find this information. It may not be a perfect solution, but I hope it helps someone else enjoy Windows 98 on a Dell D600!